p-block Questions

Taking stability as the factor, which one of the following represents correct relationship?

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:Assertion A: Helium is used to dilute oxygen in diving apparatus.Reason R: Helium has high solubility in ${\text{O}}_2$.In the light of the above statements, choose the correct answer:

Match List-I with List-II:| List-I | List-II || :--- | :--- || A. Coke | I. Carbon atoms are $s{p}^3$ hybridised || B. Diamond | II. Used as a dry lubricant || C. Fullerene | III. Used as a reducing agent || D. Graphite | IV. Cage-like molecules |

Match List-I with List–II:| List-I (Oxoacids of Sulphur) | List-II (Bonds) || :--- | :--- || A. Peroxodisulphuric acid | I. Two $\text{S-OH}$, Four $\text{S=O}$, One $\text{S-O-S}$ || B. Sulphuric acid | II. Two $\text{S-OH}$, One $\text{S=O}$ || C. Pyrosulphuric acid | III. Two $\text{S-OH}$, Four $\text{S=O}$, One $\text{S-O-O-S}$ || D. Sulphurous acid | IV. Two $\text{S-OH}$, Two $\text{S=O}$ |