General Science – 1 – 2

6. Galvanised iron sheets have a coating of :

(a) lead
(b) chromium
(c) zinc
(d) tin

ANSWER

EXPLANATION

7. Potassium nitrate is used in :

(a) medicine
(b) fertiliser
(c) salt
(d) glass

ANSWER

EXPLANATION

8. From which mineral is radium obtained ?

(a) Rutile
(b) Haematite
(c) Limestone
(d) Pitchblende

ANSWER

EXPLANATION

9. What is laughing gas ?

(a) Nitrous Oxide
(b) Carbon monoxide
(c) Sulphur dioxide
(d) Hydrogen peroxide

ANSWER

EXPLANATION

10. LPG consists of mainly :

(a) methane, ethane and hexane
(b) ethane, hexane and nonane
(c) methane, hexane and nonane
(d) methane, butane and propane

ANSWER

EXPLANATION


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