Chelation can occur in:

The increasing order of boiling points of the following compounds is :

Consider the following molecules and statements related to them:

(a) (B) is more likely to be crystaline than (A)

(b) (B) has higher boiling point than (A)

(c) (B) dissolves more readily than (A) in water

Identify the correct option from below:

Given below are two statements: one is labelled as Assertion $\mathrm{A}$ and the other is labelled as Reason $\mathrm{R}$.

Assertion $\mathrm{A}$ : Dipole-dipole interactions are the only non-covalent interactions, resulting in hydrogen bond formation.

Reason $\mathrm{R}$ : Fluorine is the most electronegative element and hydrogen bonds in $\mathrm{HF}$ are symmetrical.

In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements:

Statement $\mathrm{I}$ : $\mathrm{o}$-Nitrophenol is steam volatile due to intramolecular hydrogen bonding.

Statement $\mathrm{II}$ : $\mathrm{o}$-Nitrophenol has high melting due to hydrogen bonding.

In the light of the above statements, choose the most appropriate answer from the options given below: