Question

8. Which are bad conductors of hest?
i) rubber
ii) bronze
iii) Olygen
iv) mercury
a(i) and(ii)
b(ii) and (iii)
c(iii) and (iv)
d(i) and (iii)
9. In which of the following groups can each
thing be classified as opaque?

(i) coin, eraser, tennis ball
(ii) twig, tap water, empty plastic
container
(iii) clear glass, cardboard, wheat flour
(iv) milk, cardboard, iron
and
a) (i)and(ii)
b) (ii) and (iv)
c) (ii)and (iii)
d) (i)and (iv)

10. The density of a substance is the
a) amount of matter in it
b) space occupied by it
C) volume of a unit mass of the substance
d) mass in a unit volume of the substance
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Answer 1

Answer:

8. a ,9.d ,10 .d

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