Question

Choose the correct answer for
each of the following.
a. The second most abundant gas present
in the atmosphere is
i, oxygen
ii. carbon dioxide
iii. nitrogen
iv. water vapour
b. Certain bacteria present in soil can
convert atmospheric
into usable compounds.
i. carbon dioxide
ii. nitrogen
iii. oxygen
iv. water vapour
c. Green plants make use of
during the process
of photosynthesis to prepare their
own food.
1. carbon dioxide
ii. oxygen
iii. nitrogen
iv. argon
d. Which of the following is a solid fuel?
i. Diesel
ii. Wood
iii. LPG
iv. Petrol
e. Oxygen is constantly replenished
by green plants through the process
of
i. photosynthesis
ii. respiration
iii. sedimentation
iv. combustion
f. Which of the following measures helps
in maintaining the balance of oxygen
and carbon dioxide in nature?
i. Discourage carpooling
ii. Encourage cutting down of trees
iii. Use of fossil fuels like petrol
and diesel
iv. Use of cleaner fuels like CNG
g. Which of the following metals is used
for electroplating?
i. Sodium
ii. Tin
iii. Magnesium
iv. Calcium​

Answer 1

Answer:

A. carbondioxide

B. oxygen

Answer 2

Answer:

a 1

b 2

c 1

d 2

e 1

f 4

g 1

Explanation:

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