Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 1>Q 37

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IMPORTANT

Earn 100

At a constant temperature, $ΔS$ will be the maximum for which of the following processes:

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Important Questions on Solutions

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IMPORTANT

Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 1>Q 38

The vapour pressure of a pure liquid solvent

A

is

0.80 atm

. When a non-volatile substance

B

is added to the solvent, its vapour pressure drops to

0.60 atm

. Mole fraction of the component

B

in the solution is:

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Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 1>Q 39

Mixture of the volatile components

A

and

B

has the total vapour pressure (in

Torr

)

p = 254 - 119 x_{A}

where

x_{A}

is the mole fraction of

A

in the mixture. Hence

p_{A}^{°}

and

p_{B}^{°}

are: (in

Torr

)

HARD

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 1>Q 40

At

300 K

the vapour pressure of two pure liquids,

A

and

B

are

100

and

500 mmHg

, respectively. If in a mixture of

A

and

B

, the vapour pressure is

300 mmHg

, the mole fractions of

A

in the liquid and in the vapour phase, respectively, are

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Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 1>Q 41

Which of the following will increase with the increase in temperature?

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Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 1>Q 42

When an ideal binary solution is in equilibrium with its vapour, the molar ratio of the two components in the solution and in the vapour phases will be:

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Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 1>Q 43

Vapour pressure of a solution of

5 g

of non-electrolyte in

100 g

of water at a particular temperature is

2985 N m^{- 2}

. The vapour pressure of pure water is

3000 N m^{- 2}

, then the molecular weight of the solute(in

g

) is

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Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 1>Q 44

A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of

290 mm

at

300 K

. The vapour pressure of propyl alcohol is

200 mm

. If the mole fraction of ethyl alcohol is

0.6

, its vapour pressure (in

mm

) at the same temperature will be

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Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 1>Q 45

$A$ solution $X$ contains $12 g$ of urea per litre of water. Another solution $Y$ contains $68.4 g$ of cane sugar per litre of water at the same temperature. The ratio of lowering of vapour pressure in solution $X$ and $Y$ is

$(N = 14 u, C = 12 u, O = 16 u, H = 1 u)$