Which of the following statement is wrong ?

Options

A. The stability of hydrides increases from `NH_3` to `BiH_3` in group 15 of the periodic table.
B. Nitrogen cannot form dn - pn bond.
C. Single N - N bond is weaker than the single P-P bond.
D. `N_2O_4` has two resonance structure.

Answer

A

Explanation

The stability of hydrides increases from `NH_3` to `BiH_3` in group 15 of the periodic table.
Thermal stability decreases gradually from `NH_3` to `BiH_3`. So the stability also decreases.
`NH_3 PH_3 AsH_3 SbH_3 BiH_3`
Decomposition 1300°C 440°C 280°C 150°C room temperature temp.
The size of the central atom increases from N to Bi therefore, the tendency to form a stable covalent bond with small atom like hydrogen decreases and therefore, stability decreases.