Embibe Experts Solutions for Chapter: Solutions, Exercise 2: Exercise-2

What volume (in $\mathrm{mL}$) of $90\%$ alcohol by weight $\left(\mathrm{d}=0.8{\mathrm{gmL}}^{-1}\right)$ must be used to prepare $80\mathrm{mL}$  of  $10\%$  alcohol by weight $\left(\mathrm{d}=0.9{\mathrm{gmL}}^{-1}\right)$ ?

When $1 \mathrm{L}$ of $0.1 \mathrm{M}$ sulphuric acid solution is allowed to react with $1 \mathrm{L}$ of $0.1 \mathrm{M}$ sodium hydroxide solution, the amount of sodium sulphate (anhydrous) that can be obtained from the solution formed and the concentration of ${\mathrm{H}}^{+}$ in the solution respectively are:

A sample of air is saturated with benzene(vapour pressure $=100 \mathrm{mm} \mathrm{of} \mathrm{Hg}$ at $298 \mathrm{K}$) at $298 \mathrm{K}, 750 \mathrm{mm} \mathrm{of} \mathrm{Hg}$ pressure. If it is isothermally compressed to one third of its initial volume, the final pressure of the system is

If vapour pressures of pure liquids '$\mathrm{A}$' and '$\mathrm{B}$' are $300$ and $800 \mathrm{torr}$ respectively at $25°\mathrm{C}$. When these two liquids are mixed at this temperature to form a solution in which mole percentage of '$\mathrm{B}$' is $92$, then the total vapour pressure is observed to be $0.95 \mathrm{atm}$. Which of the following is true for this solution?

Two liquids $\mathrm{X}$ and $\mathrm{Y}$ are perfectly immiscible. If $\mathrm{X}$ and $\mathrm{Y}$ have molecular masses in ratio $1 : 2,$ the total vapour pressure of a mixture of $\mathrm{X}$ and $\mathrm{Y}$ prepared in weight ratio $2 : 3$ should be $\left({\mathrm{Px}}^0=400\right.$ $\mathrm{torr}$, ${\mathrm{P}}_{\mathrm{y}}^0=200$ $\mathrm{torr}$):

$2 \mathrm{g}$ of non-volatile hydrocarbon solute dissolved in $100 \mathrm{g}$ of hypothetical organic solvent $(\mathrm{molar} \mathrm{mass} = 50)$was found to lower vapour pressure from $75.50 \mathrm{to} 75 \mathrm{mm} \mathrm{of} \mathrm{Hg} \mathrm{at} 20°\mathrm{C}$. Given that hydrocarbon contains $96\% \mathrm{of} \mathrm{C}.$ Then which of the following are true?

In the depression of freezing point experiment, it is found that the

 Which facts are true when we use Van't Hoff equation $\mathrm{PV} = \mathrm{nST}$ for osmotic pressure $\mathrm{P}$ of dilute solution?