Question

Which one is the strongest reducing agent?

Options

• HF

• HCl

• HBr

• HI

Answer 1

HI

Explanation:

The reducing power of hydrogen halides increases from HF to HI because the H-X bond strength decreases down the group. HI has the weakest H-I bond, so it dissociates easily to release hydrogen and acts as the strongest reducing agent. In contrast, HF has a very strong H-F bond and does not show reducing properties.