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  • Which of the following statements are correct for SO_{2} gas? (i) It acts as a bleaching agent in moist conditions. (ii) Its molecule has linear geometry. (iii) Its dilute solution is used as a disinfectant.

Which of the following statements are correct for SO_{2} gas?

(i) It acts as a bleaching agent in moist conditions.

(ii) Its molecule has linear geometry.

(iii) Its dilute solution is used as a disinfectant.

(iv) It can be prepared by the reaction of dilute H_{2}SO_{4} with metal sulphide.

Answers (1)

The answer is the option (i, iii). SO_{2} is used as a bleaching agent in presence of moisture because of the reducing nature of SO_{2}

SO_{2}+2H_{2}O\rightarrow H_{2}SO_{4}+2H

It is also used as a preservative, disinfectant and anti-chlor.

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