General Awareness -Chemistry

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General Awareness -Chemistry

1- Chlorides and sulfates of calcium and magnesium give hardness to water.

2-Silver iodide chemical is used in the cloud seeding or the artificial rain.

3-Phosphorus is kept under water to save it from catching fire when exposed to dry air .

4-Phenol is a raw material used in the manufacture of Bakelite.

5-Copper sulphate chemical is also known in the names ‘Blue vitriol and Bluestone.

6-The metal used to recover copper from a solution of copper sulphate is iron.

7-The metallurgical process in which a metal is obtained in a fused state is called smelting.

8-The scientists, Newlands, Mendeleev, and Meyer are associated with the development of periodic table.

9-The maximum number of covalent formed by nitrogen is four.

10-The metal that is usually extracted from sea water is Magnesium (Mg).

11-The main chemical constituent of clay is aluminium silicate.

12-The chemical name for water (H2O) is dihydrogen monoxide.

13-Gold and copper are only  two non-silvery metals.

14-Balloons filled with Helium float because helium is lighter than air.

15-Dry ice is also known as the solid form of carbon dioxide, CO2.

16- Bromine and Mercury are only two liquid elements at room temperature.

17-Lavoisier is regarded as father of modern chemistry.

18- Rare gases are  di atomic.

19-silver iodide is used to produce artificial rain .

20-Sodium thiosulphate chemical is used as a fixer in photography.

21- Aspirin is methyl salicylate.

22-Ni metal is used as a catalyst in the hydrogenation of oils.

23-Gold is the most malleable metal.

24-Ethylene gas is used for artificial ripening of green fruits.

25-Faraday’s Law is associated with Electrolysis.

26-Nitrous oxide is laughing gas.

27-Sodium chloride is the chemical name of table salt.

28-Brass is an alloy of Copper and Zinc.

29-Polyvinyl chloride has been used for making contact lenses.

30-Chlorofluorocarbon gas is filled in refrigerators.

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