Solutions Quiz 6 – Punjab Meritorious School Preparation Portal

Welcome to your 6th Aug Solutions Quiz 6 CBT TEST

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The freezing point of a 3 % aq. solution of A is equal to the freezing point of 9 % aq. solution of B. If the molecular weight of ‘A’ is 60, then the molecular wt. of B is

180

360

1.00 g of a non-electrolyte solute (molar mass 250 g mol^–1) was dissolved in 51.2 g of benzene. If the freezing point depression constant, K_f of benzene is 5.12 K kg mol^–1, the freezing point of benzene will be lowered by

0.3 K

0.5 K

0.4 K

0.2 K

Which one of the following aqueous solutions will exhibit highest boiling point ?

The normality of mixture obtained by mixing 100 ml of 0.4 N H₂SO₄ and 200 ml of 0.2 M HCl is

0.0267

0.2670

1.0267

1.1670

The molecular weight of benzoic acid in benzene as determined by depression in freezing point method corresponds to:

ionization of benzoic acid

dimerization of benzoic acid

trimerization of benzoic acid.

solvation of benzoic acid.

The amount of dibasic acid present in 100 ml of the aq. solution to give solution of [mol. wt. = 200] normality of 0.1 N is

0.5 g

1 g

1.5 g

2 g

Brownian movement is found in

unsaturated solution

saturated solution

colloidal solution

suspension solution

The elevation in boiling point of a solution of 13.44 g of CuCl₂ in 1 kg of water using the following information will be (Molecular weight of CuCl₂

= 134.4 g and K_b = 0.52 K kg mol^-1)

0.16

0.05

0.1

0.2

In a 0.2 molal aqueous solution of a weak acid HX the degree of ionization is 0.3. Taking kf for water as 1.85, the freezing point of the solution will be nearest to

– 0.360 ºC

– 0.260 ºC

+ 0.481 ºC

– 0.481 ºC

A solution is formed by diluting 250 ml. of 0.400 N H₂SO₄ with one litre of water. The normality of above formed solution is

0.400 N

0.899 N

0.040 N

0.080 N

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