All In One ISC Chemistry Class 12>Chapter 2 - Solutions>Chapter Practice>Q 55

MEDIUM

12th ICSE

IMPORTANT

Earn 100

Prove that relative lowering in the vapour pressure of a liquid on addition of a non-volatile solute is a colligative property.

Important Questions on Solutions

EASY

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 2 - Solutions>Chapter Practice>Q 56

Calculated the freezing point depression expected for the

0.0711 m

aqueous solution of

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

. If this solution actually freezes at

0.320 ° C

, what would be the value of Van't Hoff factor? (

K_{f}

for water is

1.86 ° C Kg {mol}^{- 1}

)

MEDIUM

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 2 - Solutions>Chapter Practice>Q 57

What mass of

NaCl

must be dissolved in

65.0 g

of water to lower the freezing point of water by

7.50 ° C

? The freezing point depression constant for water is

1.86 ° C Kg {mol}^{- 1}

. Assume Van't Hoff factor of

NaCl

is

1.87

. (Molar mass of

NaCl = 58.5 g {mol}^{- 1}

)

EASY

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 2 - Solutions>Chapter Practice>Q 58

Why does a solution of chloroform and acetone show negative deviation from Raoult's law?

EASY

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 2 - Solutions>Chapter Practice>Q 58

State how the vapour pressure of a solvent is affected, when a non-volatile solute is dissolved in it?

EASY

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 2 - Solutions>Chapter Practice>Q 58

A solution of glucose

(C_{6} H_{12} O_{6})

in water is labeled as

10 %

by weight. What would be the molality of the solution? ( Molar mass of glucose

= 180 g {mol}^{- 1}

)

EASY

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 2 - Solutions>Chapter Practice>Q 59

Two liquids

X

and

Y

boil at

100 ° C

and

120 ° C

respectively. Which of them has a higher vapour pressure at

50 ° C

and why?

EASY

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 2 - Solutions>Chapter Practice>Q 59

Calculate the boiling point of a solution prepared by adding

15.00 g

of

NaCl

to

250 g

water. (

K_{b}

for water

= 0.512 K Kg {mol}^{- 1}

, molar mass of

NaCl = 58.44 g

)

MEDIUM

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 2 - Solutions>Chapter Practice>Q 59

Calculate the lowering of vapour pressure for an aqueous solution of non-electrolyte at

75 ° C

. (

∆ H = 9.720 K cal {mol}^{- 1}, p_{2} = 742.96 torr

)