Careers360 Logo
NCERT solutions for class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements

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 solutions for class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements

Edited By Apoorva Singh | Updated on Aug 16, 2022 12:18 PM IST | #CBSE Class 12th

NCERT Solutions for Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements - Students appearing in Class 12 board exams must refer to this NCERT Chemistry Class 12 chapter 6 to score well in the examination. To develop a grip on every topic you must solve topic wise questions and exercise questions of NCERT book Cass 12 Chemistry chapter 6. The NCERT solutions for Class 12 Chemistry chapter 6 General Principles and Processes of Isolation of Elements are prepared by subject experts to help students in clarifying their doubts.

NCERT solutions for class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements
NCERT solutions for class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements

Also, the NCERT solutions for other classes and subjects can assist you in your preparation. By referring to the NCERT, students can understand all the important concepts and practice questions well enough before their examination.

Also Read :

Find NCERT Solutions for Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements Below:

Solutions to In Text Questions Ex 6.1 to 6.4

Question 6.1 Which of the ores mentioned in Table 6.1 can be concentrated by magnetic separation method?

Table 6.1: Principle Ores of some Important Metals

Metal Ores Composition
Aluminium Bauxite

Kaolinite(a form of clay)
AlO x (OH) 3-2x
[Where 0<x<1]
[Al 2 (OH) 4 Si 2 O 5 ]
Iron Haemtite
Magnetite
Siderite
Iron pyrites
Fe 2 O 3
Fe 3 O 4
FeCO 3
FeS 2
Copper Copper pyrites
Melachite
Cuprite
Copper glance
CuFeS 2
CuCO 3 .Cu(OH) 2
Cu 2 O
Cu 2 S
Zinc Zinc blande or Sphalerite
Calamine
Zincite
ZnS
ZnCO 3
ZnO

Answer :

Ores which contains some magnetic particles or they can attract by the magnetic field only they can be concentrated by magnetic separation method. Among the ores mentioned in table 6.1, the ores of iron such as haematite (Fe_{2}O_{3}) , magnetite (Fe_{3}O_{4}) , siderite (FeCO_{3}) , and iron pyrites (FeS_{2}) can be separated by the process of magnetic separation

Question 6.2 What is the significance of leaching in the extraction of aluminium?

Answer :

In the extraction of aluminium, the significance of leaching is to concentrate the pure alumina ( Al_{2}O_{3} ) from bauxite ore.

\\Al_{2}O_{3}(s)+2NaOH(aq)+3H_{2}O\rightarrow 2Na[Al(OH)_{4}](aq)\\ SiO_{2}(l)+2NaOH(aq)\rightarrow NaSiO_{3}(aq)+H_{2}O

Impurities are then filtered and the solution is neutralized by carbon dioxide gas

2Na[Al(OH)_{4}](aq)+CO_{2}(g)\rightarrow Al_{2}O_{3}.xH_{2}O(s)+2NaHCO_{3}(aq)

(hydrated alumina)

Al_{2}O_{3}.xH_{2}O(s)\overset{\Delta }{\rightarrow} Al_{2}O_{3}+xH_{2}O

Question 6.3 The reaction, Cr_2 O_3 + 2 AI \rightarrow Al_2 O_3 + 2 Cr (\Delta G^{o} = - 421 kJ) is thermodynamically feasible as is apparent from the Gibbs energy value. Why does it not take place at room temperature?

Answer :

Cr_2 O_3 + 2 AI \rightarrow Al_2 O_3 + 2 Cr
This reaction is thermodynamically feasible, but it does not take place in room temperature because at room temperature all the reactants are solids. At high temperature, the chromiums start melting and the reaction becomes faster.

Question 6.4 Is it true that under certain conditions, Mg can reduce Al2O3 and Al can reduce MgO? What are those conditions ?

Answer :

Yes, temperature below 1623K, Mg can reduce Al_{2}O_{3} to Al and temperature above 1623K Aluminium can reduce MgO to Mg

NCERT Solutions for Class 12 Chemistry Chapter 6 General Principles and Processes of Ssolation of Elements- Exercise Questions

Question 6.1 Copper can be extracted by hydrometallurgy but not zinc. Explain.

Answer :

Copper can be extracted by hydrometallurgy but not zinc because the reduction potential of zinc is lower than that of copper. So, that copper can be reduced from its solution by zinc.

Zn(s)+Cu^{2+}(aq)\rightarrow Zn^{2+}(aq)+Cu(s)

But to reduce zinc from its solution we need higher reactive metal, which reduction potential is lower than zinc like Al,Mg,Ca,K But these metals readily react with water with the evolution of H_{2} gas. As a result, these metals are cannot use to displace zinc ion from its solution.

