Question

Which of the following are true regarding $C{O}_2$?
a. Excess of $C{O}_2$ acts as a pollutant.
b. Plants take in $C{O}_2$ for photosynthesis.
c. Deforestation leads to decrease in the amount of $C{O}_2$ in air.
d. Less quantity of $C{O}_2$ causes rise in temperature.

• A. a and b
• B. a, b and d
• C. a, b and c
• D. b and c

Answer 1

The correct option is A

a and b

The correct statements regarding $C{O}_2$ are as follows:
i. Excess of $C{O}_2$ acts as a pollutant because $C{O}_2$ is a greenhouse gas which causes global warming.
ii. Plants take in $C{O}_2$ for photosynthesis in the daytime and produce food.
iii. Deforestation leads to an increase in the amount of $C{O}_2$ in the air.
iv. $C{O}_2$ traps heat resulting in an increase in the average temperature of Earth.