Question

When S02 gas is passed through saturated solution of H2S, which of the following reaction occurs?​

Answer 1

Answer:

H2O

Explanation:

First you need to see which substance has hydrogen before reaction and which one has later. Thus H2S has hydrogen. Now see which product has hydrogen, i.e. H2O. See where O comes from. O comes from SO2. thus SO2 is reduced to H2O and H2S is oxidised to H2O. Always keep in your memory that oxidisation is reverse of reduction.

Answer 2

Explanation:

when S02 gas is passes through saturated solution H2S the following reaction occurs

S02+2H2S=2H20+3s

S02 is a oxiding agent