2K(s)+2H_{2}O(l)\rightarrow KOH(aq)+H_{2}(g)

Question 6.2 What is the role of depressant in froth floatation process?

Answer :

Role of depressant in froth flotation method is to separate two sulphid ores by adjusting one ore to form froth. For example- NaCN is used as a depressant it selectively prevents ZnS to coming to the froth but allows PbS with the froth. NaCN react with ZnS to form Na_{2}[Zn(CN)_{4}]

Reaction-

4NaCN+ ZnS\rightarrow Na_{2}[Zn(CN)_{4}]+ Na_{2}S

Question 6.3 Why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction?

Answer :

Gibbs free energy of formation (\Delta _{f}G^{0}) of Cu_{2}S is less than that of H_{2}S and CS_{2} so that hydrogen and carbon are unable to reduce

Cu_{2}S \rightarrow Cu . But the Gibbs free energy of formation (\Delta _{f}G^{0}) of Cu_{2}O is higher than that of CO. So, that carbon can able to reduce

Cu_{2}O \rightarrow Cu . Therefore the extraction of copper from its pyrite ore is more difficult than its oxide ore through reduction.

Question 6.4 Explain: (i) Zone refining

Answer :

ZONE REFINING- This method is based on that the impurities are more soluble in the molten state than n the solid state. In this process, a circular mobile heater surrounding the rod of impure metal is fixed at one end. Move the heater from one end to another end so that the impurities present in the rod also moves to the other end of the rod. Repeat the process several times again and again. Impurities get concentrated at separate ends of the rod. This end is cut off.

15948162165371594816214522

Question 6.4 Explain: (ii)Column chromatography.

Answer :

Column chromatography-
The principle of chromatography is based on, the different component of the mixture is getting adsorbed to a different extent on an adsorbent. In this, there are two phases one is mobile and the other is immobile phase. In column chromatography, Al_{2}O_{3} column is generally used as a stationary phase. The mobile phase is may be a gas or liquid. The mobile phase is forced to move over the stationary phase. The adsorbed component is removed with the help of a suitable solvent.
15948162340271594816231986


Question 6.5 Out of C and CO, which is a better reducing agent at 673 K ?

Answer :

At 673K (\Delta G^{0}) for change of (CO\rightarrow CO_{2}) is less than (\Delta G^{0}) of (C\rightarrow CO) . Therefore CO can easily oxidized to CO_{2} than C to CO.

Hence CO is better reducing agent than C at 673K.

Question 6.6 Name the common elements present in the anode mud in electrolytic refining of copper. Why are they so present?

Answer :

The following elements present in the anode mud in electrolytic refining of copper are selenium, silver, tellurium, gold, platinum and antimony. They are present because they are very less reactive and are not affected by the purification process. So, therefore they settle down below as anode mud.

Question 6.7 Write down the reactions taking place in different zones in the blast furnace during the extraction of iron.

Answer :

At 500-800K

\\3Fe_{2}O_{3}+CO\rightarrow 2Fe_{3}O_{4}+CO_{2}\\ Fe_{3}O_{4}+CO\rightarrow 3Fe+4CO_{2}\\ Fe_{2}O_{3}+CO\rightarrow 2FeO+CO_{2}

limestone also decomposes to calcium oxide which reverses silicate impurity of the ore as slag CaCO_{3}\rightarrow CaO+CO_{2}

At 900-1500K

\\C+CO_{2}\rightarrow 2CO\\ FeO+CO\rightarrow Fe+CO_{2}

CaO+SiO_{2}\rightarrow CaSiO_{3}(slag)

Question 6.8 Write chemical reactions taking place in the extraction of zinc from zinc blende.

Answer :

Chemical reactions in the extraction of zinc from zinc blende -

After concentration of ore (removal of gauge from zinc blend ( ZnS ) by froth floatation method).

Conversion to the oxide b y the roasting method -

2ZnS+3O_{2}\rightarrow ZnO+2SO_{2}

Extraction of zinc from zinc oxide (by reduction)

ZnO+C\overset{673K}{\rightarrow}Zn+CO

Electrolytic refining of impure zinc (electrolyte used is acidified zinc sulphate ZnSO_{4} )

Anode- Zn\rightarrow Zn^{2+}+2e^{-}

Cathode (made of the pure copper strip)- Zn^{2+}+2e^{-}\rightarrow Zn

Question 6.9 State the role of silica in the metallurgy of copper.

