General Science – Exercise – 1

16. Which of the following substances is a bad conductor of electricity but a good conductor of heat ?

(a) Mica
(b) Perspex
(c) Celluloid
(d) Asbestos

Answer
Answer : (a)
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17. Which of the following is a non metal that remains liquid at room temperature?

(a) Phosphorous
(b) Bromine
(c) Chlorine
(d) Helium

Answer
Answer : (b)
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18. Chlorophyll is a naturally occurring chelate compound in which central metal is

(a) copper
(b) magnesium
(c) iron
(d) calcium

Answer
Answer : (b)
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19. Which of the following metals forms an amalgam with other metals?

(a) Tin
(b) Mercury
(c) Lead
(d) Zinc

Answer
Answer : (b)
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20. Which of the following is used in pencils?

(a) Graphite
(b) Silicon
(c) Charcoal
(d) Phosphorous

Answer
Answer : (a)
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