CBSE Class 12 Chemistry General principles and Processes of isolation of elements Question Bank

Access the latest CBSE Class 12 Chemistry General principles and Processes of isolation of elements Question Bank. We have provided free printable Class 12 Chemistry worksheets in PDF format, specifically designed for Unit 6 General Principles and Processes of Isolation of Elements. These practice sets are prepared by expert teachers following the 2025-26 syllabus and exam patterns issued by CBSE, NCERT, and KVS.

Unit 6 General Principles and Processes of Isolation of Elements Chemistry Practice Worksheet for Class 12

Students should use these Class 12 Chemistry chapter-wise worksheets for daily practice to improve their conceptual understanding. This detailed test papers include important questions and solutions for Unit 6 General Principles and Processes of Isolation of Elements, to help you prepare for school tests and final examination. Regular practice of these Class 12 Chemistry questions will help improve your problem-solving speed and exam accuracy for the 2026 session.

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General principles and Processes of isolation of elements
 
VSA QUESTIONS (1 - MARK QUESTIONS)
 
1. Sulphide ores are subjected to roasting, while carbonate ores are subjected to calcination. Comment on the statement
 
2. The reduction of the metal oxide is easier if the metal formed is in liquid state, at the temperature of reduction. Give reason
 
3. How is copper extracted with a low grade ore of it?
 
4. What are collectors in froth flotation process? Give one example
 
5. Name the most important form of iron. Mention its one use.
 
6. What are froth stabilizers? Give two examples
 
7. What are the constituents of German silver?
 
8. Write the reaction involved in the extraction of copper from low grade ores
 
9. The graphite electrodes in the extraction of ‘alluminium’ by Hall-Heroult process need to be changed frequently. Why?
 
10. Mention the role of following : (Each question carries one mark)
i. SiO2 in the extraction of Cu from copper matte.
ii. CaCO3 in the metallurgy of Fe.
iii. CO in the metallurgy of iron .
iv. I2 in the purification of zirconium.
v. NaCN in the extraction of gold from gold ore.
vi. Cryolite in the metallurgy of Al.
 
SA (I) QUESTIONS (2 - MARK QUESTIONS)
 
11. i. How is chemical reduction different from electrolytic reduction?
ii. Name a metal each is obtained by
(a) electrolytic reduction
(b) chemical reduction.
 
12. Write the Chemical reactions taking place in different zones in the blast furnace for the extraction of iron from its ore.
 
13. Give equations for the industrial extraction of zinc from calamine.
 
14. Gibbs energies of formation ΔfG of MgO(s) and CO(g) at 1273K and 2273 K are given below:
ΔfG [MgO(s)] = –941 kJ mol–1 at 1273 K.
ΔfG [CO(g)] = –439 kJ mol–1 at 1273 K.
ΔfG [MgO(s)] = –314 kJ mol–1 at 2273 K. ΔfG [CO(g)] = –628 kJ mol–1 at 2273 K.
 
On the basis of above data, predict the temperature at which carbon can be used as a reducing agent for MgO(s).
 
15. 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.
 
SA (II) TYPE QUESTIONS (3 - MARK QUESTIONS)
 
16. i. Name the principal ore of Aluminium.
ii. Write the equation for the reactions taking place at the anode and the cathode during the extraction of aluminium by the electrolytic process
 
17. i. Write the name or formula of any two sulphide ores of copper.
ii. Explain the froth floatation process
 
18. Describe how the following changesare brought about
i. Pig iron into steel
ii. Zinc Oxide into metallic zinc
iii. Impure titanium into pure titanium
 
19. Describe the principle behind each of the following processes
i. Vapour phase refining of a metal
ii. Electrolytic refining of a metal
iii. Recovery of silver after silver ore was leached with NaCN.
 
20. State the principles of the following methods of refining crude metals
i. Zone refining
ii. Liquation method
iii. Chromatographic method.

