If pK_a = , - ,log K_a=4 for a weak acid HX and K_a= C ^2 then Va… - Vidyadip

MCQ

If $pK_a =\, -\,log K_a=4$ for a weak acid $HX$ and $K_a= C\alpha ^2$ then Van't Haff factor when $C = 0.01\,M$ is

A
$1.01$
B
$1.02$
✓
$1.10$
D
$0.20$

✓

Answer

Correct option: C.

$1.10$

c
$\mathrm{K}_{\mathrm{a}}=\mathrm{c} \alpha^{2}$

$\alpha=\sqrt{\frac{\mathrm{K}_{\mathrm{a}}}{\mathrm{c}}} $ $=\sqrt{\frac{10^{-4}}{10^{-2}}}$

$=10^{-1}=0.1$

$\mathrm{i}=1-\alpha+\mathrm{n} \alpha=1-0.1+2 \times 0.1=1.1$

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 6.2. Equilibrium - II (icon Equilibrium)→6.2. Equilibrium - II (icon Equilibrium) — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

$\text{IUPAC}$ name of the compound: $\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\\\text{CH}_3-(\text{CH}_2)_4-\text{CH}-\text{C}-\text{CH}_3\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{C}_2\text{H}_5(\text{CH}_2)_2-\text{CH}_3$

For the decomposition of the compound, represented as $N{H_2}COON{H_4}\left( s \right) \rightleftharpoons 2N{H_3}\left( g \right) + C{O_2}\left( g \right)$ the $K_p\, =2.9\times10^{- 5}\, atm^3$ . If the reaction is started with $1\, mol$ of the compound, the total pressure at equilibrium would be............$\times10^{-2}\, atm$

Correct order of nucleophilicity

The number of nodal planes (planes of zero electron density) in the $d_{xy}$ orbital is.

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

In $sp$ hybridisation, shape is

Which of the following statements is$/$are correct about fuel cells?

Which one of the following compounds is aromatic in nature ?

In the sixth period, the orbitals being filled are :-

For the electrolytic refining of aluminium, the three fused layers consist of

Bottom Layer

Middle Layer

Upper Layer