Answer :

The role of silica in metallurgy of copper is to remove the FeO (iron oxide) produced during roasting as slag. If the sulphide ore contains iron, it mixed with silica ( SiO_{2} ) as flux before heating. FeO combines with silica and produce iron silicate ( FeSiO_{3} )

FeO+SiO_{2}\rightarrow FeSiO_{3}(slag)

Question 6.10 Which method of refining may be more suitable if element is obtained in minute quantity?

Answer :

Chromatographic method of refining is particularly suitable if the element is obtained in minute quantity.

Question 6.11 Which method of refining will you suggest for an element in which impurities present have chemical properties close to the properties of that elements?

Answer :

Zone refining is the method for an element in which impurities present have chemical properties close to the properties of those elements.

Question 6.12 Describe a method for refining nickel.

Answer :

Nickel is refined by Mond's Process, in which Nickel is heated in steam in presence of Carbon monoxide ( CO ) to form nickel carbonyl complex . (Ni(CO)_{4}) The complex is volatile in nature.

Ni+4CO\overset{330K-350K}{\rightarrow} Ni(CO)_{4})

This complex is decomposed at high temperature to get a pure nickel.

Ni(CO)_{4}\overset{450K-470K}{\rightarrow} Ni+4CO

Question 6.13 How can you separate alumina from silica in a bauxite ore associated with silica? Give equations, if any.

Answer :

The separation of alumina carried out in the following steps-

  1. The powdered ore is treated with the concentrated NaOH solution at 473K-523K and 35-36 bar pressure.
    \\Al_{2}O_{3}+2NaOH(aq)+3H_{2}O\rightarrow 2Na[Al(OH)_{4}](aq)\\ SiO_{2}+NaOH\rightarrow Na_{2}SiO_{3}+H_{2}O
  2. The CO_{2} gas is passed through the resulting solution to neutralise the aluminate, which results in ppt. of hydrated alumina.
    2Na[Al(OH)_{2}](aq)+CO_{2}\rightarrow Al_{2}O_{3}+2NaHCO_{3}(aq)
    The obtained hydrated alumina is filtered, dried and heated to get pure alumina.
    Al_{2}O_{3}.xH_{2}O\rightarrow Al_{2}O_{3}+x.H_{2}O

Question 6.14 Giving examples, differentiate between ‘roasting’ and ‘calcination’.

Answer :

Roasting- The process of converting sulphide ore to oxide. In this process, the ore is heated in the furnace with a regular supply of air, below its melting temperature: example- sulphide ore of zinc, lead, and copper.

\\2ZnS+3O_{2}\rightarrow 2ZnO+2SO_{2}\\ 2PbS+3O_{2}\rightarrow 2PbO+2SO_{2}\\ 2Cu_{2}S+3O_{2}\rightarrow 2Cu_{2}O+2SO_{2}

Calcination- Process of converting hydroxide and carbonate ore to oxide in a limited supply of air. The temperature should be below the metals melting point in this process volatile matter which escapes, leaving behind the metal oxide.

\\Fe_{2}O_{3}.xH_{2}O \overset{\Delta }{\rightarrow}Fe_{2}O_{3}(s)+xH_{2}O(g)\\ ZnCO_{3} \overset{\Delta }{\rightarrow} ZnO(s)+CO_{2}(g)\\ CaCO_{3}.MgCO_{3} \overset{\Delta }{\rightarrow} CaO(s)+MgO(s)+2CO_{2}(g)

Question 6.15 How is ‘cast iron’ different from ‘pig iron”?

Answer :

The iron that obtains from the blast furnace is pig iron . it contains 4% carbon and many impurities like (s,P,Si,Mn) .

Cast iron is obtained from pig iron by melting pig iron with scrap iron and coke using hot air blast. It contains slightly less carbon content around 3% and it is hard an brittle.

Question 6.16 Differentiate between “minerals” and “ores”.

Answer :

Minerals are the naturally occurring substance which contains some amount of metals. They are found in the earth crust and obtained by mining.

Ores are the specific minerals in which metals are economically extracted. It has a definite composition. Each and every ore is a mineral but not every mineral is ore.

Question 6.17 Why copper matte is put in silica lined converter?

Answer :

The copper matte composed of Cu_{2}S and FeS . It is put in a silica-lined converter to remove the remaining ferrous oxide ( FeO ) and ferrous sulphide ( FeS ) present in copper matte as slag ( FeSiO_{3} )

Some silica is also added and hot air blast is blown to convert the remaining (FeS,FeO \&\ Cu_{2}S/Cu_{2}O) to the metallic copper.

