KCET (UG) 2018

Which of the following aqueous solutions should have the highest boiling point?

Henry's law constant for the solubility of ${\mathrm{N}}_2$ gas in water at $298 \mathrm{K}$ is $1.0\times {10}^5$ atm. The mole fraction of ${\mathrm{N}}_2$ in air is $0.8$ The number of moles of ${\mathrm{N}}_2$ from air dissolved in $10$ moles of water at $298 \mathrm{K}$ and $5$ atm pressure is

Choose the correct statement

The ${\mathrm{K}}_{\mathrm{H}}$ value $(\mathrm{K}$ bar) of argon $\left(\mathrm{I}\right),$ carbon dioxide $\left(\mathrm{II}\right)$, formaldehyde $\left(\mathrm{III}\right)$ and methane $\left(\mathrm{IV}\right)$ are respectively $40.3, 1.67, 1.83\times {10}^{-5}$ and $0.413$ at $298 \mathrm{K}.$ The increasing order of solubility of gas in liquid is

The vapour pressure of pure liquids $\mathrm{A}$ and $\mathrm{B}$ are $450$ and $700 \mathrm{mm}$ of $\mathrm{Hg}$ at $350 \mathrm{K}$ respectively. If the total vapour pressure of the mixture is $600 \mathrm{mm}$ of $\mathrm{Hg},$ the composition of the mixture in the solution is

Solute $\text{'}\mathrm{X}\text{'}$ dimerises in water to the extent of $80\%$. $2.5 \mathrm{g}$ of $\text{'}\mathrm{X}\text{'}$ in $100 \mathrm{g}$ of water increases the boiling point by $0.3°\mathrm{C}$. The molar mass of $\text{'}\mathrm{X}\text{'}$ is
$\left[{\mathrm{K}}_{\mathrm{b}}=0.52 \mathrm{K} {\mathrm{kgmol}}^{-1}\right]$

Which of the following pair of solutions is isotonic?

Isotonic solutions are solutions having the same