HARD

JEE Main

IMPORTANT

Earn 100

When $800 mL$ of $0.5 M$ nitric acid is heated in a beaker, its volume is reduced to half and $11.5 g$ of nitric acid is evaporated. The molarity of the remaining nitric acid solution is $x \times 10^{- 2} M$ . (Molar mass of nitric acid is $63 g {mol}^{- 1}$ )

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Important Questions on Solutions

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 8 - Solutions>JEE Main - 26 July 2022 Shift 2>Q 96

The elevation in boiling point for

1

molal solution of non-volatile solute

A

3 K

. The depression in freezing point for

2

molal solution of

A

in the same solvent is

6 K

. The ratio of

K_{b}

and

K_{f}

i.e.,

K_{b} / K_{f}

1 : X

. The value of

X

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 8 - Solutions>JEE Main - 27 July 2022 Shift 1>Q 97

Boiling point of a

2 %

aqueous solution of a nonvolatile solute

A

is equal to the boiling point of

8 %

aqueous solution of a non-volatile solute

B

. The relation between molecular weights of

A

and

B

is.

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 8 - Solutions>JEE Main - 27 July 2022 Shift 2>Q 98

When a certain amount of solid

A

is dissolved in

100 g

of water at

25 ° C

to make a dilute solution, the vapour pressure of the solution is reduced to one-half of that of pure water. The vapour pressure of pure water is

23.76 mmHg

. The number of moles of solute

A

added is

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 8 - Solutions>JEE Main - 28 July 2022 Shift 1>Q 99

150 g

of acetic acid was contaminated with

10.2 g

ascorbic acid

(C_{6} H_{8} O_{6})

to lower down its freezing point by

(x \times 10^{- 1}) ° C

. The value of

x

is____ (Nearest integer). [Given

K_{f} = 3.9 K kg {mol}^{- 1}

; Molar mass of ascorbic acid

= 176 g {mol}^{- 1}

]

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 8 - Solutions>JEE Main - 28 July 2022 Shift 2>Q 100

A gaseous mixture of two substances

A

and

B

, under a total pressure of

0.8 atm

is in equilibrium with an ideal liquid solution. The mole fraction of substance

A

0.5

in the vapour phase and

0.2

in the liquid phase. The vapour pressure of pure liquid

A

is____atm.(Nearest integer)

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 8 - Solutions>JEE Main - 29 July 2022 Shift 1>Q 101

O_{2}

gas is bubbled through water at

303 K

, the number of millimoles of

O_{2}

gas that dissolve in

1

litre of water is____(Nearest integer) (Given : Henry's Law constant for

O_{2}

303 K

46.82 k

bar and partial pressure of

O_{2} = 0.920

bar)
(Assume solubility of

O_{2}

in water is too small, nearly negligible)

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 8 - Solutions>JEE Main - 29 July 2022 Shift 2>Q 102

1.80 g

of solute A was dissolved in

62.5 {cm}^{3}

of ethanol and freezing point of the solution was found to be

155.1 K

. The molar mass of solute

A

{gmol}^{- 1}

. [Given: Freezing point of ethanol is

156.0 K

. Density of ethanol is

0.80 g {cm}^{- 3}

. Freezing point depression constant of ethanol is

2.00 K kg {mol}^{- 1}

]

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 8 - Solutions>JEE Main - 24 January 2023 Shift 1>Q 103

In the depression of freezing point experiment
A. Vapour pressure of the solution is less than that of pure solvent
B. Vapour pressure of the solution is more than that of pure solvent
C. Only solute molecules solidify at the freezing point
D. Only solvent molecules solidify at the freezing point

When 800 mL of 0.5M nitric acid is heated in a beaker, its volume is reduced to half and 11.5 g of nitric acid is evaporated. The molarity of the remaining nitric acid solution is x×10-2M. (Molar mass of nitric acid is 63 g mol-1)

Important Questions on Solutions

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When $800 mL$ of $0.5 M$ nitric acid is heated in a beaker, its volume is reduced to half and $11.5 g$ of nitric acid is evaporated. The molarity of the remaining nitric acid solution is $x \times 10^{- 2} M$ . (Molar mass of nitric acid is $63 g {mol}^{- 1}$ )