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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
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Question:1
Which of the following is a 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 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)
(ii)
(iii)
(iv)
Answer:
Option (iii) is the correct answer.
Explanation: is a amine and is a amine, therefore is more basic than . And because of –I effect of CN group, is less basic than . Moreover, is the least basic and less basic than and ; 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:
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 s the weakest base.
Question:5
Benzylamine may be alkylated, as shown in the following equation:
Which of the following alkyl halides is best suited for this reaction through mechanism?
(i)
(ii)
(iii)
(iv)
Answer:
Option (iii) is the correct answer.
Explanation: is a two-step reaction. At first, 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 reactions.
Question:6
Which of the following reagents would not be a good choice for reducing an aryl nitro compound to an amine?
(i) (excess)/Pt
(ii) in ether
(iii) and
(iv) and
Answer:
Option (ii) is the correct answer.
Explanation: Using 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 group in the carbon chain, the reagent used as source of nitrogen is ___________.
(i) Sodium amide,
(ii) Sodium azide,
(iii) Potassium cyanide,
(iv) Potassium phthalimide,
Answer:
Option (iii) is the correct answer.
Explanation: The number of carbon atoms increases with the help of
Question:8
The source of nitrogen in Gabriel synthesis of amines is _____________.
(i) Sodium azide,
(ii) Sodium nitrite,
(iii) Potassium cyanide,
(iv) Potassium phthalimide,
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°
(ii) 2° followed by
(iii) 1° followed by
(iv) 1° potassium phthalimide followed by /heat
Answer:
Option (iii) is the correct answer.
Question:10
The best reagent for converting 2–phenylpropanamide into 2-phenylpropanamine is _____.
(i) excess
(ii) in aqueous
(iii) iodine in the presence of red phosphorus
(iv) in ether
Answer:
Option (iv) is the correct answer.
Question:11
The best reagent for converting, 2-phenylpropanamide into 1- phenylethanamine is ____.
(i) excess
(ii)
(iii) /methanol
(iv) /ether
Answer:
Option (ii) is the correct answer.
Question:12
Hoffmann Bromamide Degradation reaction is shown by __________.
(i)
(ii)
(iii)
(iv)
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 to form _________.
(i)
(ii)
(iii)
(iv)
Answer:
Option (iii) is the correct answer.
Explaination :
Question:15
The gas evolved when methylamine reacts with nitrous acid is __________.
(i)
(ii)
(iii)
(iv)
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. and conc. , the species which initiates the reaction is __________.
(i)
(ii)
(iii)
(iv)
Answer:
Option (iii) is the correct answer.
Explanation: The process of nitration is initiated by (Nitronium Ion) electrophile. It is then obtained as:
Question:17
Reduction of aromatic nitro compounds using 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 is more if the strength of the base is more. Therefore, 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:
N-Ethylacetamide
Question:20
The reaction 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
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; . The compounds should not contain electron withdrawing groups like: , 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: 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 _______.
Answer:
Option (i) is the correct answer.
Explanation: The electronegativity of is more than atom; therefore, bond is more polar than bond. Therefore, is more acidic than the bond. and , both have a negative charge, and because of that, they are more basic than and .
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 .
(ii) The reaction of the amide with 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.
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 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)
(ii)
(iii)
(iv)
Answer:
Option (i), (ii) and (iii) are the correct answers.
Question:30
Which of the following species are involved in the carbylamine test?
(i)
(ii)
(iii)
(iv)
Answer:
Option (i) and (ii) are the correct answers.
Explanation: Amine when reacts with a mixture of and gives out alkyl isocyanate. This reaction is called a Carbylamine reaction.
Here, Only and are involved in carbylamine reaction.
Question:31
The reagents that can be used to convert benzene diazonium chloride to benzene are __________.
(i)
(ii)
(iii)
(iv)
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.
Answer:
Option (i) and (ii) are the correct answers.
Explanation: and are the primary aliphatic amines that can be prepared by Gabriel synthesis. amines are and amine, 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 :
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
(ii) Acetic anhydride/pyridine followed by
(iii) Dil. HCl followed by reaction with
(iv) Reaction with
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 atoms are replaced by acyl groups is known as Acylation. Diazotisation is also a type of nucleophilic substitution reaction.
