Number of unpaired electrons in `Mn^(2+)` is

Answer

A,B,C,D

Explanation

`N_2(g)+O_2(g)hArr 2NO(g)`
(A)For changing pressure volume has to be changed, though number of moles of NO(g) do not get changed but its concentration will get changed.
(B)Temperature change will change `K_P` and hence concentration.
( C)Volume change will change concentration, not the number of moles.
(D)Catalyst does not change equilibrium concentrations.