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Q.

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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a

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

b

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

c

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

d

I-T, II-T, III-F, 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.II SO2 +O3 → SO3 +O2 TrueIII TrueIV O2 →λ < 2420 Aohv 2OO2 +O → O3 True

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