Question

EXERCISES
A. Choose the correct option(s) in each.
1. You have kept water in a closed bottle for a long
time. After some time you observe patches in
the sides of the bottle as well as on water. The
colour of these patches would be
(a) black (b) blue (c) green (d) brown
2. You are not advised to burn something in a
closed room because
(a) due to incomplete combustion, a poisonous
gas, carbon monoxide is released
(b) excess of carbon dioxide suffocates
(c) smoke suffocates
(d) it consumes the whole of the oxygen and
the man cannot breathe
3. Yellowing of the marble walls of Taj Mahal is
due to:
(a) depletion of ozone layer
(b) greenhouse
(c) global warming (d) acid rain
4. CNG stands for:
(a) Compressed Natural Gasoline
(b) Compressed Natural Gas

New Learning Science 8​

Answer 1

Answer:

1.(b) blue

2.(a)

3.(d)

4.(b)

Answer 2

1. (b) blue
2. (D)
3. (c) global warming
4. (b) compressed natural gas

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