\\2FeS+3O_{2}\rightarrow 2FeO+2SO_{2}\\ FeO+SiO_{2}\rightarrow FeSiO_{3}\\ 2Cu_{2}S+3O_{2}\rightarrow 2Cu_{2}O+2SO_{2}\\ 2CU_{2}O+Cu_{2}S\rightarrow 6Cu+SO_{2}

Question 6.18 What is the role of cryolite in the metallurgy of aluminium?

Answer :

The main purpose of adding cryolite (Na_{3}AlF_{6}) in metallurgy of aluminium is-

  • To increase the electrical conductivity of the alumina Al_{2}O_{3}
  • To decrease the melting point of the mixture

Question 6.19 How is leaching carried out in case of low grade copper ores?

Answer :

In case of low-grade ores, copper is extracted by hydrometallurgy. Leaching is done with the help of acid or bacteria in the presence of air. The solution containing Cu^{2+} is treated with scrap iron or dihydrogen (H_{2}) .

Cu^{2+}(aq)+H_{2}(g)\rightarrow Cu(s)+2H^{+}(aq)

Question 6.20 Why is zinc not extracted from zinc oxide through reduction using CO?

Answer :

According to the Ellingham diagram, the standard Gibbs free energy of formation of ZnO from Zn is lower than the formation of CO_{2} from CO. So, therefore, CO cannot reduce ZnO to zinc ( Zn ).

Question 6.21 The value of
\Delta _ f G ^ \theta for formation of Cr _ 2 O _3 is - 540 KJ mol ^{-1} and that of Al_2 O_3 \: \: is \: \: -827 KJ mol^{-1} . Is the reduction of Cr _ 2 O _3 possible with Al?

Answer :

2Al+3/2O_{2}\rightarrow Al_{2}O_{3} ......................... (-827 KJ/mol)
2Cr+3/2O_{2}\rightarrow Cr_{2}O_{3} ......................... (-540 KJ/mol)
_________________________________ (On substracting )
2Al+Cr_{2}O_{3}\rightarrow Al_{2}O_{3}+2Cr ...............(-287 KJ/mol)

In the above reaction, we see that \Delta_f G^0 of formation of Cr is negative (-287 KJ/mol) Hence the reduction of Cr _ 2 O _3 with aluminium is possible.

Question 6 . 22. Out of C and CO, which is a better reducing agent for ZnO ?

Answer :

15948162614391594816259136
The Gibbs free energy formation of CO_{2} from CO is always higher than the Gibbs free energy of formation of ZnO . Thus CO cannot reduce ZnO .
On the other hand, Gibbs free energy of formation of CO_{2} from C is less than gibbs free energy of formation of ZnO . Hence C can easily reduce ZnO to zinc.

Question 6.23 The choice of a reducing agent in a particular case depends on thermodynamic factor. How far do you agree with this statement? Support your opinion with two examples.

Answer :

gpisc
From the graph we can observe that, a mtal oxide can reduce the oxide of other metals,if the \Delta_f G of the first oxide is more than the second oxide.
example- Mg can reduce ZnO to Zn but Zn cannot reduce MgO because \Delta_f G of MgO from Mg is more negative.

Question 6.24 Name the processes from which chlorine is obtained as a by-product. What will happen if an aqueous solution of NaCl is subjected to electrolysis?

Answer :

In Down's process, we prepare sodium metals in which chlorine is obtained as a by-product. It involves electrolysis of a fused mixture of NaCl and CaCl_{2} . Sodium is deposited at cathode and chlorine at anode as a by-product.

NaCl(l)\rightarrow Na^{+}(melt)+Cl^{-}(melt)

At Cathode - Na^{+}+e^{-}\rightarrow Na

At anode- Cl^{-}\rightarrow \frac{1}{2}Cl_{2}+e^{-}

If an aqueous solution of NaCl is subjected to electrolysis, dihydrogen gas (H_{2}) is evolved at the cathode while chlorine (Cl_{2}) is obtained at the anode.

Question 6.26 Outline the principles of refining of metals by the following methods : (i) Zone refining

Answer :

ZONE REFINING- This method is based on that the impurities are more soluble in the molten state than n the solid state. In this process, a circular mobile heater surrounding the rod of impure metal is fixed at one end. Move the heater from one end to another end so that the impurities present in the rod also moves to the other end of the rod. Repeat the process several times again and again. Impurities get concentrated at separate ends of the rod. This end is cut off.

