Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 38

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Two liquids $X$ and $Y$ are perfectly immiscible. If $X$ and $Y$ have molecular masses in ratio $1 : 2,$ the total vapour pressure of a mixture of $X$ and $Y$ prepared in weight ratio $2 : 3$ should be $({Px}^{0} = 400$ $torr$ , $P_{y}^{0} = 200$ $torr$ ):

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 39

Which is/are true about ideal solutions?

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 40

At

40 ° C

, vapour pressure in torr of methanol and ethanol solution is

P = 119 x + 135

where

x

is the mole fraction of methanol. Hence,

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 42

At

35 ° C

, the vapour pressure of

{CS}_{2} is 512 mm Hg

, and of acetone is

344 mm Hg

. A solution of

{CS}_{2}

and acetone in which the mole fraction of

{CS}_{2} is 0.25

, has a total vapour pressure of

600 mm Hg

. Which of the following statements is/are correct?

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 44

In which of the following pairs of solutions will the values of the Vant Hoff factor be the same?

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 45

2 g

of non-volatile hydrocarbon solute dissolved in

100 g

of hypothetical organic solvent

(molar mass = 50)

was found to lower vapour pressure from

75.50 to 75 mm of Hg at 20 ° C

. Given that hydrocarbon contains

96 % of C .

Then which of the following are true?

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 46

In the depression of freezing point experiment, it is found that the

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 48

Which facts are true when we use Van't Hoff equation

PV = nST

for osmotic pressure

P

of dilute solution?

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-3>Q 1

A compound

H_{2} X

with molar weight of

80 g

is dissolved in a solvent having density of

0.4 g {mL}^{- 1}

. Assuming no change in volume upon dissolution, the molality of a

3.2

molar solution is