Question

The correct statement with respect to dinitrogen is

• A. Liquid dinitrogen is not used in cryosurgery
• B. It can combine with dioxygen at ${25}^{o}C$
• C. $N_2$ is paramagnetic in nature
• D. It can be used as an inert diluent for reactive chemicals

Answer 1

The correct option is D It can be used as an inert diluent for reactive chemicals

Electronic configuration of $N_2$:
$\sigma 1s^2{\sigma }^{\ast }1s^2\sigma 2s^2{\sigma }^{\ast }2s^2\pi 2p_y^2\pi 2p_z^2\sigma 2p_x^2$
All the electrons are paired. So,
$N_2$ is diamagnetic in nature.


$N_2+O_2\stackrel{2000K}{\rightleftharpoons }NO\left(g\right)$

Because of its inertness it is used where an inert atmosphere is required.
Option (b) is correct
Nitrogen and oxygen react at very high temperatures, not room temperature. Liquid nitrogen is used in cryosurgery