15948162747281594816273274

Question 6.26 Outline the principles of refining of metals by the following methods : (ii)Electrolytic refining

Answer :

Electrolytic refining- It is a process of refining impure metals by electricity . In this method, impure metal is act as anode and the same pure metal strip is act as cathode. Same metal salt which is soluble is taken as the electrolyte. When electricity is passed the metal ions deposited at the cathode (pure metal) and the impure metal is starting dissolving in the solution in the form of ions. Impurities present in metal (impure metal) gets collected at bottom of the anode (as anode mud )

Question 6.26 Outline the principles of refining of metals by the following methods :(iii)Vapour phase refining

Answer :

Vapour phase refining- In this process metal is converted into its volatile compound which is collected and decomposed to give pure metals.

Two major requirement-

  • The metal should form a volatile compound with a suitable reagent.
  • the volatile compound should be easily decomposable so that to recover easily

Question 6.27 Predict conditions under which Al might be expected to reduce MgO.

Answer :

As per the Ellingham diagram, above 1350, the standard Gibbs free energy of formation (\Delta G^{0}_{f}) of Al_{2}O_{3} is lower than the MgO from Mg . So, that's why above 1350^{0}C , Al can reduce MgO.

Topics of NCERT Syllabus Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements-

6.1 Occurrence of Metals

6.2 Concentration of Ores

6.3 Extraction of Crude Metal from Concentrated Ore

6.4 Thermodynamic Principles of Metallurgy

6.5 Electrochemical Principles of Metallurgy

6.6 Oxidation Reduction1636.7Refining

6.8 Uses of Aluminium, Copper, Zinc, and Iron

NCERT Solutions 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

More about NCERT Solutions for Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements

  • In NCERT Class 12 Chemistry chapter 6 General Principles and Processes of Isolation of Elements, there are a total of eight sub-topics that cover important concepts of the chapter.

  • After completing this NCERT Class 12th Chemistry solutions, you will be able to explain the terms like ores, minerals, concentration, benefaction, calcination, roasting, refining, etc.

  • You will be able to understand the principles of oxidation and reduction as applied to the process of extraction, to apply the thermodynamic concepts like that of entropy and Gibbs energy of the extraction of Cu, Al, Fe, and Zn etc.

Also Check NCERT Books and NCERT Syllabus here:

JEE Main Highest Scoring Chapters & Topics
Just Study 40% Syllabus and Score upto 100%
Download EBook

Benefits of NCERT Solutions for Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements

  • The step-by-step solutions given in the NCERT class 12 Chemistry solutions chapter 6 will aid you in understanding the chapter easily.

  • The revision will be a lot much easier because with the help of solutions you will always remember the concepts and get very good marks in your class.

  • Homework will not be a problem now, all you need to do is check the detailed CBSE Class 12 Chemistry Chapter 6 NCERT solutions and you are good to go.

  • NCERT Solutions for Class 12 Chemistry Chapter 6 PDF Download option can be used to download the complete page and read offline.

NCERT Solutions for Class 12 Subject wise

Frequently Asked Question (FAQs)

1. What is the weightage of NCERT Class 12 Chemistry chapter 6 in JEE Mains?

One question can be expected for JEE Main from the chapter General Principles and Processes of Isolation of Elements

2. What is the weightage of NCERT Class 12 Chemistry chapter 6 in the CBSE board exam?

Around 3 marks of questions will be asked in the CBSE exam from General Principles and Processes of Isolation of Elements. Follow NCERT book for a good score. More problems can be solved using NCERT exemplar for Class 12 Chemistry.

3. What are the important topics of General Principles and Processes of Isolation of Elements?

The important topics of this chapter are

  • Leaching reactions

  • Blast furnace reactions

  • Extraction processes

Articles

Explore Top Universities Across Globe

Questions related to CBSE Class 12th

Have a question related to CBSE 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

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.

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.

If you'll do hard work then by hard work of 6 months you can achieve your goal but you have to start studying for it dont waste your time its a very important year so please dont waste it otherwise you'll regret.

Yes, you can take admission in class 12th privately there are many colleges in which you can give 12th privately.

View All

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 3.8×107 J 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

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
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
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
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
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
Geotechnical engineer

The role of geotechnical engineer starts with reviewing the projects needed to define the required material properties. The work responsibilities are followed by a site investigation of rock, soil, fault distribution and bedrock properties on and below an area of interest. The investigation is aimed to improve the ground engineering design and determine their engineering properties that include how they will interact with, on or in a proposed construction. 

