NCERT Exemplar Class 12 Chemistry Solutions chapter 13 Amines

Access premium articles, webinars, resources to make the best decisions for career, course, exams, scholarships, study abroad and much more with

Plan, Prepare & Make the Best Career Choices

NCERT Exemplar Class 12 Chemistry Solutions chapter 13 Amines

Q: 1. Why should one pay attention to this chapter and NCERT exemplar Class 12 Chemistry solutions chapter 13?

C lass 12 Chemistry NCERT exemplar solutions chapter 13 covers the topic of amines which is a crucial part of organic chemistry. Those who are planning to take up engineering or biochemistry should not skip this chapter.

Q: 2. How are these NCERT exemplar Class 12 Chemistry chapter 13 solutions helpful?

Students can make the most of these questions and NCERT exemplar solutions for C lass 12 Chemistry chapter 13 by understanding the topic better and also these solutions will help in answering the questions asked in the exam.

Q: 3. What all topics are included in this Class 12 Chemistry NCERT exemplar solutions chapter 13?

The entire chapter covers the topic of amines, its properties, types, classification, applications and uses, and the chemical reactions.

Q: 4. Are these NCERT exemplar Class 12 Chemistry solutions chapter 13 useful in board exams?

- Yes, these NCERT exemplar Class 12 Chemistry chapter 13 Solutions are helpful for board exams as they help in understanding topics better and also in learning the pattern of the paper.

Edited By sumit saini | Updated on Sep 17, 2022 11:10 AM IST | #CBSE Class 12th

NCERT exemplar Class 12 Chemistry solutions chapter 13 Anime - Do you wonder how medicines or fibres are synthesized? What does cough syrups like Benadryl contain? NCERT exemplar Class 12 Chemistry chapter 13 solutions, answers questions like these and in turn defines Amines as a vital group of organic compounds derived by replacing some hydrogen atoms in ammonia molecule with alkyl or aryl groups, which often occur naturally in vitamins, proteins, hormones, and alkaloids. Class 12 Chemistry NCERT exemplar solutions chapter 13 discusses the structure and geometry of amines, the classification of amines as primary, secondary, and tertiary, the naming of amines, methods to prepare them, the properties of amines, the process of formation of diazonium salts, and their importance. All of which are detailed in the NCERT exemplar Class 12 Chemistry solutions chapter 13 pdf download

Latest: JEE Main high scoring chapters | JEE Main 10 year's papers

Recommended: NEET high scoring chapters

New: Aakash iACST Scholarship Test. Up to 90% Scholarship. Register Now

This Story also Contains

NCERT Exemplar Class 12 Chemistry Solutions Chapter 13: MCQ (Type 1)
NCERT Exemplar Class 12 Chemistry Solutions Chapter 13: MCQ (Type 2)
NCERT Exemplar Class 12 Chemistry Solutions Chapter 13: Short Answer Type
NCERT Exemplar Class 12 Chemistry Solutions Chapter 13: Matching Type
NCERT Exemplar Class 12 Chemistry Solutions Chapter 13: Assertion and Reason Type
NCERT Exemplar Class 12 Chemistry Solutions Chapter 13: Long Answer Type
Main Subtopics of NCERT Exemplar Solutions for Class 12 Chemistry Chapter 13 Amines
NCERT Exemplar Class 12 Chemistry Solutions Chapter 13 Amines - Learning Outcome
NCERT Exemplar Class 12 Chemistry Solutions
Important Topics Covered in NCERT Exemplar Solutions For Class 12 Chemistry Chapter 13

NCERT Exemplar Class 12 Chemistry Solutions Chapter 13: MCQ (Type 1)

Question:1

Which of the following is a $3^{o}$ amine?
(i) 1-methylcyclohexylamine
(ii) Triethylamine
(iii) tert-butylamine
(iv) N-methyl aniline
Answer:

Option (ii) is the correct answer.

Question:2

The correct IUPAC name for $CH_{2}=CHCH_{2} NHCH_{3}$ is
(i) Allylmethylamine
(ii) 2-amino-4-pentene
(iii) 4-aminopent-1-ene
(iv) N-methylprop-2-en-1-amine
Answer:

Option (iv) is the correct answer.

Question:3

Amongst the following, the strongest base in aqueous medium is ____________.
(i) $CH_{3}NH_{2}$
(ii) $NCCH_{2}NH_{2}$
(iii) $(CH_{3})_{2}NH$
(iv) $C_{6}H_{5}NHCH_{3}$
Answer:

Option (iii) is the correct answer.
Explanation: $(CH_{3})_{2}NH$ is a $2^{o}$ amine and $CH_{3}NH_{2}$ is a $1^{o}$ amine, therefore $(CH_{3})_{2}NH$ is more basic than $CH_{3}NH_{2}$ . And because of –I effect of CN group, $NC-CH_{2}NH_{2}$ is less basic than $CH_{3}NH_{2}$ . Moreover, $C_{6}H_{5}NHCH_{3}$ is the least basic and less basic than $CH_{3}NH_{2}$ and $(CH_{3})_{2}NH$ ; it is due to delocalisation of lone pair electrons that are present in nitrogen atom into the benzene ring. Therefore, the decreasing order of amines will be:
$\left ( CH_{3} \right )_{2}NH>CH_{3}NH_{2}>C_{6}H_{5}NHCH_{3}>NC-CH_{2}NH_{2}$

Question:4

Which of the following is the weakest Brönsted base?

Answer:

Option (A) is the correct answer.
Explanation: The lone pair of electrons on the N-atom has delocalised into the benzene ring; therefore $C_{6}H_{5}NH_{2}$ s the weakest base.

Question:5

Benzylamine may be alkylated, as shown in the following equation:
$C_{6}H_{5}CH_{2}NH_{2} + R-X \rightarrow C_{6}H_{5}CH_{2}NHR$
Which of the following alkyl halides is best suited for this reaction through $S_{N}1$ mechanism?
(i) $CH_{3}Br$
(ii) $C_{6}H_{5}Br$
(iii) $C_{6}H_{5}CH_{2}Br$
(iv) $C_{2}H_{5}Br$
Answer:

Option (iii) is the correct answer.
Explanation: $S_{N}1$ is a two-step reaction. At first, $R-X$ bond is broken, which produces carbocation. Then nucleophile attacks the carbocation. The more the stability of carbocation, the more will be the rate of reaction. Benzylic halides are highly reactive towards $S_{N}1$ reactions.

Question:6

Which of the following reagents would not be a good choice for reducing an aryl nitro compound to an amine?
(i) $\text {H}_{2}$ (excess)/Pt
(ii) $\text {LiAIH}_{4}$ in ether
(iii) $\text {Fe}$ and $\text {HCl}$
(iv) $\text {Sn}$ and $\text {HCl}$
Answer:

Option (ii) is the correct answer.
Explanation: Using $\text {LiAIH}_{4}$ in ether, Aryl-nitro compounds can't convert into an amine.

Question:7

In order to prepare a 1° amine from an alkyl halide with simultaneous addition of one $\text {CH}_{2}$ group in the carbon chain, the reagent used as source of nitrogen is ___________.
(i) Sodium amide, $\text {NaNH}_{2}$
(ii) Sodium azide, $\text {NaN}_{3}$
(iii) Potassium cyanide, $\text {KCN}$
(iv) Potassium phthalimide, $\text {C}_{6}\text {H}_{4}\left ( \text {CO}_{2} \right )\text N^{-}K^{+}$

Answer:

Option (iii) is the correct answer.
Explanation: The number of carbon atoms increases with the help of $\text {KCN}$

Question:8

The source of nitrogen in Gabriel synthesis of amines is _____________.
(i) Sodium azide, $\text {NaN}_{3}$
(ii) Sodium nitrite, $\text {NaNO}_{2}$
(iii) Potassium cyanide, $\text {KCN}$
(iv) Potassium phthalimide, $\text {C}_{6}\text {H}_{4}\left ( \text {CO} \right )_{2}\text N^-K^+$
Answer:

Option (iv) is the correct answer.
Explanation: In Gabriel's synthesis, Potassium Phthalimide is the source of nitrogen.

