WB JEE 2022 | Liquid Solution Question 2 | Chemistry

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WB JEE 2022

MCQ (Single Correct Answer)

-0.5

Pick the correct statement.

Relative lowering of vapour pressure is independent of T.

Osmotic pressure always depends on the nature of solute.

Elevation of boiling point is independent of nature of the solvent.

Lowering of freezing point is proportional to the molar concentration of solute.

WB JEE 2021

MCQ (Single Correct Answer)

-0.25

When 20 g of naphthoic acid (C₁₁H₈O₂) is dissolved in 50 g of benzene, a freezing point depression of 2K is observed. The van't Hoff factor (i) is [K_f = 1.72 K kg mol^$$-$$1]

0.5

1.0

2.0

3.0

WB JEE 2020

MCQ (Single Correct Answer)

-0.25

Equal masses of ethane and hydrogen are mixed in an empty container at 298 K. The fraction of total pressure exerted by hydrogen is

15:16

1:1

1:4

1:6

WB JEE 2020

MCQ (Single Correct Answer)

-0.25

K_f (water) = 1.86 K kg mol^-1. The temperature at which ice begins to separate from a mixture of 10 mass % ethylene glycol is

$$ - $$1.86 $$^\circ $$C

$$ - $$3.72 $$^\circ $$C

$$ - $$3.3 $$^\circ $$C

$$ - $$3 $$^\circ $$C

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