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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$0.1 mole {XY}_{2}$ is dissolved in $2 L$ water, where it ionizes to give $X^{2 +} and Y_{2}^{2 -}$ . Observed osmotic pressure is $3 atm$ . Molar mass of $X$ is $24$ and $Y$ is $32$ . Find $M_{observed} + 2 i$ (where $M_{observed}$ is observed molar mass of ${XY}_{2}$ ) (Use $R = 1 / 12 L$ - ${atm}^{- 1} {mol}^{- 1}$ $K$ and temperature is $87 ° C$ ).

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 30

1 g

of a monobasic acid dissolved in

200 g

of water lowers the freezing point by

0.186 º C

. On the other hand, when

1 g

of the same acid is dissolved in water to make the solution

200 mL

, this solution requires

125 mL of 0.1 M NaOH

for complete neutralization. Calculate

%

dissociation of acid.

(K = 1.86 \frac{K - kg}{mol})

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-2>Q 37

Select correct statements :

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

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 40

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

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-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

0.1 mole XY2 is dissolved in 2 L water, where it ionizes to give X2+ and Y2 2–. Observed osmotic pressure is 3 atm. Molar mass of X is 24 and Y is 32. Find Mobserved + 2i (where Mobserved is observed molar mass of XY2) (Use R = 1/12 L-atm-1mol-1 K and temperature is 87°C).

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