Question:9

Amongst the given set of reactants, the most appropriate for preparing 2° amine is _____.
(i) 2° $\text {R-Br+NH}_{3}$
(ii) 2° $\text {R-Br+NaCN}$ followed by $\text {H}_{2}/\text {Pt}$
(iii) 1° $\text {R-NH}_{2}+\text {RCHO}$ followed by $\text {H}_{2}/\text {Pt}$
(iv) 1° $\text {R-Br}\left ( \text {2 mol} \right )+$ potassium phthalimide followed by $\text {H}_{3}\text {O}^{+}$ /heat
Answer:

Option (iii) is the correct answer.

Question:10

The best reagent for converting 2–phenylpropanamide into 2-phenylpropanamine is _____.
(i) excess $\text {H}_{2}$
(ii) $\text {Br}_{2}$ in aqueous $\text {NaOH}$
(iii) iodine in the presence of red phosphorus
(iv) $\text {LiAlH}_{4}$ in ether
Answer:

Option (iv) is the correct answer.

Question:11

The best reagent for converting, 2-phenylpropanamide into 1- phenylethanamine is ____.
(i) excess $\text {H}_{2}/\text {Pt}$
(ii) $\text {NaOH}/\text {Br}_{2}$
(iii) $\text {NaBH}_{4}$ /methanol
(iv) $\text {LiAlH}_{4}$ /ether

Answer:

Option (ii) is the correct answer.

Question:12

Hoffmann Bromamide Degradation reaction is shown by __________.
(i) $\text {ArNH}_{2}$
(ii) $\text {ArCONH}_{2}$
(iii) $\text {ArNO}_{2}$
(iv) $\text {ArCH}_{2}\text {NH}_{2}$

Answer:

Option (ii) is the correct answer.

Question:13

The correct increasing order of basic strength for the following compounds is______________.

(i) II < III < I
(ii) III < I < II
(iii) III < II < I
(iv) II < I < III
Answer:

Option (iv) is the correct answer.
Explanation: The basic strength is decreased with electron-withdrawing groups, and it is increased with electron releasing groups of aniline.

Question:14

Methylamine reacts with $\text {HNO}_{2}$ to form _________.
(i) $\text {CH}_{3}\text {-O-N=O}$
(ii) $\text {CH}_{3}\text {-O-CH}_{3}$
(iii) $\text {CH}_{3}\text {OH}$
(iv) $\text {CH}_{3}\text {CHO}$
Answer:

Option (iii) is the correct answer.
Explaination : $(c)\; \text {CH}_{3}\text {NH}_{2}+\text {HNO}_{3}\overset{0^{o}-5^{o}C}{\rightarrow}\text {CH}_{3}\text {OH}+\text {N}_{2}+\text {H}_{2}\text {O}$

Question:15

The gas evolved when methylamine reacts with nitrous acid is __________.
(i) $\text {NH}_{3}$
(ii) $\text {N}_{2}$
(iii) $\text {H}_{2}$
(iv) $\text {C}_{2}\text {H}_{6}$
Answer:

Option (ii) is the correct answer.
Explanation: The chemical reaction of methylamine with nitrous acid is as follows:

Question:16

In the nitration of benzene using a mixture of conc. $\text {H}_{2}\text {SO}_{4}$ and conc. $\text {HNO}_{3}$ , the species which initiates the reaction is __________.
(i) $\text {NO}_{2}$
(ii) $\text {NO}^{+}$
(iii) $\text {NO}_{2}^+$
(iv) $\text {NO}_{2}^{-}$
Answer:

Option (iii) is the correct answer.
Explanation: The process of nitration is initiated by $\text {NO}_{2}^+$ (Nitronium Ion) electrophile. It is then obtained as:
$H_{2}SO_{4}\left ( conc. \right )\rightarrow H^{+}+HSO_{4}^{-}$
$H^{+}+HNO_{3}\rightarrow H_{2}NO_{3}^{+}$
$H_{2}NO_{3}^{+}\rightarrow NO_{2}^{+}+H_{2}O$

Question:17

Reduction of aromatic nitro compounds using $\text {Fe and HCl}$ gives __________.
(i) aromatic oxime
(ii) aromatic hydrocarbon
(iii) aromatic primary amine
(iv) aromatic amide
Answer:

Option (iii) is the correct answer.
Explanation :

Question:18

The most reactive amine towards dilute hydrochloric acid is ___________.

Answer:

Option (ii) is the correct answer.
Explanation: The reactivity towards dilute $HCl$ is more if the strength of the base is more. Therefore, $\left ( CH_{3} \right )_{2}NH$ has the highest basic strength.

Question:19

Acid anhydrides on reaction with primary amines give ____________.
(i) amide
(ii) imide
(iii) secondary amine
(iv) imine
Answer:

Option (i) is the correct answer.
Explanation:
$\\(a)C_{2}H_{5}NH_{2}+\left ( CH_{3}CO \right )_{2}O\rightarrow CH_{3}CONHC_{2}H_{5}+CH_{3}COOH \\$
N-Ethylacetamide

Question:20

The reaction $ArN_{2}^+Cl^{-} \overset{Cu/HCl}{\rightarrow} ArCl + N_2+ CuCl$ is named as _________.
(i) Sandmeyer reaction
(ii) Gatterman reaction
(iii) Claisen reaction
(iv) Carbylamine reaction
Answer:

Option (ii) is the correct answer.
Explanation:

Question:21

The best method for preparing primary amines from alkyl halides without changing the number of carbon atoms in the chain is
(i) Hoffmann Bromamide reaction
(ii) Gabriel phthalimide synthesis
(iii) Sandmeyer reaction
(iv) Reaction with $NH_{3}$
Answer:

Option (ii) is the correct answer.
Explanation: To get primary amines from alkyl halide without changing the number of carbon atoms, Gabriel Phthalimide synthesis is used.

Question:22

Which of the following compound will not undergo an azo coupling reaction with benzene diazonium chloride.
(i) Aniline
(ii) Phenol
(iii) Anisole
(iv) Nitrobenzene
Answer:

Option (iv) is the correct answer.
Explanation: Diazonium Chloride is a very weak electrophile; therefore, it reacts with any electron rich compound which contains electron donating groups; $-OH, -NO_{2}, -OCH_{3}$ . The compounds should not contain electron withdrawing groups like: $-NO_{2}$ , etc.

Question:23

Which of the following compounds is the weakest Brönsted base?

Answer:

Option (iii) is the correct answer.
Explanation: All the amines have a tendency to accept protons, therefore are stronger Bronsted Bases than phenols and alcohols. And since phenol is much more acidic than alcohol, Phenols have fewer tendencies to accept any proton. Hence the weakest.

Question:24

Among the following amines, the strongest Brönsted base is __________.

Answer:

Option (iv) is the correct answer.
Explanation: $NH_{3}$ is a stronger base than aniline because of the delocalisation of the lone pair of electrons at N-atom and into the Benzene Ring. And in Pyrrole, as the lone pair electrons on N-atom donate to aromatic sextet formation, it is not basic at all. Hence, Pyrrolidine accepts the proton readily while also being the strongest base.