The role of geotechnical engineer in mining includes designing and determining the type of foundations, earthworks, and or pavement subgrades required for the intended man-made structures to be made. Geotechnical engineering jobs are involved in earthen and concrete dam construction projects, working under a range of normal and extreme loading conditions. 

3 Jobs Available
Cartographer

How fascinating it is to represent the whole world on just a piece of paper or a sphere. With the help of maps, we are able to represent the real world on a much smaller scale. Individuals who opt for a career as a cartographer are those who make maps. But, cartography is not just limited to maps, it is about a mixture of art, science, and technology. As a cartographer, not only you will create maps but use various geodetic surveys and remote sensing systems to measure, analyse, and create different maps for political, cultural or educational purposes.

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

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
Product Manager

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.  

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
Finance Executive
3 Jobs Available
Operations Manager

Individuals in the operations manager jobs are responsible for ensuring the efficiency of each department to acquire its optimal goal. They plan the use of resources and distribution of materials. The operations manager's job description includes managing budgets, negotiating contracts, and performing administrative tasks.

3 Jobs Available
Investment Director

An investment director is a person who helps corporations and individuals manage their finances. They can help them develop a strategy to achieve their goals, including paying off debts and investing in the future. In addition, he or she can help individuals make informed decisions.

2 Jobs Available
Welding Engineer

Welding Engineer Job Description: A Welding Engineer work involves managing welding projects and supervising welding teams. He or she is responsible for reviewing welding procedures, processes and documentation. A career as Welding Engineer involves conducting failure analyses and causes on welding issues. 

5 Jobs Available
Transportation Planner

A career as Transportation Planner requires technical application of science and technology in engineering, particularly the concepts, equipment and technologies involved in the production of products and services. In fields like land use, infrastructure review, ecological standards and street design, he or she considers issues of health, environment and performance. A Transportation Planner assigns resources for implementing and designing programmes. He or she is responsible for assessing needs, preparing plans and forecasts and compliance with regulations.

3 Jobs Available
Plumber

An expert in plumbing is aware of building regulations and safety standards and works to make sure these standards are upheld. Testing pipes for leakage using air pressure and other gauges, and also the ability to construct new pipe systems by cutting, fitting, measuring and threading pipes are some of the other more involved aspects of plumbing. Individuals in the plumber career path are self-employed or work for a small business employing less than ten people, though some might find working for larger entities or the government more desirable.

2 Jobs Available
Construction Manager

Individuals who opt for a career as construction managers have a senior-level management role offered in construction firms. Responsibilities in the construction management career path are assigning tasks to workers, inspecting their work, and coordinating with other professionals including architects, subcontractors, and building services engineers.

2 Jobs Available
Urban Planner

Urban Planning careers revolve around the idea of developing a plan to use the land optimally, without affecting the environment. Urban planning jobs are offered to those candidates who are skilled in making the right use of land to distribute the growing population, to create various communities. 

Urban planning careers come with the opportunity to make changes to the existing cities and towns. They identify various community needs and make short and long-term plans accordingly.

2 Jobs Available
Highway Engineer

Highway Engineer Job Description: A Highway Engineer is a civil engineer who specialises in planning and building thousands of miles of roads that support connectivity and allow transportation across the country. He or she ensures that traffic management schemes are effectively planned concerning economic sustainability and successful implementation.

2 Jobs Available
Environmental Engineer

Individuals who opt for a career as an environmental engineer are construction professionals who utilise the skills and knowledge of biology, soil science, chemistry and the concept of engineering to design and develop projects that serve as solutions to various environmental problems. 

2 Jobs Available
Naval Architect

A Naval Architect is a professional who designs, produces and repairs safe and sea-worthy surfaces or underwater structures. A Naval Architect stays involved in creating and designing ships, ferries, submarines and yachts with implementation of various principles such as gravity, ideal hull form, buoyancy and stability. 

2 Jobs Available
Orthotist and Prosthetist

Orthotists and Prosthetists are professionals who provide aid to patients with disabilities. They fix them to artificial limbs (prosthetics) and help them to regain stability. There are times when people lose their limbs in an accident. In some other occasions, they are born without a limb or orthopaedic impairment. Orthotists and prosthetists play a crucial role in their lives with fixing them to assistive devices and provide mobility.

6 Jobs Available
Veterinary Doctor
5 Jobs Available
Pathologist

A career in pathology in India is filled with several responsibilities as it is a medical branch and affects human lives. The demand for pathologists has been increasing over the past few years as people are getting more aware of different diseases. Not only that, but an increase in population and lifestyle changes have also contributed to the increase in a pathologist’s demand. The pathology careers provide an extremely huge number of opportunities and if you want to be a part of the medical field you can consider being a pathologist. If you want to know more about a career in pathology in India then continue reading this article.

