Match the items of Columns I and II and mark the correct option.
| Column I | Column II | ||
|---|---|---|---|
| A. | Its partial hydrolysis does not change oxidation state of central atom. | 1. | He |
| B. | It is used in modern diving apparatus. | 2. | XeF$_6$ |
| C. | It is used to provide inert atmosphere for filling electrical bulbs. | 3. | XeF$_4$ |
| D. | Its central atom is in $sp^3 d^2$ hybridisation. | 4. | Ar |
Assertion (A) $\mathrm{N}_2$ is less reactive than $\mathrm{P}_4$.
Reason (R) Nitrogen has more electron gain enthalpy than phosphorus.
Assertion (A) $\mathrm{HNO}_3$ makes iron passive.
Reason (R) $\mathrm{HNO}_3$ forms a protective layer of ferric nitrate on the surface of iron.
Assertion (A) HI cannot be prepared by the reaction of KI with concentrated $\mathrm{H}_2 \mathrm{SO}_4$.
Reason $(\mathrm{R}) \mathrm{HI}$ has lowest $\mathrm{H}-\mathrm{X}$ bond strength among halogen acids.
Assertion (A) Both rhombic and monoclinic sulphur exist as $S_8$ but oxygen exists as $\mathrm{O}_2$.
Reason (R) 0xygen forms $p \pi$ - $p \pi$ multiple bond due to small size and small bond length but $p \pi-p \pi$ bonding is not possible in sulphur.