Hydrogen and Water - 5


1. Compounds, which absorb moisture on exposure to atmosphere, are called ______ compounds.


2. Boiling and ______ of water are the cheapest method of sterilization of water.

3. The compound of ________ and oxygen is called heavy water.

4. Crystal of iron sulphate contains ________ water molecules.


5. Ca++ and Mg++ ions present in hard water form _______ salts.


6. The saltish taste of sea water is mainly due to ___________.


7. Hydrites are the compounds of _________ wiht metals and non-metals.


8. Water reacts with oxides of highly reactive _________ to form their respective hydroxides.


9. The nascent hydrogen is _________ reactive than molecular hydrogen.


10. Sun and other stars are composed largerly of _________.


11. Isotopes of an element have __________ atomic masses.


12. Water exists in nature in __________ states.


13. Water is formed by burning __________ gas in air.


14. Hydride ion is formed by _______ of electron of hydrogen.


15. Carbon dioxide turns lime water milky due to formation of insoluble __________.





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