5 Jobs Available
Speech Therapist
4 Jobs Available
Gynaecologist

Gynaecology can be defined as the study of the female body. The job outlook for gynaecology is excellent since there is evergreen demand for one because of their responsibility of dealing with not only women’s health but also fertility and pregnancy issues. Although most women prefer to have a women obstetrician gynaecologist as their doctor, men also explore a career as a gynaecologist and there are ample amounts of male doctors in the field who are gynaecologists and aid women during delivery and childbirth. 

4 Jobs Available
Oncologist

An oncologist is a specialised doctor responsible for providing medical care to patients diagnosed with cancer. He or she uses several therapies to control the cancer and its effect on the human body such as chemotherapy, immunotherapy, radiation therapy and biopsy. An oncologist designs a treatment plan based on a pathology report after diagnosing the type of cancer and where it is spreading inside the body.

3 Jobs Available
Audiologist

The audiologist career involves audiology professionals who are responsible to treat hearing loss and proactively preventing the relevant damage. Individuals who opt for a career as an audiologist use various testing strategies with the aim to determine if someone has a normal sensitivity to sounds or not. After the identification of hearing loss, a hearing doctor is required to determine which sections of the hearing are affected, to what extent they are affected, and where the wound causing the hearing loss is found. As soon as the hearing loss is identified, the patients are provided with recommendations for interventions and rehabilitation such as hearing aids, cochlear implants, and appropriate medical referrals. While audiology is a branch of science that studies and researches hearing, balance, and related disorders.

3 Jobs Available
Hospital Administrator

The hospital Administrator is in charge of organising and supervising the daily operations of medical services and facilities. This organising includes managing of organisation’s staff and its members in service, budgets, service reports, departmental reporting and taking reminders of patient care and services.

2 Jobs Available
Actor

For an individual who opts for a career as an actor, the primary responsibility is to completely speak to the character he or she is playing and to persuade the crowd that the character is genuine by connecting with them and bringing them into the story. This applies to significant roles and littler parts, as all roles join to make an effective creation. Here in this article, we will discuss how to become an actor in India, actor exams, actor salary in India, and actor jobs. 

4 Jobs Available
Acrobat

Individuals who opt for a career as acrobats create and direct original routines for themselves, in addition to developing interpretations of existing routines. The work of circus acrobats can be seen in a variety of performance settings, including circus, reality shows, sports events like the Olympics, movies and commercials. Individuals who opt for a career as acrobats must be prepared to face rejections and intermittent periods of work. The creativity of acrobats may extend to other aspects of the performance. For example, acrobats in the circus may work with gym trainers, celebrities or collaborate with other professionals to enhance such performance elements as costume and or maybe at the teaching end of the career.

3 Jobs Available
Video Game Designer

Career as a video game designer is filled with excitement as well as responsibilities. A video game designer is someone who is involved in the process of creating a game from day one. He or she is responsible for fulfilling duties like designing the character of the game, the several levels involved, plot, art and similar other elements. Individuals who opt for a career as a video game designer may also write the codes for the game using different programming languages.

Depending on the video game designer job description and experience they may also have to lead a team and do the early testing of the game in order to suggest changes and find loopholes.

3 Jobs Available
Radio Jockey

Radio Jockey is an exciting, promising career and a great challenge for music lovers. If you are really interested in a career as radio jockey, then it is very important for an RJ to have an automatic, fun, and friendly personality. If you want to get a job done in this field, a strong command of the language and a good voice are always good things. Apart from this, in order to be a good radio jockey, you will also listen to good radio jockeys so that you can understand their style and later make your own by practicing.

A career as radio jockey has a lot to offer to deserving candidates. If you want to know more about a career as radio jockey, and how to become a radio jockey then continue reading the article.

3 Jobs Available
Choreographer

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
Videographer
2 Jobs Available
Multimedia Specialist

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
Social Media Manager

A career as social media manager involves implementing the company’s or brand’s marketing plan across all social media channels. Social media managers help in building or improving a brand’s or a company’s website traffic, build brand awareness, create and implement marketing and brand strategy. Social media managers are key to important social communication as well.

2 Jobs Available
Copy Writer

In a career as a copywriter, one has to consult with the client and understand the brief well. A career as a copywriter has a lot to offer to deserving candidates. Several new mediums of advertising are opening therefore making it a lucrative career choice. Students can pursue various copywriter courses such as Journalism, Advertising, Marketing Management. Here, we have discussed how to become a freelance copywriter, copywriter career path, how to become a copywriter in India, and copywriting career outlook. 

