Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 3>Q 11

MEDIUM

NEET

IMPORTANT

Earn 100

The vapour pressure of pure benzene at $25^{0} C$ is $180 mm Hg$ . The vapour pressure lowering caused by the addition of $25 g$ of a solute (molar mass $= 342$ ) to $250 g$ of benzene is______.

33.33% studentsanswered this correctly

Important Questions on Solutions

MEDIUM

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 3>Q 12

A small amount of a non-volatile solute is dissolved in

64 .5 {cm}^{3}

of acetone(density:

0 .791 g / {cm}^{3}

). The vapour pressure of this solution at room temperature is

260 mm Hg

, while that of acetone is

285 mm Hg

. What is the molality of the solution?

EASY

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 3>Q 14

0.3

Molal aqueous solution of sucrose boils at

100 . 51^{0} C

. The boiling point of

0.7

molal aqueous solution of sucrose will be______.

MEDIUM

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 3>Q 15

A solution contains

0.524 g

of camphor

(molar mass = 152 g {mol}^{- 1})

dissolved in

36.8 g

of ether(boiling point

= 34 . 6^{0} C

). The molal elevation constant of ether is

{1.94 K kg mol}^{-1}

. The boiling point of the solution is______

MEDIUM

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 3>Q 16

0.1 M

solution each of glucose, sodium chloride, sodium sulphate and sodium phosphate are taken; the ratio of depression in freezing point is______

MEDIUM

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 3>Q 17

The depression in freezing point of a

5 %

aqueous solution of a substance '

A

’ is equal to the depression in freezing point of a

3 %

aqueous solution of a substance '

B

’ If the molecular weight of

B

is

72 g {mol}^{- 1}

, then the molecular weight of

A

is______.

MEDIUM

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 3>Q 19

A solution containing

3.56 g

of a polymer in

1

litre of a solvent was found to have an osmotic pressure of

{5.2×10}^{-4}

atmosphere at

300 K

. The molecular mass of the polymer is_____.

{(R=0.082 L atm mol}^{-1} K^{-1})

MEDIUM

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 3>Q 20

A solution of glucose containing

9.2 g L^{- 1}

(molecular weight :

180 g/mol

) is isotonic with

3 %

solution of a non-volatile solute. The molecular weight of the solute will be_____.

MEDIUM

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 3>Q 21

If density of a solvent is greater than

{1 kg dm}^{-3}

, then the molarity

(M)

and molality

(m)

are related as_____.