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NCERTCBSE CHEMISTRY CLASS 12 CHAPTERWISE MCQ QUESTIONS

Welcome to your Unit 6: General Principles and Processes of Isolation of Elements

1. 
Which of the following is the chief ore of aluminium?

2. 
Which of the following is the finest iron ore?

3. 
Which of the cases is suitable for concentration by hand picking?

4. 
What is the type of metallurgy in which the ore is leached and the metal is collected by using electrolysis?

5. 
Which of the following is the correct Gibbs equation?

6. 
Which of the following metals are reduced from molten salt solutions by electrolysis?

7. 
Which of the following is chlorine isolated from by oxidation?

8. 
Which of the following is not an impurity generally present in crude metals?

9. 
Which metal is used for galvanising iron?

10. 
Which of the following metals is a good conductor of electricity and conducts electricity twice as much as the other elements?

11. 
Which of the following metals cannot be refined by distillation?

12. 
What is the voltage at which electrolysis of brine takes place?

13. 
Which of the following is a product formed during the electrolysis of brine?

14. 
What is the process used to extract sodium from halide ores such as sodium chloride (NaCl)?

15. 
What is the composition of brass?

16. 
In thermite process, what is the reducing agent used?

Thank You

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