The strongest reducing agent among the following is:

Question

Canvas Classes · Accepted Answer

The reducing power of Group 15 hydrides increases down the group:

This is because:
- The E–H bond strength decreases down the group (larger atoms, weaker bonds)
- Weaker E–H bonds are more easily broken → easier to donate electrons → stronger reducing agent

has the weakest Bi–H bonds → strongest reducing agent.

Answer: Option (3) —

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