Question:25

The correct decreasing order of basic strength of the following species is _______. $H_{2}O, NH_{3}, OH^{-}, NH_{2}^{-}$
$(i)\; NH_{2}^{-}>OH^{-}>NH_{3}>H_{2}O$
$(ii)\; OH^{-}>NH_{2}^{-}>H_{2}O>NH_{3}$
$(iii)\;NH_{3}>H_{2}O>NH_{2}^{-}>OH^{-}$
$(iv)\;H_{2}O>NH_{3}>OH^{-}>NH_{2}^{-}$
Answer:

Option (i) is the correct answer.
Explanation: The electronegativity of $O$ is more than $N$ atom; therefore, $O-H$ bond is more polar than $N-H$ bond. Therefore, $O-H$ is more acidic than the $N-H$ bond. $NH_{2}^-$ and $OH^-$ , both have a negative charge, and because of that, they are more basic than $NH_{3}$ and $H_{2}O$ .

Question:26

Which of the following should be most volatile?

(i) II
(ii) IV
(iii) I
(iv) III
Answer:

Option (ii) is the correct answer.
Explanation: The boiling points of 1° and 2° amines are higher than 3° amines because of intermolecular H-Bonding. They are also less volatile than 3° amines and hydrocarbons of similar molecular mass.

Question:27

Which of the following methods of preparation of amines will not give the same number of carbon atoms in the chain of amines as in the reactant?
(i) The reaction of nitrite with $LiAlH_{4}$ .
(ii) The reaction of the amide with $LiAlH_{4}$ followed by treatment with water.
(iii) Heating alkyl halide with potassium salt of phthalimide followed by hydrolysis.
(iv) Treatment of amide with bromine in the aqueous solution of sodium hydroxide.
Answer:

Option (iv) is the correct answer.

NCERT Exemplar Class 12 Chemistry Solutions Chapter 13: MCQ (Type 2)

Question:28

Which of the following cannot be prepared by Sandmeyer's reaction?
(i) Chlorobenzene
(ii) Bromobenzene
(iii) Iodobenzene
(iv) Fluorobenzene
Answer:

Option (iii) and (iv) are the correct answers.
Explanation: Using Sandmeyer's reaction, Chloro and Bromo arenes are prepared. And by simply warming Diazonium salt solution with aqueous $KI$ solution, Iodarenes can be prepared. Fluoroarenes are made using Balz-Schiemann reaction. All other reagents give off aniline.

Question:29

Reduction of nitrobenzene by which of the following reagent gives aniline?
(i) ${Sn}/{HCl}$
(ii) ${Fe}/{HCl}$
(iii) $H_{2}-Pd$
(iv) ${Sn}/{NH_{4}OH}$
Answer:

Option (i), (ii) and (iii) are the correct answers.

Question:30

Which of the following species are involved in the carbylamine test?
(i) $R-NC$
(ii) $CHCl_{3}$
(iii) $COCl_{2}$
(iv) $NaNO_{2}+HCl$
Answer:

Option (i) and (ii) are the correct answers.
Explanation: Amine when reacts with a mixture of $\text {CHCl}_{3}$ and $\text {KOH}$ gives out alkyl isocyanate. This reaction is called a Carbylamine reaction.
Here, $\text {R-NH}_{2}+\text {CHCl}+\text {3KOH}\rightarrow \text {RNC}+\text {3KCl}+\text {3H}_{2}\text {O}$ Only $\text {RNC}$ and $\text {CHCl}_{3}$ are involved in carbylamine reaction.

Question:31

The reagents that can be used to convert benzene diazonium chloride to benzene are __________.
(i) ${SnCl_{2}}/{HCl}$
(ii) $CH_{3}CH_{2}OH$
(iii) $H_{3}PO_{2}$
(iv) $LiAlH_{4}$
Answer:

Option (ii) and (iii) are the correct answers.
Explanation :

Question:32

The product of the following reaction is __________.

Answer:

Option (A) and (B) is the correct answer.
Explanation :

Question:33

Arenium ion involved in the bromination of aniline is __________.

Answer:

Option (i), (ii) and (iii) are the correct answers.
Explanation: Bromination of aniline involves Arenium is as follows:

Question:34

Which of the following amines can be prepared by Gabriel synthesis.
$\\(i) Isobutyl amine\\ (ii) 2-Phenylethylamine\\ (iii) N-methyl benzylamine\\ (iv) Aniline$
Answer:

Option (i) and (ii) are the correct answers.
Explanation: $(CH_{3})_{2}CH-CH_{2}NH_{2}$ and $C_{6}H_{5}CH_{2}NH_{2}$ are the primary aliphatic amines that can be prepared by Gabriel synthesis. $2^{o}$ amines are $C_{6}H_{5}CH_{2}NHCH_{3} (C)$ and $1^{o}$ amine, $C_{6}H_{5}NH_{2}$ cannot be prepared by this process.

Question:35

Which of the following reactions are correct ?

Answer:

Options (i) and (iii) are the correct answers.
Explanation : $CH_{3}CH_{2}NH_{2}+NH_{4}Cl$

Question:36

Under which of the following reaction conditions, aniline gives p-nitro derivative as the major product?
(i) Acetyl chloride/pyridine followed by reaction with $conc. H_{2}SO_{4} + conc. HNO_{3}$
(ii) Acetic anhydride/pyridine followed by $conc. H_{2}SO_{4} + conc. HNO_{3}$
(iii) Dil. HCl followed by reaction with $conc. H_{2}SO_{4} + conc. HNO_{3}$
(iv) Reaction with $conc. HNO_{3}+conc. H_{2}SO_{4}$
Answer:

Option (i) and (ii) are the correct answers.
Explanation: When aniline reacts with acetyl chloride or acetic anhydride in the presence of pyridine produces N-acetyl aniline. This is a ortho, para directing group which produces p-nitroaniline on reaction with nitrating mixtures. As shown below:

Question:37

Which of the following reactions belong to electrophilic aromatic substitution?
(i) Bromination of acetanilide
(ii) Coupling reaction of aryldiazonium salts
(iii) Diazotisation of aniline
(iv) Acylation of aniline
Answer:

Option (i) and (ii) are the correct answers.
Explanation: Nucleophilic substitution reaction where $-NH_{2} \; and\; H$ $�NH_{2} \; and\; H$ atoms are replaced by acyl groups is known as Acylation. Diazotisation is also a type of nucleophilic substitution reaction.

NCERT Exemplar Class 12 Chemistry Solutions Chapter 13: Short Answer Type

Question:38

What is the role of $\text {HNO}_{3}$ in the nitrating mixture used for nitration of benzene?
Answer:

The 1:1 solution of $\text {HNO}_{3}$ and $\text {H}_{2}\text {SO}_{4}$ is a nitrating mixture, and it is used for nitration of organic compounds. This mixture acts as a base which provides electrophile in the nitration process of benzene.

Question:39

Why is $\text {NH}_{2}$ group of aniline acetylated before carrying out nitration?
Answer:

The $\text {NH}_{2}$ group of aniline is acetylated before carrying out the nitration for controlling the nitration reaction, carry oxidation products and nitro derivative products formation.
As the acetyl group is an electron-withdrawing group, it attracts the lone pair of the electron in the N atom towards the carbonyl group.

Question:40

What is the product when $\text {C}_{6}\text {H}_{5}\text {CH}_{2}\text {NH}_{2}$ reacts with $\text {HNO}_{2}$ ?
Answer:

$\text {HNO}_{2}$ is reacted $\text {C}_{6}\text {H}_{5}\text {CH}_{2}\text {NH}_{2}$ which forms unstable diazonium salt, and in turn, alcohol is given out. This is the reaction:
$\text {C}_{6}\text {H}_{5}\text {CH}_{2}\text {NH}_{2}+\text {HNO}_{2}\rightarrow \text {C}_{6}\text {H}_{5}\text {CH}_{2}\text {OH}+\text {N}_{2}+\text {H}_{2}\text {O}$

Question:41

What is the best reagent to convert nitrile to primary amine?

Answer:

$\text {LiAlH}_{4}$ and Sodium/Alcohol are the best reagents for the conversion of nitrile to a primary amine. And nitriles can be converted into a corresponding primary amine using reduction.

Question:42

Give the structure of 'A' in the following reaction.

