Chemistry Mock Test series:5

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1. 
An atom has 7 electrons in its M-shell and contains 18 neutrons in its nucleus. What is its mass number?

2. 
Which gas emitted by power stations causes acid rain?

3. 
Most commonly used bleaching agent is-

4. 
By what factor is a solution with pH=2 more acidic than one with pH=6?

5. 
Which one of the following petroleum refinery products has the lowest boiling point-

6. 
The most electronegative element among the following is-

7. 
Chemically vermillion is-

8. 
Which of the following has highest frequency?

9. 
The increasing abundance of green house gases in atmosphere has led to the following effect except-

10. 
The heaviest naturally occurring elements is-

11. 
Which one of the following groups of gases contribute to the Green House Effect?

12. 
What is used for writing on glass-

13. 
Heating of a ore below its melting point in the absence of air is known as-

14. 
The inert gas used as beacon light is-

15. 
The offending substance in the liquor tragedies leading to blindness etc. is-

16. 
Gypsum is used for improvement of-

17. 
Tritium is an isotope of-

18. 
What is the chemical name of Gammaxene?

19. 
The radioactivity was discovered in 1898 AD by-

20. 
The product of equivalent weight and valency of an element is equal to-

21. 
Phosphorus is an essential constituent of-

22. 
Which of the following is used as a lubricant?

23. 
Natural rubber is a polymer of-

24. 
Which of the following has zero electron affinity-

25. 
In the ordinary fire extinguisher, carbon dioxide is generated by the reaction of-

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