5 Jobs Available
Journalist

Careers in journalism are filled with excitement as well as responsibilities. One cannot afford to miss out on the details. As it is the small details that provide insights into a story. Depending on those insights a journalist goes about writing a news article. A journalism career can be stressful at times but if you are someone who is passionate about it then it is the right choice for you. If you want to know more about the media field and journalist career then continue reading this article.

3 Jobs Available
Publisher

For publishing books, newspapers, magazines and digital material, editorial and commercial strategies are set by publishers. Individuals in publishing career paths make choices about the markets their businesses will reach and the type of content that their audience will be served. Individuals in book publisher careers collaborate with editorial staff, designers, authors, and freelance contributors who develop and manage the creation of content.

3 Jobs Available
Vlogger

In a career as a vlogger, one generally works for himself or herself. However, once an individual has gained viewership there are several brands and companies that approach them for paid collaboration. It is one of those fields where an individual can earn well while following his or her passion. 

Ever since internet costs got reduced the viewership for these types of content has increased on a large scale. Therefore, a career as a vlogger has a lot to offer. If you want to know more about the Vlogger eligibility, roles and responsibilities then continue reading the article. 

3 Jobs Available
Editor

Individuals in the editor career path is an unsung hero of the news industry who polishes the language of the news stories provided by stringers, reporters, copywriters and content writers and also news agencies. Individuals who opt for a career as an editor make it more persuasive, concise and clear for readers. In this article, we will discuss the details of the editor's career path such as how to become an editor in India, editor salary in India and editor skills and qualities.

3 Jobs Available
Linguist

Linguistic meaning is related to language or Linguistics which is the study of languages. A career as a linguistic meaning, a profession that is based on the scientific study of language, and it's a very broad field with many specialities. Famous linguists work in academia, researching and teaching different areas of language, such as phonetics (sounds), syntax (word order) and semantics (meaning). 

Other researchers focus on specialities like computational linguistics, which seeks to better match human and computer language capacities, or applied linguistics, which is concerned with improving language education. Still, others work as language experts for the government, advertising companies, dictionary publishers and various other private enterprises. Some might work from home as freelance linguists. Philologist, phonologist, and dialectician are some of Linguist synonym. Linguists can study French, German, Italian

2 Jobs Available
Public Relation Executive
2 Jobs Available
Travel Journalist

The career of a travel journalist is full of passion, excitement and responsibility. Journalism as a career could be challenging at times, but if you're someone who has been genuinely enthusiastic about all this, then it is the best decision for you. Travel journalism jobs are all about insightful, artfully written, informative narratives designed to cover the travel industry. Travel Journalist is someone who explores, gathers and presents information as a news article.

2 Jobs Available
Welding Engineer

Welding Engineer Job Description: A Welding Engineer work involves managing welding projects and supervising welding teams. He or she is responsible for reviewing welding procedures, processes and documentation. A career as Welding Engineer involves conducting failure analyses and causes on welding issues. 

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
Product Manager

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.  

3 Jobs Available
Production Manager
3 Jobs Available
Merchandiser
2 Jobs Available
QA Lead

A QA Lead is in charge of the QA Team. The role of QA Lead comes with the responsibility of assessing services and products in order to determine that he or she meets the quality standards. He or she develops, implements and manages test plans. 

2 Jobs Available
Metallurgical Engineer

A metallurgical engineer is a professional who studies and produces materials that bring power to our world. He or she extracts metals from ores and rocks and transforms them into alloys, high-purity metals and other materials used in developing infrastructure, transportation and healthcare equipment. 

2 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. 

4 Jobs Available
AWS Solution Architect

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
QA Manager
4 Jobs Available
Computer Programmer

Careers in computer programming primarily refer to the systematic act of writing code and moreover include wider computer science areas. The word 'programmer' or 'coder' has entered into practice with the growing number of newly self-taught tech enthusiasts. Computer programming careers involve the use of designs created by software developers and engineers and transforming them into commands that can be implemented by computers. These commands result in regular usage of social media sites, word-processing applications and browsers.

3 Jobs Available
ITSM Manager
3 Jobs Available
Product Manager

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.  

3 Jobs Available
Information Security Manager

Individuals in the information security manager career path involves in overseeing and controlling all aspects of computer security. The IT security manager job description includes planning and carrying out security measures to protect the business data and information from corruption, theft, unauthorised access, and deliberate attack 

3 Jobs Available
Back to top