Chemistry Lesson Plan in Hindi

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Chemistry Lesson Plan Objective in Hindi for Students

A non-ideal solution is prepared by mixing 30 ml chloroform and 50 ml acetone. The volume of the mixture will be

(A) > 80 ml

(B) < 80 ml

(C) = 80 ml

(D) ≥ 80 ml

Option b -

The vapour pressure is least for

(A) Pure water

(B) 0.1 m aq. urea solution

(C) 0.2 m aq. urea solution

(D) 0.3 m aq. urea solution

Option d - 0.3 m aq. urea solution

18 g of glucose dissolved in 178.28 g of water. The vapour pressure of water for this aqueous solution at 100°℃ is

(A) 759 torr

(B) 7.60 torr

(C) 76 torr

(D) 752.40 torr

Option d - 752.40 torr

The relative lowering in vapour pressure of solution produced by dissolving 71.5 g of substance in 100 g of water is 0.00713. The molar mass of the solute is

(A) 18.0

(B) 342

(C) 60

(D) 180

Option d - 180

Colligative properties are used for the determination of

(A) Molar mass

(B) Equivalent mass

(C) Melting and boiling point

(D) Structure of the molecule

Option a - Molar mass

The vapour of a solution containing 2 moles of a solute in 2 moles of water. (Vapour pressure of water = 24 mm Hg)

(A) 24 mm Hg

(B) 32 mm Hg

(C) 48 mm Hg

(D) 12 mm Hg

Option d - 12 mm Hg

An aqueous solution of glucose was prepared by dissolving 18 g of glucose in 90 g of water. Relative lowering in vapour pressure is

(A) 0.02

(B) 1.1

(C) 20

(D) 1.96

Option a - 0.02

The colligative property of a solution is

(A) Vapour pressure

(B) Boiling point

(C) Osmotic pressure

(D) Freezing point

Option c - Osmotic pressure

18 g of a non-volatile solute dissolved in 900 g of water such that the relative lowering in vapour pressure was 0.002. The molar mass of the solute is

(A) 60

(B) 342

(C) 18

(D) 180

Option d - 180

The vapour pressure of pure water at 30°C is 31.8 mm. The vapour pressure of a solution containing 90 g glucose in 900 g of water at the same! temperature is

(A) 30.24 mm

(B) 31.482 mm

(C) 32.46 mm

(D) 30.74 mm

Option b - 31.482 mm

Benzene and toluene form nearly ideal solutions. At 25°C, the vapour pressure of benzene is 75 torr and toluene is 22 torr. The partial vapour pressure of benzene at the same temperature for a solution containing 78 g benzene and 46 g toluene in torr is

(A) 50

(B) 25

(C) 37.5

(D) 53.5

Option a - 50

The vapour pressure lowering is caused by the addition of 100 g of sucrose to 1000 g of water. If the vapour pressure of pure water at 25°C is 28.8 mm Hg.

(A) 1.25 mm Hg

(B) 0.125 mm Hg

(C) 1.15 mm Hg

(D) 0.12 mm Hg

Option b - 0.125 mm Hg

When a liquid is heated its vapour pressure

(A) Increases

(B) Decreases

(C) Increases and becomes constant at the boiling point of the liquid

(D) Unpredictable

Option c - Increases and becomes constant at the boiling point of the liquid

We covered all the chemistry lesson plan in Hindi above in this post for free so that you can practice well for the exam.

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