Molarity (M) of an aqueous solution containing x g of anhyd. CuSO… - Vidyadip

MCQ

Molarity $(M)$ of an aqueous solution containing $\mathrm{x} g$ of anhyd. $\mathrm{CuSO}_4$ in $500 \mathrm{~mL}$ solution at $32^{\circ} \mathrm{C}$ is $2 \times 10^{-1} \mathrm{M}$. Its molality will be. . . . . .$\times 10^{-3} \mathrm{~m}$ (nearest integer). [Given density of the solution $=1.25 \mathrm{~g} / \mathrm{mL}$.]

A
$160$
✓
$164$
C
$167$
D
$168$

✓

Answer

Correct option: B.

$164$

b
$\mathrm{M}_{\mathrm{rol}^{\mathrm{n}}}=\mathrm{v}_{\mathrm{sol}^{\mathrm{n}}} \times \mathrm{d}_{\mathrm{sol}^{\mathrm{n}}}$

$=500 \times 1.25=625 \mathrm{~g}$

$\text { Mass of solute }(x)=0.2 \times 0.5 \times 159.5$

$=15.95$

$\mathrm{n}_{\text {solute }}=0.1 \text {, }$

$\text { Mass of solvent }=\text { Mass of solution }- \text { Mass of solute }$

$=625-15.95$

$=609.05$

$\mathrm{~m}=\frac{0.1}{\frac{609.05}{1000}}$

$\mathrm{~m}=0.164=164 \times 10^{-3}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 1. Some basic concept of chemistry→1. Some basic concept of chemistry — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The shape of ${H_3}{O^ + }$ ion is

Silicate having one monovalent comer oxygen atom in each tetrahedron unit is

The solution of $A$ and $B$ are $0.1$ and $0.2$ molar in a substance. If $100\ \ce{ML}$ of $'A\ '$ are mixed with $25\ mL$ of $B$ and there is no change in volume, then the final molarity of solution is :

Elements of which of the following group$(s)$ of periodic table do not form hydrides?

The $IUPAC$ name of ethylidene chloride is ..... .

As a result of $sp$ hybridization, we get

The equilibrium constants of the following are

$N_2 + 3H_2 \rightleftharpoons 2NH_3 \,;$ $K_1$

$N_2 + O_2 \rightleftharpoons 2NO\,;$ $K_2$

$H_2 + 2 O_2 \rightleftharpoons H_2O\,;$ $K_3$

The equilibrium constant $(K)$ of the reaction :

$2NH_3 + \frac{5}{2} \overset K \leftrightarrows 2NO + 3H_2O$

The de-Broglie equation applies

Find the value of wave number of $(\bar v)$ in terms of Rydberg's constant, when transition of electron takes place between two levels of $He^+$ ion whose sum is $4$ and difference is $2$