Which of the following compounds would have significant intermolecular hydrogen bonding?

$\mathrm{HF},{\mathrm{CH}}_3\mathrm{OH},{\mathrm{N}}_2{\mathrm{O}}_4,{\mathrm{CH}}_4$

Give the correct order of initials $\mathrm{T}$ or $\mathrm{F}$ for the following statements. Use $\mathrm{T}$ if statement is true and $\mathrm{F}$ if it is false.

${\mathrm{S}}_1:$ $\mathrm{HF}$ boils at a higher temperature than $\mathrm{HCl}$

${\mathrm{S}}_2:$ $\mathrm{HBr}$ boils at lower temperature than $\mathrm{HF}$

${\mathrm{S}}_3:$ Bond length of ${\mathrm{N}}_2$ is less than ${\mathrm{N}}_2^{+}$

${\mathrm{S}}_4:$ ${\mathrm{F}}_2$ has higher boiling point than ${\mathrm{Cl}}_2$

Select the correct statement for the sulphuric acid.

(I) It has high boiling point and viscosity.

(II) There are two types of bond lengths in its bivalent anion.

(III) $\mathrm{p\pi }-\mathrm{d\pi }$ bonding between sulphur and oxygen is observed.

(IV) Sulphur has the same hybridisation that is of boron in diborane.

The solubility of ${\mathrm{N}}_2\mathrm{}\left(\mathrm{g}\right)$ in water exposed to the atmosphere, when the partial pressure is $593\mathrm{}\mathrm{m}\mathrm{m}$, is $5.3\times {10}^{-4}\mathrm{M}$. Its solubility at $760\mathrm{}\mathrm{m}\mathrm{m}$ and at the same temperature is:

Give answer in 2 significant digits with scientific notation.