Question

$H_{2}S$ is acidic in nature while $H_{2}O$ is neutral in nature. Give reason.

• A. Oxygen is more electronegative than sulphur.
• B. $H-S$ bond is weaker than $O-H$ bond.
• C. Bond angle in $H_{2}S$ is less than that in $H_{2}O$.
• D. $H-S$ bond is stronger than $O-H$ bond.

Answer 1

The correct option is B $H-S$ bond is weaker than $O-H$ bond.

In S-H there is 2p-3p orbital overlap and in O-H the overlap is of 2p-2p orbital so the S-H bond is weaker and O-H bond is stronger.