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

Given below are two statements.

Statement I: The presence of weaker $\mathrm{\pi }$-bonds make alkenes less stable than alkanes

Statement II: The strength of the double bond is greater than that of carbon-carbon single bond.

In the light of the above statements, choose the correct answer from the options : given below.

Bonding in which of the following diatomic molecule(s) become(s) stronger, on the basis of $\mathrm{MO}$ Theory, by removal of an electron?

(A) $\mathrm{NO}$

(B) ${\mathrm{N}}_2$

(C) ${\mathrm{O}}_2$

(D) ${\mathrm{C}}_2$

(E) ${\mathrm{B}}_2$

Choose the most appropriate answer from the options given below :