Answer:

3-Methylnitrobenzene is the product formed in the above reaction.

Question:43

What is Hinsberg reagent?

Answer:

$\text {C}_{6}\text {H}_{5}\text {SOCl}$ aka Benzene sulphonylchloride is known as Hinsberg's reagent. It is used to differentiate between primary, secondary and tertiary amines.

Question:44

Why is benzene diazonium chloride not stored and is used immediately after its preparation?
Answer:

Benzene Diazonium is very stable at low temperatures and highly soluble in water at high temperatures. It is recommended to use it immediately after its preparation as it is unstable.

Question:45

Why does the acetylation of $\text {-NH}_{2}$ group of aniline reduce its activating effect?
Answer:

The activating effect of $\text {-NH}_{2}$ group of aniline is reduced by its acetylation. It happens because of the lone pair electrons on the nitrogen of acetanilide react with oxygen atom because of resonance.

Question:46

Explain why $\text {MeNH}_{2}$ is a stronger base than $\text {MeOH}$ ?
Answer:

$\text {MeOH}$ is a weaker base than $\text {MeNH}_{2}$ because $\text {MeNH}_{2}$ has lower electronegativity and has lone pair electrons present on the nitrogen atom.

Question:47

What is the role of pyridine in the acylation reaction of amines?
Answer:

By acylation of $\text {-NH}_{2}$ group with acetic anhydride in the presence of pyridine and after that carrying substitution followed with hydrolysis of the substituted amide with the substituted amine, the activating effect of $\text {-NH}_{2}$ group can be controlled. $\text {HCl}$ is a side product, which is removed with the help of pyridine as a base.

Question:48

Under what reaction conditions (acidic/basic), the coupling reaction of aryldiazonium chloride with aniline is carried out?
Answer:

The reaction is performed in a mild basic medium and known as electrophilic substitution reaction. Aniline and Aryldiazonium chloride react to form a yellow dye of p-Aminoazobenzene.

Question:49

Predict the product of the reaction of aniline with bromine in a non-polar solvent such as $\text {CS}_{2}$ .
Answer:

When aniline and bromine react in a non-polar solvent, such as $\text {CS}_{2}$ , non-polar products are formed that are 4-Bromoaniline and 2-Bromoaniline in which 4-Bromoaniline is present in the majority.

Question:50

Arrange the following compounds in increasing order of dipole moment.
$\text {CH}_{3}\text {CH}_{2}\text {CH}_{3},\text {CH}_{3}\text {CH}_{2}\text {NH}_{2},\text {CH}_{3}\text {CH}_{2}\text {OH}$
Answer:

$\text {CH}_{3}\text {CH}_{2}\text {CH}_{3}<\text {CH}_{3}\text {CH}_{2}\text {NH}_{2}<\text {CH}_{3}\text {CH}_{2}\text {OH}$
$\text {CH}_{3}\text {CH}_{2}\text {OH}$ has dipole moment greater than $\text {CH}_{3}\text {CH}_{2}\text {NH}_{2}$ . Whereas, $\text {CH}_{3}\text {CH}_{2}\text {CH}_{3}$ has the least dipole moment amongst the three compounds. $\text {CH}_{3}\text {CH}_{2}\text {CH}_{3}$ is an almost non-polar molecule.

Question:51

What is the structure and IUPAC name of the compound, allyl amine?
Answer:

The structure of allyl amine is and its IUPAC name is prop-2-en-1-amine.

Question:52

Write down the IUPAC name of

Answer:

IUPAC name of N, N-Dimethylbenzenamine

Question:53

A compound Z with molecular formula $\text {C}_{3}\text {H}_{9}\text {N}$ reacts with $\text {C}_{6}\text {H}_{5}\text {SO}_{2}\text {Cl}$ to give a solid, insoluble in alkali, identify Z.
Answer:

Solid, insoluble alkali is given off when compound Z with molecular formula $\text {C}_{3}\text {H}_{9}\text {N}$ and is an aliphatic amine on treatment with $\text {C}_{6}\text {H}_{5}\text {SO}_{2}\text {Cl}$ . And hence, the product does not have any replaceable hydrogen on its nitrogen atom. The amine (Z) should be a secondary amine which means Z is ethyl methylamine $(\text {C}_{2}\text {H}_{5}\text {NHCH}_{3})$ .

Question:54

A primary amine, $\text {RNH}_{2}$ can be reacted with $\text {CH}_{3}-\text {X}$ to get secondary amine, $\text {RNHCH}_{3}$ , but the only disadvantage is that $3^{o}$ amine and quaternary ammonium salts are also obtained as side products. Can you suggest a method where $\text {RNH}_{2}$ forms only $2^{o}$ amine?
Answer:

$\\\text {R}-\text {NH}_{2}+\text {CHCl}_{3}+\text {3KOH}\rightarrow \text {R}-\text {NC}\xrightarrow[\text {(Reduction)}]{\text {H}_{2}/\text {Pd}}\text {R}-\text {NH}-\text {CH}_{3}\\\; 1^{o}\text {Amine}\; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \text {Alkyl isocyanide} \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; 2^{o}\text {Amine}$
Carbylamine reaction is shown by $1^{o}$ amine only which result in the replacement of two hydrogen atoms attached to N atom of $-\text {NH}_{2}$ group by one carbon atom to form isocyanide. On catalytic reduction, the isocyanide will give a secondary amine with one methyl group.

Question:55

Complete the following reaction.

Answer:

Question:56

Why is aniline soluble in aqueous $\text {HCl}$ ?
Answer:

Anilinium chloride salt is formed when aniline reacts with aqueous $\text {HCl}$ , and it is soluble in water.

Question:57

Suggest a route by which the following conversion can be accomplished.

Answer:

Question:58

Identify A and B in the following reaction.

Answer:

Question:59

How will you carry out the following conversions?
(i) toluene $\rightarrow$ p-toIuidine
(ii) p-toluidine diazonium chloride $\rightarrow$ p-toluic acid
Answer:

Question:60

Write the following conversions:
(i) nitrobenzene $\rightarrow$ acetanilide
(ii) acetanilide $\rightarrow$ p-nitroaniline
Answer:

Question:61

A solution contains 1 g mol each of p-toluene diazonium chloride and p-nitrophenyl diazonium chloride. To this 1 g mol of alkaline solution of phenol is added. Predict the major product. Explain your answer.
Answer:

This reaction is an example of electrophilic aromatic substitution. Phenol forms phenoxide ion in an alkaline medium, which is more electron-rich than phenol and therefore more reactive in the electrophilic attack. Arydiazonium cation is electrophile in this reaction, and p-Nitrophenyldiazonium cation is a stronger electrophile than p-toluene diazonium cation. Hence, it pairs preferentially with phenol.

Question:62

How will you bring out the following conversion?

Answer:

Question:63

How will you carry out the following conversion?

Answer:

Question:64

How will you carry out the following conversion?

Answer:

Question:65

How will you carry out the following conversion ?

Answer:

NCERT Exemplar Class 12 Chemistry Solutions Chapter 13: Matching Type

Question:66

Match the reactions given in Column I with the statements given in Column II.

Column I		Column II
(i)	Ammonolysis	(a)	Amine with lesser number of carbon atoms
(ii)	Gabriel phthalimide synthesis	(b)	Detection test for primary amines
(iii)	Hofmann Bromamide reaction	(c)	Reaction of phthalimide with $\text {KOH}$ and $\text {R-X}$
(iv)	Carbylamine reaction	(d)	Reaction of alkyl halides with $\text {NH}_{3}$

Apply to Aakash iACST Scholarship Test 2024

Applications for Admissions are open.

Apply Now

Answer:

(i $\rightarrow$ d), (ii $\rightarrow$ c), (iii $\rightarrow$ a), (iv $\rightarrow$ b)

Question:67

Match the compounds given in Column I with the items given in Column II.

