Two pi and half sigma bonds are present in:

Number of paramagnetic oxides among the following given oxides is $\_\_\_\_\_\_\_\_\_\_\_.$

${\mathrm{Li}}_2\mathrm{O}, \mathrm{CaO}, {\mathrm{Na}}_2{\mathrm{O}}_2, {\mathrm{KO}}_2, \mathrm{MgO}$ and ${\mathrm{K}}_2\mathrm{O}$

The spin-only magnetic moment value of ${\mathrm{B}}_2^{+}$ species is $\times {10}^{-2}\mathrm{BM}$ (Nearest integer)

$[\text{ Given : }\sqrt{3}=1.73]$

Match List - I with List - II :

Choose the most appropriate answer from the options given below

Which of the following statements are correct ?

(A) Both $\mathrm{LiCl}$ and ${\mathrm{MgCl}}_2$ are soluble in ethanol.

(B) The oxides ${\mathrm{Li}}_2\mathrm{O}$ and $\mathrm{MgO}$ combine with excess of oxygen to give superoxide.

(C) $\mathrm{LiF}$ is less soluble in water than other alkali metal fluorides.

(D) ${\mathrm{Li}}_2\mathrm{O}$ is more soluble in water than other alkali metal oxides.

Choose the most appropriate answer from the options given below