In the following reactions,

the structure of the major product 'X' is

Extractions of zinc from zinc blende is achieved by

Among the following,the paramagnetic compound is

The species having bond order different from that in CO is

Argon is used in are welding because of its

STATEMENT-1: Boron always forms covalent bond.
because
STATEMENT-2: The small size of $B^{3+}$ favours formation of covalent bond.

The structure of $Xe{O}_3$ is

The value of ${\text{log}}_{!0}$ K for a reaction $A\iff B$ is (Given : ${\Delta }_4{H}_{298K}^{\circ }=-54.07kJ{\text{mol}}^{-1},{\Delta }_r{S}_{298K}^{\circ }=10J{K}^{-1}{\text{mol}}^{-1}$ and R=8.314$J{K}^{-1}{\text{mol}}^{-1}$: 2.303$\times 8.314\times 298=5705$)

The reagent(s) for the following conversion,

is/are

Match the complexes in Column I with their properties listed in Column II. Indicate your answer by darkening the appropriate bubbles of the $4\times 4$ matrix given in the ORS.