The correct order of spin-only magnetic moments among the following is :
(Atomic number : Mn = 25, Co = 27, Ni = 28, Zn = 30)

The correct order of electron affinity is :

In KO₂, the nature of oxygen species and the oxydation state of oxygen atom are, respectively :

At a certain temperature in a $$5$$ $$L$$ vessel, 2 moles of carbon monoxide and 3 moles of chlorine were allowed to reach equilibrium according to the reaction,
         CO + Cl₂ $$\rightleftharpoons$$ COCl₂
At equilibrium, if one mole of CO is present then equilibrium constant (K_c) for the reaction is :