Question

Account for the following :

1. BiH₃ is the strongest reducing agent among all the hydrides of group 15 elements.

2. Bleaching action of chlorine.

Answer 1

1. It is because BiH₃ is least stable among the hydrides of group 15 elements.

2. Bleaching action of chlorine is due to oxidation. The nacent oxygen ([O]) produced is responsible for the bleaching action.

CI₂ + H₂O → 2HCI + [O]

Coloured substance + [O] → Colourless substance