Column I		Column II
(i)	Benzene sulphonyl Chloride	(a)	Zwitter ion
(ii)	Sulphanilic acid	(b)	Hinsberg reagent
(iii)	Alkyl diazonium salts	(c)	Dyes
(iv)	Aryl diazonium salts	(d)	Conversion to alcohols

Answer:

(i $\rightarrow$ b), (ii $\rightarrow$ a), (iii $\rightarrow$ d), (iv $\rightarrow$ c)

NCERT Exemplar Class 12 Chemistry Solutions Chapter 13: Assertion and Reason Type

Question:68

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices:
Assertion (A): Acylation of amines gives a monosubstituted product whereas alkylation of amines gives polysubstituted product.
Reason (R): Acyl group sterically hinders the approach of further acyl groups.
(i) Both assertion and reason are wrong.
(ii) Both assertion and reason are correct statements but reason is not correct explanation of assertion.
(iii) Assertion is correct statement but reason is wrong statement.
(iv) Both assertion and reason are correct statements and reason is correct explanation of assertion.
(v) Assertion is wrong statement but reason is correct statement.

Answer:

(iii) Assertion is correct statement but reason is wrong statement.

Question:69

In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices:
Assertion (A): Hoffmann's bromamide reaction is given by primary amines.
Reason (R): Primary amines are more basic than secondary amines.
(i) Both assertion and reason are wrong.
(ii) Both assertion and reason are correct statements but reason is not correct explanation of assertion.
(iii) Assertion is correct statement but reason is wrong statement.
(iv) Both assertion and reason are correct statements and reason is correct explanation of assertion.
(v) Assertion is wrong statement but reason is correct statement.
Answer:

(iii) Assertion is correct statement but reason is wrong statement.

Question:70

In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices:
Assertion (A): N-Ethylbenzene sulphonamide is soluble in alkali.
Reason (R): Hydrogen attached to nitrogen in sulphonamide is strongly acidic.
(i) Both assertion and reason are wrong.
(ii) Both assertion and reason are correct statements but reason is not correct explanation of assertion.
(iii) Assertion is correct statement but reason is wrong statement.
(iv) Both assertion and reason are correct statements and reason is correct explanation of assertion.
(v) Assertion is wrong statement but reason is correct statement.
Answer:

Ethylbenzene sulphonamide is soluble in alkali because it has acidic hydrogen.
Hence (iv) Both assertion and reason are correct statements and reason is correct explanation of assertion.

Question:71

In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices:
Assertion (A): N, N-diethyl benzene sulphonamide is insoluble in alkali.
Reason (R): Sulphonyl group attached to the nitrogen atom is a strong electron-withdrawing group.
(i) Both assertion and reason are wrong.
(ii) Both assertion and reason are correct statements but reason is not correct explanation of assertion.
(iii) Assertion is correct statement but reason is wrong statement.
(iv) Both assertion and reason are correct statements and reason is correct explanation of assertion.
(v) Assertion is wrong statement but reason is correct statement.
Answer:

N, N-diethyl benzene sulphonamide is not soluble in alkali as it there is no acidic hydrogen present on this. Sulphonyl group is an electron-withdrawing group which is attached to a nitrogen atom.
Hence, (ii) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Question:72

In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices:
Assertion (A): Only a small amount of $\text {HCl}$ is required in the reduction of nitro compounds with iron scrap and $\text {HCl}$ in the presence of steam.
Reason (R): $\text {FeCl}_{2}$ formed gets hydrolysed to release $\text {HCl}$ during the reaction.
(i) Both assertion and reason are wrong.
(ii) Both assertion and reason are correct statements but reason is not correct explanation of assertion.
(iii) Assertion is correct statement but reason is wrong statement.
(iv) Both assertion and reason are correct statements and reason is correct explanation of assertion.
(v) Assertion is wrong statement but reason is correct statement.
Answer:

$\text {Fe}+\text {2HCl}\rightarrow \text {FeCl}_{2}+\text {2[H]}$
Nacent hydrogen is reduced into nitro compounds.
$\text {FeCl}_{2}+\text {H}_{2}\text {O}\text {(g)}\rightarrow \text {FeO}+\text {2HCl}$
Hence, (iv) Both assertion and reason are correct statements and reason is correct explanation of assertion.

Question:73

In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices:
Assertion (A): Aromatic $1^{o}$ amines can be prepared by Gabriel phthalimide synthesis.
Reason (R): Aryl halides undergo nucleophilic substitution with anion formed by phthalimide.
(i) Both assertion and reason are wrong.
(ii) Both assertion and reason are correct statements but reason is not correct explanation of assertion.
(iii) Assertion is correct statement but reason is wrong statement.
(iv) Both assertion and reason are correct statements and reason is correct explanation of assertion.
(v) Assertion is wrong statement but reason is correct statement.
Answer:

(i) Both assertion and reason are wrong

Question:74

In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices:
Assertion (A): Acetanilide is less basic than aniline.
Reason (R): Acetylation of aniline results in the decrease of electron density on nitrogen.
(i) Both assertion and reason are wrong.
(ii) Both assertion and reason are correct statements but reason is not correct explanation of assertion.
(iii) Assertion is correct statement but reason is wrong statement.
(iv) Both assertion and reason are correct statements and reason is correct explanation of assertion.
(v) Assertion is wrong statement but reason is correct statement.
Answer:

(iv) Both assertion and reason are correct statements and reason is correct explanation of assertion.

NCERT Exemplar Class 12 Chemistry Solutions Chapter 13: Long Answer Type

Question:75

A hydrocarbon 'A', $\left ( \text {C}_{4}\text {H}_{8} \right )$ on reaction with $\text {HCl}$ gives a compound 'B' $\left ( \text {C}_{4}\text {H}_{9}\text {Cl} \right )$ , which on reaction with 1 mol of $\text {NH}_{3}$ gives compound 'C', $\left ( \text {C}_{4}\text {H}_{11}\text {N} \right )$ . On reacting with $\text {NaNO}_{2}$ and $\text {HCl}$ followed by treatment with water, compound 'C' yields optically active alcohol, 'D'. Ozonolysis of 'A' gives 2 moles of acetaldehyde. Identify compounds' A' to 'D'. Explain the reactions involved.
Answer:

(i) Addition of $\text {HCl}$ to compound 'A' shows that compound 'A' is alkene. Compound 'B' is $\text {C}_{4}\text {H}_{9}\text {Cl}$
(ii) Compound 'B' reacts with $\text {NH}_{2}$ , it forms amine 'C'.
$\\\text {C}_{4}\text {H}_{8}\overset{\text {HCl}}{\rightarrow}\text {C}_{4}\text {H}_{9}\text {Cl}\overset{\text {NH}_{3}}{\rightarrow}\text {C}_{4}\text {H}_{11}\text {N}\; \text {Or}\; \text {C}_{4}\text {H}_{9}\text {NH}_{2}\\\text {(A)}\; \; \; \; \; \; \; \; \; \; \; \; \text {(B)}\; \; \; \; \; \; \; \; \; \; \; \; \; \text {(C)}$
(iii) 'C' gives diazonium salt with $\text {NaNO}_{2}/\text {HCl}$ , which yields an optically active alcohol. So, 'C' is aliphatic amine.
(iv) 'A' on Ozonolysis produces 2 moles of $\text {CH}_{3}\text {CHO}.$ So, 'A' is $\text {CH}_{3}-\text {CH}=\text {CH}-\text {CH}_{3}\left ( \text {But-2-ene} \right )$
Reactions :

Question:76

A colourless substance 'A' $\left ( \text {C}_{6}\text {H}_{7}\text {N} \right )$ is sparingly soluble in water and gives a water-soluble compound 'B' on treating with a mineral acid. On reacting with $\text {CHCl}_{3}$ and alcoholic potash 'A' produces an obnoxious smell due to the formation of compound 'C'. The reaction of 'A' with benzene sulphonyl chloride gives compound 'D' which is soluble in alkali. With $\text {NaNO}_{2}$ and $\text {HCl}$ , 'A' forms compound 'E' which reacts with phenol in alkaline medium to give an orange dye 'F' Identify compounds' A' to 'F'.

