Question

Which of the following are true regarding CO₂?

(A) Excess of CO₂ acts as a pollutant.

(B) Plants take in CO₂ for photosynthesis.

(C) Deforestation leads to decrease in the amount of CO₂ in air.

(D) Less quantity of CO₂ 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 CO₂ are as follows:

(1) Excess of CO₂ acts as a pollutant because CO₂ is a greenhouse gas which causes global warming.

(2) Plants take in CO₂ for photosynthesis in the daytime and produce food.

(3) Deforestation leads to increase in the amount of CO₂ in air due to lack of CO₂ intake by plants.

(4) CO₂ traps heat resulting in an increase in the average temperature of Earth.