Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 1>Q 89

EASY

JEE Main

IMPORTANT

Earn 100

How many grams of glucose, $C_{6} H_{12} O_{6}$ , should be dissolved in $0.5 kg$ of water at $25 ° C$ to reduce the vapour pressure of water by $1 %$ ?

50% studentsanswered this correctly

Important Questions on Solutions

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 1>Q 90

Determine the elevation in boiling point of a solution of

13.44 g

of

{CuCl}_{2}

in

1 kg

of water using the following information (Molecular weight of

{CuCl}_{2} = 134.4

and

K_{b} = 0.52 K {molal}^{- 1}

).

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 2>Q 1

The addition of

0.643 g

of a compound to

50 ml

of benzene (density

= 0.879 g {mol}^{- 1}

) lowers the freezing point from

5.51 ° C

to

5.03 ° C

. If the freezing point constant,

K_{f}

, for benzene is

5.12 K kg {mol}^{- 1}

, the molar mass of the compound is approximately:

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 2>Q 2

A solution containing

8.0 g

of nicotine in

92 g

of water freezes

0.925

degrees below the normal freezing point of water. If the molal freezing point depression constant,

K_{f} = 1.85 ° C {mol}^{- 1}

, then the molar mass of nicotine is:

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 2>Q 3

Which solution will have the highest boiling point?

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 2>Q 4

Which one of the following statements is false?

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 2>Q 5

2.56 g

of sulphur in

100 g

of

{CS}_{2}

has depression in freezing point

0.010 ° C, K_{f} = 0.1 ° C {molal}^{- 1} .

Hence, atomicity of sulphur in

{CS}_{2}

is

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 2>Q 6

If vapour pressures of pure liquids '

A

' and '

B

' are

300

and

800 torr

respectively at

25 ° C

. When these two liquids are mixed at this temperature to form a solution in which mole percentage of '

B

' is

92

, then the total vapour pressure is observed to be

0.95 atm

. Which of the following is true for this solution?

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 22 - Solutions>Level 2>Q 7

In what ratio of volumes $0.4 M HCl$ and $0.9 M HCl$ are to be mixed such that the concentration of the resultant solution becomes $0.7 M$ ?