Which of the following statements are True (T) or False (F)? Mark them and select the answer from the codes given below.
(I) Ozone is not responsible for greenhouse effect.
(II) Ozone can oxidize SO₂ present in the atmosphere to SO₃
(III) Ozone hole is thinning of ozone layer present in stratosphere.
(IV) Ozone is produced in the upper stratosphere by the action of UV rays on oxygen.

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I-F, II-T, III-T, IV-T

I-F, II-F, III-T, IV-T

I-T, II-T, III-F, IV-F

I-T, II-F, III-T, IV-F

answer is A.

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Detailed Solution

(I) There are several gases that are even stronger IR absorbers than CO₂. These are CH₄, O₃, N₂ and CFC.
Thus, these gases are responsible for greenhouse effect.
Thus, given statement is false.

$\begin{array}{l} (II) {SO}_{2} + O_{3} \overset{}{\to} {SO}_{3} + O_{2} (True) \\ (III) (True) \\ (IV) O_{2} \to_{λ < 2420 \overset{o}{A}}^{hv} 2 [O] \\ O_{2} + O \overset{}{\to} O_{3} (True) \end{array}$

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