Question

Among the gases (I) – (V), the gases that cause the greenhouse effect are:

(I) ${\mathrm{CO}}_2$

(II) ${\mathrm{H}}_2\mathrm{O}$

(III) $\mathrm{CFCs}$

(IV) ${\mathrm{O}}_2$

(V) ${\mathrm{O}}_3$

• A. (I), (II), (III) and (IV)
• B. (I) and (IV)
• C. (I), (II), (IV) and (V)
• D. (I), (II), (III) and (V)

Answer 1

The correct option is D

(I), (II), (III) and (V)

The explanation for the correct option:

(D)

1. The greenhouse gases are the gases that produce the greenhouse effect.
2. The greenhouse effect is the warming of the Earth's surface due to the continuous releasing of some gases such as water vapour(${\mathrm{H}}_2\mathrm{O}$), Carbon dioxide(${\mathrm{CO}}_2$), Methane(${\mathrm{CH}}_4$), $\mathrm{CFCs}$ and ${\mathrm{O}}_3$ through the continuous overexploitation of resources.

Therefore, ${\mathrm{H}}_2\mathrm{O},{\mathrm{CO}}_2,{\mathrm{O}}_3$ and $\mathrm{CFCs}$ are greenhouse gases.

The explanation for the incorrect option:

(A): The oxygen(${\mathrm{O}}_2$) gas humans inhale for their survival is not a greenhouse gas. Hence, option (A) is incorrect.

(B): The oxygen(${\mathrm{O}}_2$) gas humans inhale for their survival is not a greenhouse gas. Hence, option (B) is incorrect.

(B): The oxygen(${\mathrm{O}}_2$) gas humans inhale for their survival is not a greenhouse gas. Hence, option (C) is incorrect.

Hence, option (D) is correct.