Explain why `NH_3` is basic but `BiH_3` is only feebly basic.

Explain why PH_3 is basic in nature.

Why is NH_3 more basic than PH_3 ?

Explain the action of basic buffer.

(CH_3)_3 N is basic but (CF_3)_3 N is not basic. Explain.

Explain the following fact : NH_3 is more basic than BiH_3 .

NH_3 is a liquid while PH_3 is a gas. Why?

Assertion : La(OH)_3 is less basic than Lu(OH)_3 . Reason : Basic character of hydroxides of lanthanoids increase on moving from La^(3+) to Lu^(3+) .

La(OH)_3 is more basic than Lu(OH)_3 . Explain.