Question:38
What is the role of in the nitrating mixture used for nitration of benzene?
Answer:
The 1:1 solution of and 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 group of aniline acetylated before carrying out nitration?
Answer:
The 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 reacts with ?
Answer:
is reacted which forms unstable diazonium salt, and in turn, alcohol is given out. This is the reaction:
Question:41
What is the best reagent to convert nitrile to primary amine?
Answer:
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
Answer:
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 group of aniline reduce its activating effect?
Answer:
The activating effect of 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 is a stronger base than ?
Answer:
is a weaker base than because 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 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 group can be controlled. is a side product, which is removed with the help of pyridine as a base.
Question:48
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 .
Answer:
When aniline and bromine react in a non-polar solvent, such as , 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.
Answer:
has dipole moment greater than . Whereas, has the least dipole moment amongst the three compounds. 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:53
A compound Z with molecular formula reacts with to give a solid, insoluble in alkali, identify Z.
Answer:
Solid, insoluble alkali is given off when compound Z with molecular formula and is an aliphatic amine on treatment with . 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 .
Question:54
Carbylamine reaction is shown by amine only which result in the replacement of two hydrogen atoms attached to N atom of group by one carbon atom to form isocyanide. On catalytic reduction, the isocyanide will give a secondary amine with one methyl group.
Question:56
Why is aniline soluble in aqueous ?
Answer:
Anilinium chloride salt is formed when aniline reacts with aqueous , and it is soluble in water.
Question:57
Suggest a route by which the following conversion can be accomplished.
Answer:
Question:58
Question:61
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
Question:63
Question:65
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 and |
(iv) | Carbylamine reaction | (d) | Reaction of alkyl halides with |
Answer:
(i d), (ii c), (iii a), (iv 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 b), (ii a), (iii d), (iv c)
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 is required in the reduction of nitro compounds with iron scrap and in the presence of steam.
Reason (R): formed gets hydrolysed to release 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:
Nacent hydrogen is reduced into nitro compounds.
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 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.
Question:75
(i) Addition of to compound 'A' shows that compound 'A' is alkene. Compound 'B' is
(ii) Compound 'B' reacts with , it forms amine 'C'.
(iii) 'C' gives diazonium salt with , which yields an optically active alcohol. So, 'C' is aliphatic amine.
(iv) 'A' on Ozonolysis produces 2 moles of So, 'A' is
Reactions :
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 .
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.
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.
Chapter 1 | |
Chapter 2 | |
Chapter 3 | |
Chapter 4 | |
Chapter 5 | |
Chapter 6 | |
Chapter 7 | |
Chapter 8 | |
Chapter 9 | |
Chapter 10 | |
Chapter 11 | |
Chapter 12 | |
Chapter 13 | Amines |
Chapter 14 | |
Chapter 15 | |
Chapter 16 |
Must read NCERT Solution subject wise
Read more NCERT Notes subject wise
Also Check NCERT Books and NCERT Syllabus here:
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.
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.
The entire chapter covers the topic of amines, its properties, types, classification, applications and uses, and the chemical reactions.
- 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.
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Hello there! Thanks for reaching out to us at Careers360.
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If you have uploaded screenshot of your 12th board result taken from CBSE official website,there won,t be a problem with that.If the screenshot that you have uploaded is clear and legible. It should display your name, roll number, marks obtained, and any other relevant details in a readable forma.ALSO, the screenshot clearly show it is from the official CBSE results portal.
hope this helps.
Hello Akash,
If you are looking for important questions of class 12th then I would like to suggest you to go with previous year questions of that particular board. You can go with last 5-10 years of PYQs so and after going through all the questions you will have a clear idea about the type and level of questions that are being asked and it will help you to boost your class 12th board preparation.
You can get the Previous Year Questions (PYQs) on the official website of the respective board.
I hope this answer helps you. If you have more queries then feel free to share your questions with us we will be happy to assist you.
Thank you and wishing you all the best for your bright future.
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