Mole Concept Quiz 5 – Punjab Meritorious School Preparation Portal

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To neutralise completely 20 mL of 0.1 M aqueous solution of phosphorous acid (H₃PO₃), the value of 0.1 M aqueous KOH solution required is

40 mL

20 mL

10 mL

60 mL

25 mL of a solution of barium hydroxide on titration with a 0.1 molar solution of hydrochloric acid gave a litre value of 35 mL. The molarity of barium hydroxide solution was

0.14

0.28

0.35

0.07

With increase of temperature, which of these changes?

Molality

Weight fraction of solute

Molarity

Mole fraction

0.4 moles of HCl and 0.2 moles of CaCl₂ were dissolved in water to have 500 mL of solution, the molarity of Cl^– ion is:

0.8 M

1.6 M

1.2 M

10.0 M

What is the molarity of 0.2 N Na₂CO₃ solution?

0.1 M

1.0 M

0.4 M

0.2 M

6.02 × 10²⁰ molecules of urea are present in 100 ml of its solution. The concentration of urea solution is

(Avogadro constant, N_A = 6.02 × 10²³ mol^–1)

0.02 M (b) (c) (d)

0.01 M

0.001 M

0.1 M

Density of a 2.05 M solution of acetic acid in water is 1.02 g/mL. The molality of the solution is

Two solutions of a substance (non-electrolyte) are mixed in the following manner. 480 mL of 1.5 M first solution + 520 mL of 1.2 M second solution. What is the molarity of the final mixture?

2.70 M

1.344 M

1.50 M

1.20 M

A metallic chloride contain 47.22 % metal. Calculate the equivalent weight of metal.

39.68

31.76

36.35

33.46

The volume of 20 volume H₂O₂ required to get 5 litres of O₂ at STP is

250 ml

125 ml

100 ml

50 ml

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