Answer:

Question:77

Predict the reagent or the product in the following reaction sequence.

Answer:

Also, check - NCERT solutions for class 12, other subjects

The NCERT exemplar Class 12 Chemistry chapter 13 solutions given on this page would help you to prepare well for the 12 boards and competitive exams like NEET and JEE Main by brushing over the important concepts and, in turn, making revision easy . By Utilising the NCERT exemplar Class 12 Chemistry solutions chapter 13 pdf download function students can make learning even more convenient .

Main Subtopics of NCERT Exemplar Solutions for Class 12 Chemistry Chapter 13 Amines

Structure of Amines
Classification
Nomenclature
Preparation of Amines
Reduction of Nitro Compounds
Ammonolysis of Alkyl Halides
Reduction of nitrates
Reduction of Amides
Gabriel phthalimide synthesis
Hoffmann bromamide degradation reaction
Physical Properties
Chemical Reactions
Basic character of amines
Alkylation
Acylation
Carbylamine reaction
Reaction with nitrous acid
Reaction with aryl sulphonyl chloride
Electrophilic substitution
Method of Preparation of Diazonium Salts
Physical Properties
Chemical Reaction
Reactions involving the displacement of nitrogen
Reactions involving retention of the diazo group
Importance of Diazonium Salts in the synthesis of Aromatic Compounds

ALLEN NEET Coaching

Ace your NEET preparation with ALLEN Online Programs

Apply

Aakash iACST Scholarship Test 2024

Get up to 90% scholarship on NEET, JEE & Foundation courses

Apply

NCERT Exemplar Class 12 Chemistry Solutions Chapter 13 Amines - Learning Outcome

NCERT exemplar solutions for Class 12 Chemistry chapter 13 are completely authentic and will guide you in the right direction.
It helps in understanding the concepts of animes in an easy way. Animes are derivatives of ammonia, obtained by replacing the Hydrogen atom.
Detailed explanation can be found in the NCERT exemplar Class 12 Chemistry solutions chapter 13.

JEE Main Highest Scoring Chapters & Topics

Just Study 40% Syllabus and Score upto 100%

Download EBook

NCERT Exemplar Class 12 Chemistry Solutions

Chapter 1 Solid State

Chapter 2 Solutions

Chapter 3 Electrochemistry

Chapter 4 Chemical Kinetics

Chapter 5 Surface Chemistry

Chapter 6 General Principles and Processes of Isolation of Elements

Chapter 7 The p-Block Elements

Chapter 8 The d & f Block Elements

Chapter 9 Coordination Compounds

Chapter 10 Haloalkanes and Haloarenes

Chapter 11 Alcohols, Phenols, and Ethers

Chapter 12 Aldehydes, Ketones, and Carboxylic Acids

Chapter 14 Biomolecules

Chapter 15 Polymers

Chapter 16 Chemistry in Everyday Life

Important Topics Covered in NCERT Exemplar Solutions For Class 12 Chemistry Chapter 13

Class 12 Chemistry NCERT exemplar solutions chapter 13 has detailed that Structure of Amines, Classification, Nomenclature, Preparation, Physical Properties, Chemical Reactions are important topics which students should pay extra attention to.
NCERT exemplar Class 12 Chemistry chapter 13 solutions tries to explain all the chemical concepts by proper visualization in tables and structures to make understanding more comprehensible and easier.

PTE Exam 2024 Registrations

Apply

Resonance Coaching

Enroll in Resonance Coaching for success in JEE/NEET exams

Apply

NCERT Exemplar Class 12 Solutions

NCERT Exemplar Class 12 Mathematics Solutions

NCERT Exemplar Class 12 Physics Solutions

NCERT Exemplar Class 12 Biology Solutions

Check NCERT Solutions for Class 12 Chemistry

Chapter 1	The Solid State
Chapter 2	Solutions
Chapter 3	Electrochemistry
Chapter 4	Chemical Kinetics
Chapter 5	Surface chemistry
Chapter 6	General Principles and Processes of isolation of elements
Chapter 7	The P-block elements
Chapter 8	The d and f block elements
Chapter 9	Coordination compounds
Chapter 10	Haloalkanes and Haloarenes
Chapter 11	Alcohols, Phenols, and Ethers
Chapter 12	Aldehydes, Ketones and Carboxylic Acids
Chapter 13	Amines
Chapter 14	Biomolecules
Chapter 15	Polymers
Chapter 16	Chemistry in Everyday life

Must read NCERT Solution subject wise

Read more NCERT Notes subject wise

Also Check NCERT Books and NCERT Syllabus here:

Frequently Asked Question (FAQs)

1. 1. Why should one pay attention to this chapter and NCERT exemplar Class 12 Chemistry solutions chapter 13?

Class 12 Chemistry NCERT exemplar solutions chapter 13 covers the topic of amines which is a crucial part of organic chemistry. Those who are planning to take up engineering or biochemistry should not skip this chapter.

2. 2. How are these NCERT exemplar Class 12 Chemistry chapter 13 solutions helpful?

Students can make the most of these questions and NCERT exemplar solutions for Class 12 Chemistry chapter 13 by understanding the topic better and also these solutions will help in answering the questions asked in the exam.

3. 3. What all topics are included in this Class 12 Chemistry NCERT exemplar solutions chapter 13?

The entire chapter covers the topic of amines, its properties, types, classification, applications and uses, and the chemical reactions.

4. 4. Are these NCERT exemplar Class 12 Chemistry solutions chapter 13 useful in board exams?

- Yes, these NCERT exemplar Class 12 Chemistry chapter 13 Solutions are helpful for board exams as they help in understanding topics better and also in learning the pattern of the paper.

Also Read

NCERT Class 12 Physics Chapter 9 Notes Ray Optics and Optical Instruments - Download PDF

NCERT Class 12 Physics Chapter 8 Notes Electromagnetic Waves - Download PDF

NCERT Class 12 Physics Chapter 7 Notes Alternating Current - Download PDF

NCERT Class 12 Physics Chapter 6 Notes Electromagnetic Induction - Download PDF

NCERT Class 12 Physics Chapter 5 Notes Magnetism and Matter - Download PDF

NCERT Class 12 Physics Chapter 4 Notes Moving Charges and Magnetism - Download PDF

NCERT Books for Class 12 Hindi 2024 - Download chapter wise PDFs here

NCERT Books for Class 12 Biology 2024 - Download Free PDF

NCERT Books for Class 12 Chemistry 2024 - Download Free Pdf

NCERT Book for Class 12 Maths 2024 - Download Free PDF

NCERT Book for Class 12 Physics 2024 - Download Free PDF

NCERT Books for Class 12 - Download All Subjects PDFs Here

NCERT Syllabus for Class 12 English 2024 - Download Syllabus PDF

NCERT Syllabus for Class 12 2024 (All Subjects) - Download PDF Here

NCERT Syllabus for Class 6 to 12 (2023-24) - All Subjects PDF Download

NCERT Solutions for Miscellaneous Exercise Chapter 7 Class 12 - Integrals

NCERT Solutions for Exercise 4.1 Class 11 Maths Chapter 4 - Principle of Mathematical Induction

NCERT Solutions for Class 12 Biology - Check CBSE 12 Biology NCERT Chapterwise Solution

NCERT Solutions for Class 12 Maths Chapter 11 Three Dimensional Geometry

NCERT Solutions for Class 12

NCERT Solutions for Class 12 Maths (Updated 2023-24)

