Chemistry Mock Test series:2

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1. 
Temporary hardness of water is due to the presence of-

2. 
The chemical used as a fixer/developer in photography-

3. 
Which is the most reactive metal?

4. 
The gas produced in marshy places due to decomposition of vegetation in-

5. 
When a helium atom loses an electron it becomes-

6. 
The most common lanthanide is-

7. 
Which one of the following gases has colour?

8. 
The three basic components of an atom are-

9. 
Heavy water is used as a coolant in nuclear reactors. Heavy water is-

10. 
Which of the following is responsible for permanent hardness of water?

11. 
Which one of the following allotropes of the carbon is used in cutting and drilling -

12. 
Alcohol obtained in the saponification process is-

13. 
One of the best solutions to get rid of non-biodegradable wastes is-

14. 
In the reaction ZnO+C -> Zn+CO, 'C' acts as-

15. 
The word 'Insolation' means-

16. 
What is the chemical name of the common salt?

17. 
Which of the following metals has least melting point?

18. 
Which one of the following mixture is homogeneous?

19. 
The gas used to extinguish fire is-

20. 
In electro-refining, the pure metal is deposited on-

21. 
The first organic compound synthesized in the laboratory was-

22. 
Aluminium suface are often anodized. This means the deposition of a layer of-

23. 
Which one of the following is responsible for blue baby syndrome?

24. 
Breath analysers used by police to test drunken drivers works on the chemical basis of-

25. 
Most of the explosion in mines occur due to the mixing of-

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