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.