Choose the correct statement with respect to the vapour pressure of a liquid among the following :

Increases non-linearly with increasing temperature

Decreases non-linearly with increasing temperature

Decreases linearly with increasing temperature

Increases linearly with increasing temperature

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Water and chlorobenzene are immiscible liquids. Their mixture boils at $89 º C$ , under a reduced pressure of $7.7 \times 10^{4} Pa$ . The vapour pressure of pure water at is $89 º C$ $7 \times 10^{4} Pa$ . Weight percent of chlorobenzene in the distillate is

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Important Questions on Solutions

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 12

If two liquids

A (P_{A}^{0} = 100 torr)

and

(P_{B}^{0} = 200 torr)

are completely immiscible with each other (each one will behave independently of the other) are present in a closec vessel. The total vapour pressure of the system will be:

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 14

If vapour pressures of pure liquids '

A

' and '

B

' are

300

and

800 torr

respectively at

25 ° C

. When these two liquids are mixed at this temperature to form a solution in which mole percentage of '

B

' is

92

, then the total vapour pressure is observed to be

0.95 atm

. Which of the following is true for this solution?

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 16

In the following aqueous solutions
A.

1 m

sucrose
B.

1 m

potassium ferricyanide and
C.

1 m

potassium sulphate,
maximum value of vapour pressure of solution is that of

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 20

Two beakers having

20 ml of a 0.05 M

aqueous solution of a non-volatile, non-electrolyte and the other, similar volume of

0.03 M

aqueous solution of

NaCl

, are placed beside each other in a closed enclosure. Determine the volumes in the two beakers when equilibrium is attained. The volume of the solution in the first and second beaker are respectively

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 23

An ideal aqueous solution containing liquid

A (Molecular Weight = 128) 64 %

by weight has a vapour pressure of

145 mm Hg .

If the vapour pressure of

A

x mm of Hg

and that of water is

155 mm Hg

at the same temperature. Then find

x / 5 .

The solution is ideal.

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 24

A

and

B

form ideal solutions at

50 º C, P_{A}^{0}

is half

P_{B}^{0}

. A solution containing

0.2

mole

A

and

0.8

mole

B

has a normal boiling point of

50 º C

. Find

18 \times P_{B}^{0} . (P_{B}^{0}

is in

atm

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 25

The vapour pressure of pure liquid

A at 300 K is 577

Torr and that of pure liquid

B is 390 Torr

. These two compounds form ideal liquid and gaseous mixtures. Consider the equilibrium composition of a mixture in which the mole fraction of

A

in the vapour is

0.35 .

Find the mole

% of A

in liquid.

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 26

How many of the following solutions show negative deviation from Raoult's Law ?

	Liquid $A$	Liquid $B$
$(i)$	$({CH}_{3})_{2} CO$	${CS}_{2}$
$(ii)$	${CCl}_{4}$	$C_{6} H_{6}$
$(iii)$	${CCl}_{4}$	${CHCl}_{3}$
$(iv)$	$H_{2} O$	$C_{2} H_{5} OH$
$(v)$	$(C_{2} H_{5})_{2} O$	$({CH}_{3})_{2} CO$
$(vi)$	${CH}_{3} COOH$	$C_{5} H_{5} N (pyridine)$
$(vii)$	$C_{6} H_{5} {NH}_{2}$	$({CH}_{3})_{2} CO$
$(viii)$	$C_{6} H_{5} Cl$	$C_{6} H_{5} Br$
$(ix)$	Cyclohexane	Ethanol

Water and chlorobenzene are immiscible liquids. Their mixture boils at 89ºC, under a reduced pressure of 7.7 × 104 Pa. The vapour pressure of pure water at is 89ºC 7 × 104 Pa. Weight percent of chlorobenzene in the distillate is

Important Questions on Solutions

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Water and chlorobenzene are immiscible liquids. Their mixture boils at $89 º C$ , under a reduced pressure of $7.7 \times 10^{4} Pa$ . The vapour pressure of pure water at is $89 º C$ $7 \times 10^{4} Pa$ . Weight percent of chlorobenzene in the distillate is