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

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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

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-3>Q 2

Which concentration term is affected by change in temperature?

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

5.2

molal aqueous solution of methyl alcohol

{CH}_{3} OH

is supplied. What is the mole fraction of methyl alcohol in the solution?

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-3>Q 4

The molarity of a solution obtained by mixing

750 mL

of

0.5 (M) HCl

,

250 mL

of

2 (M) HCl

will be:

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-3>Q 5

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

$I .$ The vapour pressure of the solution is less than that of pure solvent.

$II .$ The vapour pressure of the solution is more than that of pure solvent.

$III .$ Only solute molecules solidify at the freezing point.

$IV .$ Only solvent molecules solidify at the freezing point.

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-3>Q 6

The Van't Hoff factor for

0.1 M Ba {({NO}_{3})}_{2}

solution is

2.74 .

The degree of dissociation is

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Alpha Question Bank for Engineering: Chemistry>Chapter 8 - Solutions>Exercise-3>Q 7

In the

500 {cm}^{3}

of the water,

3.0 \times 10^{- 3} kg

of acetic acid is added. If

23 %

of acetic acid is dissociated, what will be the depression in freezing point?

K_{f}

and density of water are

1.86 K {kgmole}^{- 1} and 0.997 g {cm}^{- 3}

respectively

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

A 0.004 M

solution of

{Na}_{2} {SO}_{4}

is isotonic with

0.010 M

solution of glucose at same temperature. The apparent percentage dissociation of

{Na}_{2} {SO}_{4}

is