1
WB JEE 2024
MCQ (Single Correct Answer)
+2
-0.5
Change Language

The specific conductance $$(\mathrm{k})$$ of $$0.02(\mathrm{M})$$ aqueous acetic acid solution at $$298 \mathrm{~K}$$ is $$1.65 \times 10^{-4} \mathrm{~S} \mathrm{~cm}^{-1}$$. The degree of dissociation of acetic acid is

$$[\lambda_{\mathrm{O}^{+}}+=349.1 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1} \text { and } \lambda_{{ }^{\circ} \mathrm{CH}_3 \mathrm{COO}^{-}}=40.9 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}]$$

A
0.021
B
0.21
C
0.012
D
0.12
2
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

At STP, the dissociation reaction of water is $$\mathrm{H_2O\rightleftharpoons H^+~(aq.)+OH^-~(aq.)}$$, and the pH of water is 7.0. The change of standard free energy ($$\Delta$$G$$^\circ$$) for the above dissociation process is given by

A
20301 cal/mol
B
19091 cal/mol
C
20096 cal/mol
D
21301 cal/mol
3
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
Solubility products (Ksp) of the salts of types MX, MX2 and M3X at temperature T are 4.0 $$\times$$ 10$$-$$8, 3.2 $$\times$$ 10$$-$$14 and 2.7 $$\times$$ 10$$-$$15 respectively. Solubilities (in mol dm$$-$$3) of the salts at temperature T are in the order.
A
MX > MX2 > M3X
B
M3X > MX2 > MX
C
MX2 > M3X > MX
D
MX > M3X > MX2
4
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
A saturated solution of BaSO4 at 25$$^\circ$$C is 4 $$\times$$ 10$$-$$5 M. The solubility of BaSO4 in 0.1 M Na2SO4 at this temperature will be
A
1.6 $$\times$$ 10$$-$$9 M
B
1.6 $$\times$$ 10$$-$$8 M
C
4 $$\times$$ 10$$-$$6 M
D
4 $$\times$$ 10$$-$$4 M
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