Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 51

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The experimental molecular weight of ${CH}_{3} COOH$ dissolved in benzene will always be more than its calculated value because the value of Van 't Hoff factor,

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 53

For a binary ideal liquid solution, the total pressure of the solution is given as:

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 54

At

323 K

, the vapour pressure in millimeters of mercury of a methanol-ethanol solution is represented by the equation,

p = 120 X_{A} + 140

, where

X_{A}

is the mole fraction of methanol. Then the value of

\lim_{x_{A} \to 1} (\frac{p}{X_{A}})

is:

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 55

1 mole

of heptane (

V . P . = 92 mm

of

Hg

) was mixed with

4 moles

of octane (

V . P . = 31 mm

of

Hg

). The vapour pressure of resulting ideal solution is:

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 56

The vapour pressure of a pure liquid

A

is

70 torr

at

27^{0} C

. It forms an ideal solution with another liquid

B

. The mole fraction of

B

is

0.2

and the total vapour pressure of the solution is

84 torr

at

27^{0} C

. The vapour pressure of pure liquid

B

at

27^{0} C

is ______.

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 58

Which statement about the composition of vapour over an ideal

1 : 1

molar mixture of benzene and toluene is correct? Assume the temperature is constant at

25 ° C

. Vapour pressure at

25 ° C

:
Benzene

75 mmHg

Toluene

22 mmHg

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 59

The vapour pressure of pure liquid

' A'

at

310 ° C

is

120

torr. The vapour pressure of this liquid in solution with liquid $B$ is

72

torr. Calculate the mole fraction of

' A'

in solution if the mixture obeys Raoult's law.

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 62

Which one of the following is the incorrect form of Raoult's law?

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Alpha Question Bank for Medical: Chemistry>Chapter 8 - Solutions>Exercise 1>Q 63

The vapour pressure of a dilute aqueous solution of Glucose is

750 mm

of mercury at

373 K .

The mole fraction of solute is -