General Science – 1 – 3

11. Air is a/an :

(a) compound
(b) element
(c) electrolyte
(d) mixture

ANSWER

EXPLANATION

12. Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products ?

(a) Television
(b) Refrigerator
(c) Tube light
(d) Cooking gas

ANSWER

EXPLANATION

13. Balloons are filled with :

(a) nitrogen
(b) helium
(c) oxygen
(d) argon

ANSWER

EXPLANATION

14. Which metal pollute the air of a big city ?

(a) Copper
(b) Chromium
(c) Lead
(d) Cadmium

ANSWER

EXPLANATION

15. Which of the following metals remain in liquid for under normal conditions ?

(a) Radium
(b) Zinc
(c) Uranium
(d) Mercury

ANSWER

EXPLANATION


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