Excess of ammonia with sodium hypochlorite solution in the presence of glue or gelatine gives:

Which of the following statements is not true for nitrogen?

What happens when excess water is added to a solution of $BiCl_3$?

The decreasing values of bond angles from $NH_3$ $(106^o)$ to $SbH_3$ $(101^o)$ down group-$15$ of the periodic table is due to

First ionisation enthalpy values of first four group $15$ elements are given below. Choose the correct value for the element that is a main component of apatite family $:$

Basicity of phosphinic acid is