GK/General Awareness/G-Studies,

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GK

1-Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of  Zeolites

2- Rust is a mixture of Fe2O3, 3H2O and FeO

3-The metallic constituents of hard water are Calcium, magnesium and iron

4-Old-written material, which cannot be read easily can be read by Infra Red rays

5-The type of glass used in making prisms and lenses is Flint glass

6-Hydrometer is an instrument used for measuring the specific gravity of liquids

7-Cholera is caused by vibrio cholerae

8-Cooking oil can be converted into vegetable ghee by the process of hydrogenation

9-The contact process is involved in the manufacture of Sulphuric acid

10-The location and energy of an electron in an atom can be specified by Quantum numbers

11-Bromine is a red liquid

12-Water has maximum density at  4°C

13-Iodine is obtained from sea weeds

14-The metal used in storage batteries is Lead

15-Hybridisation is  cross-fertilisation between two varieties

16- The volume of water decreases when it is heated from 0°C to 5°C

17- Hydrogen bomb is based on the process of fusion

18-The life history of human malarial parasite in Anopheles was first described by Ronald Ross

19-Silver bromide is useful in photography

20-The buoyancy depends on the mass of the liquid displaced.

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