Embibe Experts Solutions for Chapter: Solutions, Exercise 3: Level 3

$0.3$ Molal aqueous solution of sucrose boils at $100.{51}^0\mathrm{C}$. The boiling point of $0.7$ molal aqueous solution of sucrose will be______.       

A solution contains $0.524 \mathrm{g}$ of camphor $\left(\mathrm{molar} \mathrm{mass} = 152 \mathrm{g} {\mathrm{mol}}^{-1}\right)$  dissolved in $36.8 \mathrm{g}$ of ether(boiling point $=34.6^0\mathrm{C}$). The molal elevation constant of ether is ${\text{1.94 K kg mol}}^{\text{-1}}$. The boiling point of the solution is______  

$0.1 \mathrm{M}$ solution each of glucose, sodium chloride, sodium sulphate and sodium phosphate are taken; the ratio of depression in freezing point is______ 

The depression in freezing point of a $5\%$ aqueous solution of a substance '$\mathrm{A}$’ is equal to the depression in freezing point of a $3\%$ aqueous solution of a substance '$\mathrm{B}$’ If the molecular weight of $\mathrm{B}$ is $72 \mathrm{g} {\mathrm{mol}}^{-1}$, then the molecular weight of $\mathrm{A}$ is______.

The depression of the freezing point of a solvent(boiling point $303 \mathrm{K}$) for a particular solution is $0.153 \mathrm{K}$. Calculate the molal elevation constant, if the boiling point of the solution is $304.52 \mathrm{K}$.(${\text{K}}_{\text{f}}{\text{=1.68 K kg mol}}^{\text{-1}}$)

A solution containing $3.56 \mathrm{g}$ of a polymer in $1$ litre of a solvent was found to have an osmotic pressure of ${\text{5.2×10}}^{\text{-4}}$ atmosphere at $300 \mathrm{K}$. The molecular mass of the polymer is_____.
${\text{(R=0.082 L atm mol}}^{\text{-1}}{\text{ K}}^{\text{-1}}\text{)}$

A solution of glucose containing $9.2 \mathrm{g} {\mathrm{L}}^{-1}$ (molecular weight : $\text{180 g/mol}$) is isotonic with $3\%$ solution of a non-volatile solute. The molecular weight of the solute will be_____.

If density of a solvent is greater than ${\text{1 kg dm}}^{\text{-3}}$, then the molarity $\left(\mathrm{M}\right)$ and molality $\left(\mathrm{m}\right)$ are related as_____.