Bureau's Higher Secondary Chemistry Volume-2>Chapter 2 - Solutions>QUESTIONS>Q 5

MEDIUM

12th Odisha Board

IMPORTANT

Earn 100

Vapour pressure of water is $12.3 kPa$ at $300 K$ . Calculate vapour pressure of $1$ molal solution of a non-volatile solute in it.

Important Questions on Solutions

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 2 - Solutions>QUESTIONS>Q 6

A solution of sucrose is prepared by dissolving

68.4 g

in

1000 g

of water. Calculate the vapour pressure of solution at

20 ° C

. The vapour pressure of water of

293 K

is

0.023 atm

. Assume that the solution behaves ideally. (Molar mass of sucrose

= 342 g {mol}^{- 1}

).

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 2 - Solutions>QUESTIONS>Q 7

A solution containing $18 g$ of non-volatile solute in $200 g$ of water freezes at $272.07 K$ . Calculate the molecular mass of the solute in $g / mol$ (Water freezes at $273 K$ and its $K_{f} = 1.86 K kg {mol}^{- 1}$ ).

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 2 - Solutions>QUESTIONS>Q 8

The boiling point of a solution containing

5.0 g

of non-volatile solute in

1 kg

of a solvent at

0.05 °

higher than that of pure solvent. Calculate the molecular mass of the solute (Molecular mass and

K_{b}

for a solvent are

78

and

2.53 K kg / mol

respectively).

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 2 - Solutions>QUESTIONS>Q 9

A $5 %$ solution of ${CaCl}_{2}$ at $0 ° C$ developed an osmotic pressure of $15$ atmosphere. Calculate the degree of dissociation.

EASY

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 2 - Solutions>QUESTIONS>Q 10

5.85 g

of

NaCl

is dissolved in

90 g

water. What is the mole fraction of

NaCl

?

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 2 - Solutions>QUESTIONS>Q 11

A solution of $2.4 g$ of a substance in $25 g$ water boiled at $100.8 ° C$ at $1 atm$ pressure. Calculate the molecular mass of the substance (in $g / mol$ ). (Boiling elevation constant for water $= 0.52 ° C$ per $1000 g$ of it).

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 2 - Solutions>QUESTIONS>Q 12

19.5 g

of

{CH}_{2} FCOOH

is dissolved in

500 g

of water. The depression in the freezing point of water observed is

1 . 0^{°} C

. Calculate the Van't Hoff factor and dissociation constant of

{CH}_{2} FCOOH

. (

K_{f} = 1.86 K kg {mol}^{- 1}

)

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 2 - Solutions>QUESTIONS>Q 1

Describe the kinetic molecular theory of liquids.