Chemistry

1. The major component of CNG is :

(A) Methane

(B) Ethane

(C) Propane

(D) Butane

2. The neutron was discovered by

(A) Becquerel

(B) Madam Curie

(C) Aston

(D) Chadwick

3. In paper manufacturing, degumming of the raw material is done using :

(A) Sulphuric acid

(B) Bleaching Powder

(C) Nitric acid

(D) Caustic soda

4. Liquid and gases never show :

(A) Electromagnetic property

(B) Ferromagnetic property

(C) Diamagnetic property

(D) Paramagnetic property

5. Methyl Isocyanate gas, which is involved in the disaster in Bhopal in December 1984, was used in the union carbide in the union carbide factory for production of :

(A) Detergents

(B) Pesticides

(C) Dyes

(D) Explosives

6. Which one of the following hormones contains peptide chain ?

(A) Insulin

(B) Corticotrophin

(C) Cortisone

(D) Oxytocin

7. Which one of the following gases is released mostly from landfills in urban areas ?

(A) Hydrogen

(B) Nitrogen

(C) Oxygen

(D) Methane

8. The most serious air pollutants causing health hazard is :

(A) Sulphur dioxide

(B) Ozone

(C) Nitrogen oxide

(D) Carbon monoxide

9. The chemical name of quartz is :

(A) Calcium Phosphate

(B) Calcium oxide

(C) Sodium silicate

(D) Sodium phosphate

10. The number of hydrogen bonds between guanine and cytosine in DNA is :

(A) 2

(B) 3

(C) 4

(D) 1

11. Dry ice is the solid form of :

(A) Carbon dioxide

(B) Nitrogen

(C) Water

(D) Air

12. The gas that causes suffocation and death when coal or coke is burnt in a closed room is :

(A) Ethane

(B) Methane

(C) Carbon dioxide

(D) Carbon monoxide

13. Acid rain is caused by the pollution of environment by :

(A) Carbon dioxide and nitrogen

(B) Nitrous oxide and sulphur dioxide

(C) Carbon monoxide and carbon dioxide

(D) Ozone and carbon dioxide

14. …………….. was the inventor of atomic theory ?

(A) Henery Bacqurel

(B) Rutherford

(C) Madam Curie

(D) Irine Curie

15. Which method of water purification does not kill microorganism ?

(A) Boiling

(B) UV-irradiation

(C) Filtration

(D) Chlorination