ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 9

HARD

12th ICSE

IMPORTANT

Earn 100

The osmotic pressure of $0.01$ molar solution of an electrolyte is found to be $0.65 atm .$ at $27 ° C$ . Calculate the van’t Hoff factor. What conclusion can you draw about the molecular state of the solute in the solution?

Important Questions on Solutions

HARD

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 10

A solution X is prepared by dissolving three moles of glucose in one litre of water and a solution Y is prepared by dissolving

1.5

moles of sodium chloride in one litre of water. Will the osmotic pressure of X be higher, lower or equal to that of Y? Give a reason for your answer.

HARD

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 11

A solution of urea in water has a boiling point of

100.18 ° C

. Calculate the freezing point of the solution. (K_f for water is

1.86 K \cdot Kg \cdot {mol}^{- 1}

and K_b for water is

0.512 K \cdot Kg \cdot {mol}^{- 1}

).

HARD

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 11

A solution of lactose, containing

8.45 g

of lactose in

100 g

of water has a vapour pressure of

4.559 mm

of

Hg

at

0 ° C

. If the vapour pressure of pure water is

4.579 mm

of

Hg

, calculate the molecular weight of lactose.

HARD

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 12

Among equimolal solutions of

{MgCl}_{2}

,

NaCl

,

{FeCl}_{3}

and

C_{12} H_{22} O_{11}

, which will show minimum osmotic pressure? Why?

HARD

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 13

A certain aqueous solution boils at

100.303 ° C

. What is its freezing point? K_b for water

= 0.5 K \cdot Kg \cdot {mol}^{- 1}

and K_f

= 1.87 K \cdot Kg \cdot {mol}^{- 1}

?

HARD

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 13

A solution containing

1 g

of sodium chloride in

100 g

of water freezes at

- 0.604 ° C

. Calculate the degree of dissociation of sodium chloride. (

Na = 23, Cl = 35.5

, K_f for water

1.87 K \cdot Kg \cdot {mol}^{- 1}

)

MEDIUM

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 14

Of the following terms used for denoting concentration of a solution, the one which does not get affected by temperature is

HARD

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 15

Define Raoult’s law for the elevation of boiling point of a solution.