NCERT Exemplar Class 12 Physics Solutions Chapter 8 Electromagnetic Waves

Articles

WB West Bengal Board Result 2024- Check WB Madhyamik and WB HS Result @wbresults.nic.in

Apr 26, 2024

NBSE Result 2024 OUT, Nagaland Board Class 10, 12 Result @nbsenl.edu.in

Apr 26, 2024

NBSE HSSLC Result 2024 OUT @nbsenl.edu.in, Check Nagaland Board Class 12 Result

Apr 26, 2024

NBSE HSSLC Toppers 2024 - Check Toppers List, Rank, Marks Here

Apr 26, 2024

NBSE Board - Full Form, Official Website, Exam Dates, Syllabus, Results

Apr 26, 2024

CBSE 12th Result 2024 Link, Date, Website - CBSE Board Class 12th Result at cbseresults.nic.in

Apr 23, 2024

CBSE Result DigiLocker 2024 - Download 10th, 12th Result via DigiLocker Login, Passing & Migration Certificate

Apr 23, 2024

5 min ⋆ Sep 28, 2023

Study Help

Cancer Treatment: Why Chemotherapy Does Not Suit All Patients

Result

Mock Test

View All School Exams

Certifications By Top Providers

Artificial Intelligence Projects

Via Great Learning

Introduction to Web Development with HTML CSS JavaScript

Via IBM

Introduction to Watson AI

Via IBM

Full-Stack Web Development

Via Masai School

Introduction to Data Science

Via IBM

Cybersecurity Roles and Operating System Security

Via IBM

1111 courses

788 courses

327 courses

141 courses

Harvard University, Cambridge

98 courses

IBM

85 courses

IT & Software

Teaching and Academics

Programming and Development

Health, Fitness and Medicine

Business and Management

Engineering and Architecture

General Management

Financial Management

History

Environmental Studies

Psychology

Data Science

Explore Top Universities Across Globe

University of Essex, Colchester

Wivenhoe Park Colchester CO4 3SQ

University College London, London

Gower Street, London, WC1E 6BT

The University of Edinburgh, Edinburgh

Old College, South Bridge, Edinburgh, Post Code EH8 9YL

University of Bristol, Bristol

Beacon House, Queens Road, Bristol, BS8 1QU

University of Nottingham, Nottingham

University Park, Nottingham NG7 2RD

Lancaster University, Lancaster

Bailrigg, Lancaster LA1 4YW

Top Benefits of Studying in New Zealand 2024 - Low Cost, Top Universities, Visa Free Travel, Job Opportunities

6 min ⋆ Mar 01, 2024 12:03 PM IST

Top MBBS Colleges in Asian Countries - Course Details, Tuition Fees, Eligibility

5 min ⋆ Mar 01, 2024 11:03 AM IST

Countries to Study Abroad for Indians other than Canada

6 min ⋆ Feb 28, 2024 07:02 AM IST

TOEFL Reading Section: Strategies for Effective Preparation

5 min ⋆ Mar 01, 2024 10:03 AM IST

TOEFL Preparation Time 2024: How To Prepare For TOEFL?

4 min ⋆ Mar 01, 2024 10:03 AM IST

IELTS General Training Preparation 2024 - Tips, Strategies & Practice

5 min ⋆ Mar 01, 2024 06:03 AM IST

Related E-books & Sample Papers

CBSE Class 11, 12 Physics Syllabus 2024-25

235+ Downloads

CBSE Class 11, 12 Economics Syllabus 2024-25

77+ Downloads

CBSE Class 11, 12 Sociology Syllabus 2024-25

108+ Downloads

CBSE Class 11, 12 Sanskrit (Elective) Syllabus 2024-25

31+ Downloads

CBSE Class 11, 12 Sanskrit (Core) Syllabus 2024-25

9+ Downloads

CBSE Class 11, 12 Psychology Syllabus 2024-25

35+ Downloads

Questions related to CBSE Class 12th

Have a question related to CBSE Class 12th ?

I am interested in graphic designing and coding. how do I make a career .which stream should I go.what engineering subject to take

Hello aspirant,

The purpose of graphic design extends beyond the brand's look. Nevertheless, by conveying what the brand stands for, it significantly aids in the development of a sense of understanding between a company and its audience. The future in the field of graphic designing is very promising.

There are various courses available for graphic designing. To know more information about these courses and much more details, you can visit our website by clicking on the link given below.

https://www.careers360.com/courses/graphic-designing-course

Thank you

Hope this information helps you.

Read Complete Answer

Sajal Trivedi 29 January,2024

i couldn't clear 1st compartment (which held in August 2022) cbse class 12th so can I give improvement in all subjects which to be held on March 2023. tell me a solution i need more than 75% in class 12th

hello,

Yes you can appear for the compartment paper again since CBSE gives three chances to a candidate to clear his/her exams so you still have two more attempts. However, you can appear for your improvement paper for all subjects but you cannot appear for the ones in which you have failed.

I hope this was helpful!

Good Luck

Read Complete Answer

Upasana Barman 24 August,2022

i was not able to clear 1st compartment and now I have to give 2nd compartment so can I give improvement exam next year? plz tell me very much tensed(cbse class 12th)

Hello dear,

If you was not able to clear 1st compartment and now you giving second compartment so YES, you can go for your improvement exam next year but if a student receives an improvement, they are given the opportunity to retake the boards as a private candidate the following year, but there are some requirements. First, the student must pass all of their subjects; if they received a compartment in any subject, they must then pass the compartment exam before being eligible for the improvement.

As you can registered yourself as private candidate for giving your improvement exam of 12 standard CBSE(Central Board of Secondary Education).For that you have to wait for a whole year which is bit difficult for you.

Positive side of waiting for whole year is you have a whole year to preparing yourself for your examination. You have no distraction or something which may causes your failure in the exams. In whole year you have to stay focused on your 12 standard examination for doing well in it. By this you get a highest marks as a comparison of others.

Believe in Yourself! You can make anything happen

All the very best.

Read Complete Answer

Mayankjha.student2007 23 August,2022

if i am giving improvement in one subject this year, will i be able to give improvement in more subjects next year?

Hello Student,

I appreciate your Interest in education. See the improvement is not restricted to one subject or multiple subjects and we cannot say if improvement in one subject in one year leads to improvement in more subjects in coming year.

You just need to have a revision of all subjects what you have completed in the school. have a revision and practice of subjects and concepts helps you better.

All the best.

Read Complete Answer

Nuthalapati Vyshnavi 21 August,2022

I got an RT for 2 subjects, so do I have to give exams for all the subjects in the coming year or just the 2. pls help me

Hi,

You just need to give the exams for the concerned two subjects in which you have got RT. There is no need to give exam for all of your subjects, you can just fill the form for the two subjects only.

Read Complete Answer

Muskan Dhalwal 17 August,2022

View All

Popular CBSE Class 12th Questions

A block of mass 0.50 kg is moving with a speed of 2.00 ms^-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

Option 1) $0.34\; J$	Option 2) $0.16\; J$
Option 3) $1.00\; J$	Option 4) $0.67\; J$

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times. Assume that the potential energy lost each time he lowers the mass is dissipated. How much fat will he use up considering the work done only when the weight is lifted up ? Fat supplies 3.8×10⁷J of energy per kg which is converted to mechanical energy with a 20% efficiency rate. Take g = 9.8 ms⁻² :

Option 1)

2.45×10⁻³ kg

Option 2)

6.45×10⁻³ kg

Option 3)

9.89×10⁻³ kg

Option 4)

12.89×10⁻³ kg

An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

Option 1) $2,000 \; J - 5,000\; J$	Option 2) $200 \, \, J - 500 \, \, J$
Option 3) $2\times 10^{5}J-3\times 10^{5}J$	Option 4) $20,000 \, \, J - 50,000 \, \, J$

A particle is projected at 60⁰ to the horizontal with a kinetic energy $K$ . The kinetic energy at the highest point

Option 1) $K/2\,$	Option 2) $\; K\;$
Option 3) $zero\;$	Option 4) $K/4$

In the reaction,

$2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}$

Option 1) $11.2\, L\, H_{2(g)}$ at STP is produced for every mole $HCL_{(aq)}$ consumed	Option 2) $6L\, HCl_{(aq)}$ is consumed for ever $3L\, H_{2(g)}$ produced
Option 3) $33.6 L\, H_{2(g)}$ is produced regardless of temperature and pressure for every mole Al that reacts	Option 4) $67.2\, L\, H_{2(g)}$ at STP is produced for every mole Al that reacts .

