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General Chemistry Previously Asked Questions: Hydrogen and its Compounds
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General Chemistry Previously Asked Questions: Hydrogen and its Compounds
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25 Questions

1. The process used for transforming salty water into pure water is called
2. Which is the purest form of water?
3. By which process the sea water can be converted into pure water?
4. The substance used as moderator and coolant both, in nuclear reactors is
5. Burning of Hydrogen produces
6. Which one of the following catalysts is used in hydrogenation of vegetable oils?
7. By which process, Alum cleans the muddy water?
8. According to weight, the percentage of hydrogen in water
(H2O), is
9. Permanent hardness of water is due to
10. Which one of the following fuels causes minimum air pollution?
11. What is heavy water?
12. Heavy water is a type of
13. Who among the following discovered heavy water?
14. Water is a good solvent of ionic salts because
15. Which gas is used in the purification of drinking water?
16. Heavy water has molecular weight
17. The gas used in the manufacture of Vanaspati Ghee from Vanaspati Oil is
18. One mole of Hydrogen gas burns in excess of Oxygen to give 290 kJ of heat. What is the amount of heat produced when 4g of Hydrogen gas is burnt under the same conditions?
19. The pH value for water is
20. Large quantities of drinking water is prepared from impure water by
21. Heavy water
22. Consider the following statements and select the correct answer from given codes below.
1. Water becomes harder due to the presence of Calcium Sulphate and it is not usable.
2. Diamond is harder than copper and iron.
3. Oxygen is the main component of air.
4. Nitrogen is used in the manufacture of vegetable ghee. Code
23. An element X has four electrons in its outermost orbit. What will be the formula of its compounds with hydrogen?
24. Heavy water is that water
25. The chemical formula of Heavy Water is

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