Ncert Exercises & Solutions

Which of the following statements are correct for SO₂ gas?

a.	It acts as a bleaching agent in moist conditions.
b.	Its molecule has linear geometry.
c.	Its dilute solution is used as a disinfectant.
d.	It can be prepared by the reaction of dilute H₂SO₄ with metal sulphide.

1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)

Hint: SO₂ does not have linear geometry it has a bent shape

(a). In moist conditions SO₂ gas acts as a bleaching agent. It is a correct statement

(b) The structure of SO₂ is bent, not linear due to the bond pair-lone pair repulsion structure is as follows:

Hence, second statement is incorrect.

(c). Its dilute solution is used as a disinfectant. The third statement is correct.

(d). It can be prepared by the reaction of O₂ with sulphide ore

4 FeS₂ + 11O₂ → 2Fe₂O₃ + 8 SO₂

while metal on treatment with H₂SO₄ produces H₂S.

Hence, statement d is incorrect.

Hence, option 4th is the correct answer