How many moles of magnesium phosphate, $Mg_{3}(PO_{4})_{2}$ will contain 0.25 mole of oxygen atoms?

Option 1) 0.02	Option 2) 3.125 × 10^-2
Option 3) 1.25 × 10^-2	Option 4) 2.5 × 10^-2

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

Option 1) decrease twice	Option 2) increase two fold
Option 3) remain unchanged	Option 4) be a function of the molecular mass of the substance.

With increase of temperature, which of these changes?

Option 1) Molality	Option 2) Weight fraction of solute
Option 3) Fraction of solute present in water	Option 4) Mole fraction.

Number of atoms in 558.5 gram Fe (at. wt.of Fe = 55.85 g mol^-1) is

Option 1) twice that in 60 g carbon	Option 2) 6.023 × 10²²
Option 3) half that in 8 g He	Option 4) 558.5 × 6.023 × 10²³

A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t²) newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m² , the number of rotations made by the pulley before its direction of motion if reversed, is

Option 1) less than 3	Option 2) more than 3 but less than 6
Option 3) more than 6 but less than 9	Option 4) more than 9

Data Administrator

Database professionals use software to store and organise data such as financial information, and customer shipping records. Individuals who opt for a career as data administrators ensure that data is available for users and secured from unauthorised sales. DB administrators may work in various types of industries. It may involve computer systems design, service firms, insurance companies, banks and hospitals.

4 Jobs Available

Bio Medical Engineer

The field of biomedical engineering opens up a universe of expert chances. An Individual in the biomedical engineering career path work in the field of engineering as well as medicine, in order to find out solutions to common problems of the two fields. The biomedical engineering job opportunities are to collaborate with doctors and researchers to develop medical systems, equipment, or devices that can solve clinical problems. Here we will be discussing jobs after biomedical engineering, how to get a job in biomedical engineering, biomedical engineering scope, and salary.

4 Jobs Available

Ethical Hacker

A career as ethical hacker involves various challenges and provides lucrative opportunities in the digital era where every giant business and startup owns its cyberspace on the world wide web. Individuals in the ethical hacker career path try to find the vulnerabilities in the cyber system to get its authority. If he or she succeeds in it then he or she gets its illegal authority. Individuals in the ethical hacker career path then steal information or delete the file that could affect the business, functioning, or services of the organization.

3 Jobs Available

GIS Expert

GIS officer work on various GIS software to conduct a study and gather spatial and non-spatial information. GIS experts update the GIS data and maintain it. The databases include aerial or satellite imagery, latitudinal and longitudinal coordinates, and manually digitized images of maps. In a career as GIS expert, one is responsible for creating online and mobile maps.

3 Jobs Available

Data Analyst

The invention of the database has given fresh breath to the people involved in the data analytics career path. Analysis refers to splitting up a whole into its individual components for individual analysis. Data analysis is a method through which raw data are processed and transformed into information that would be beneficial for user strategic thinking.

Data are collected and examined to respond to questions, evaluate hypotheses or contradict theories. It is a tool for analyzing, transforming, modeling, and arranging data with useful knowledge, to assist in decision-making and methods, encompassing various strategies, and is used in different fields of business, research, and social science.

3 Jobs Available

Geothermal Engineer

Individuals who opt for a career as geothermal engineers are the professionals involved in the processing of geothermal energy. The responsibilities of geothermal engineers may vary depending on the workplace location. Those who work in fields design facilities to process and distribute geothermal energy. They oversee the functioning of machinery used in the field.

3 Jobs Available

Database Architect

If you are intrigued by the programming world and are interested in developing communications networks then a career as database architect may be a good option for you. Data architect roles and responsibilities include building design models for data communication networks. Wide Area Networks (WANs), local area networks (LANs), and intranets are included in the database networks. It is expected that database architects will have in-depth knowledge of a company's business to develop a network to fulfil the requirements of the organisation. Stay tuned as we look at the larger picture and give you more information on what is db architecture, why you should pursue database architecture, what to expect from such a degree and what your job opportunities will be after graduation. Here, we will be discussing how to become a data architect. Students can visit NIT Trichy, IIT Kharagpur, JMI New Delhi.

3 Jobs Available

Remote Sensing Technician

Individuals who opt for a career as a remote sensing technician possess unique personalities. Remote sensing analysts seem to be rational human beings, they are strong, independent, persistent, sincere, realistic and resourceful. Some of them are analytical as well, which means they are intelligent, introspective and inquisitive.

Remote sensing scientists use remote sensing technology to support scientists in fields such as community planning, flight planning or the management of natural resources. Analysing data collected from aircraft, satellites or ground-based platforms using statistical analysis software, image analysis software or Geographic Information Systems (GIS) is a significant part of their work. Do you want to learn how to become remote sensing technician? There's no need to be concerned; we've devised a simple remote sensing technician career path for you. Scroll through the pages and read.

3 Jobs Available

Budget Analyst

Budget analysis, in a nutshell, entails thoroughly analyzing the details of a financial budget. The budget analysis aims to better understand and manage revenue. Budget analysts assist in the achievement of financial targets, the preservation of profitability, and the pursuit of long-term growth for a business. Budget analysts generally have a bachelor's degree in accounting, finance, economics, or a closely related field. Knowledge of Financial Management is of prime importance in this career.

4 Jobs Available

Data Analyst

3 Jobs Available

Underwriter

An underwriter is a person who assesses and evaluates the risk of insurance in his or her field like mortgage, loan, health policy, investment, and so on and so forth. The underwriter career path does involve risks as analysing the risks means finding out if there is a way for the insurance underwriter jobs to recover the money from its clients. If the risk turns out to be too much for the company then in the future it is an underwriter who will be held accountable for it. Therefore, one must carry out his or her job with a lot of attention and diligence.

3 Jobs Available

5 Jobs Available

The word “choreography" actually comes from Greek words that mean “dance writing." Individuals who opt for a career as a choreographer create and direct original dances, in addition to developing interpretations of existing dances. A Choreographer dances and utilises his or her creativity in other aspects of dance performance. For example, he or she may work with the music director to select music or collaborate with other famous choreographers to enhance such performance elements as lighting, costume and set design.

2 Jobs Available

A multimedia specialist is a media professional who creates, audio, videos, graphic image files, computer animations for multimedia applications. He or she is responsible for planning, producing, and maintaining websites and applications.

2 Jobs Available

Welding Engineer

5 Jobs Available

QA Manager

4 Jobs Available

Quality Controller

A quality controller plays a crucial role in an organisation. He or she is responsible for performing quality checks on manufactured products. He or she identifies the defects in a product and rejects the product.

A quality controller records detailed information about products with defects and sends it to the supervisor or plant manager to take necessary actions to improve the production process.

3 Jobs Available

An AWS Solution Architect is someone who specializes in developing and implementing cloud computing systems. He or she has a good understanding of the various aspects of cloud computing and can confidently deploy and manage their systems. He or she troubleshoots the issues and evaluates the risk from the third party.

4 Jobs Available

Azure Administrator

An Azure Administrator is a professional responsible for implementing, monitoring, and maintaining Azure Solutions. He or she manages cloud infrastructure service instances and various cloud servers as well as sets up public and private cloud systems.