 

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~ Class 12 Chemistry (Old Chapters)
CBSE Class 12 Chemistry Chemistry in Everyday Life Question Bank
CBSE Class 12 Chemistry Chemistry in Everyday Life Worksheet Set A
CBSE Class 12 Chemistry Chemistry in Everyday Life Worksheet Set B
CBSE Class 12 Chemistry General principles and Processes of isolation of elements Question Bank
CBSE Class 12 Chemistry General Principles and Processes of Isolation of Elements Worksheet Set A
CBSE Class 12 Chemistry General Principles And Processes of Isolation of Elements Worksheet Set B
CBSE Class 12 Chemistry General Principles And Processes of Isolation of Elements Worksheet Set C
CBSE Class 12 Chemistry General Principles And Processes of Isolation of Elements Worksheet Set D
CBSE Class 12 Chemistry General Principles And Processes of Isolation of Elements Worksheet Set E
CBSE Class 12 Chemistry In Everyday Life Question Bank
CBSE Class 12 Chemistry In Everyday Life Worksheet Set A
CBSE Class 12 Chemistry Polymers Worksheet Set A
CBSE Class 12 Chemistry Polymers Worksheet Set B
CBSE Class 12 Chemistry Polymers Worksheet Set C
CBSE Class 12 Chemistry Polymers Worksheet Set D
CBSE Class 12 Chemistry Solid State Question Bank
CBSE Class 12 Chemistry Solid State Question Bank Set A
CBSE Class 12 Chemistry Solid State Question Bank Set B
CBSE Class 12 Chemistry Solid State Worksheet
CBSE Class 12 Chemistry Surface Chemistry Question Bank
CBSE Class 12 Chemistry Surface Chemistry Question Bank Set A
CBSE Class 12 Chemistry Surface Chemistry Question Bank Set B
CBSE Class 12 Chemistry Surface Chemistry Worksheet Set A
CBSE Class 12 Chemistry Surface Chemistry Worksheet Set B
CBSE Class 12 Chemistry Surface Chemistry Worksheet Set C
CBSE Class 12 Chemistry Surface Chemistry Worksheet Set D
CBSE Class 12 Chemistry Surface Chemistry Worksheet Set E
CBSE Class 12 Chemistry The P Block Elements Question Bank
CBSE Class 12 Chemistry The P Block Elements Question Bank Set A
CBSE Class 12 Chemistry The P Block Elements Question Bank Set B
CBSE Class 12 Chemistry The p Block Elements Worksheet Set A
CBSE Class 12 Chemistry The p Block Elements Worksheet Set B
CBSE Class 12 Chemistry The p Block Elements Worksheet Set C
CBSE Class 12 Chemistry The P Block Elements Worksheet Set E
CBSE Class 12 Chemistry The P Block Elements Worksheet Set F
CBSE Class 12 Chemistry The Solid State Worksheet Set A
CBSE Class 12 Chemistry The Solid State Worksheet Set B

Unit 6 General Principles and Processes of Isolation of Elements CBSE Class 12 Chemistry Worksheet

Students can use the Unit 6 General Principles and Processes of Isolation of Elements practice sheet provided above to prepare for their upcoming school tests. This solved questions and answers follow the latest CBSE syllabus for Class 12 Chemistry. You can easily download the PDF format and solve these questions every day to improve your marks. Our expert teachers have made these from the most important topics that are always asked in your exams to help you get more marks in exams.

NCERT Based Questions and Solutions for Unit 6 General Principles and Processes of Isolation of Elements

Our expert team has used the official NCERT book for Class 12 Chemistry to create this practice material for students. After solving the questions our teachers have also suggested to study the NCERT solutions  which will help you to understand the best way to solve problems in Chemistry. You can get all this study material for free on studiestoday.com.

Extra Practice for Chemistry

To get the best results in Class 12, students should try the Chemistry MCQ Test for this chapter. We have also provided printable assignments for Class 12 Chemistry on our website. Regular practice will help you feel more confident and get higher marks in CBSE examinations.

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