Explain why, sulphur dioxide is a more powerful reducing agent in the alkaline medium than in the acidic medium.

Options

A. Statement-1 and statement-2 are correct and statement-2 is the correct explanation for Statement-1
B. Statement-1 is True, Statement-2 are correct but statement-2 is NOT a correct explanation for Statement-1
C. Statement-1 is correct, but statement-2 is False.
D. Statement-1 is False, but Statement-2 is correct.

Answer

B

Explanation

`S_1:2H_2O+SO_2 hArr SO_4^(2-)+4H^(+)+2e^(-)`(increase in `[H^+]` will shift the equilibrium in backward direction )
`SO_2 +4OH^(-)hArr SO_4^(2-)+2H_2O+2e^(-)`(increase in `[OH^-]` will shift the equilibrium in forward direction )
`S_2:2H_2S+SO_2 overset("moisture")to2H_2O +3S darr`