Mole Concept Quiz 9 – Punjab Meritorious School Preparation Portal

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Question is mentioned below :

1.45

1.64

1.88

1.22

Two solutions of a substance (non-electrolyte) are mixed in the following manner. 480 mL of 1.5 M of 1 solution with 520 mL of 1.2 M of II solution. The molarity of final solution is:

1.20 M

1.50 M

1.344 M

2.70 M

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

60 mL

20 mL

40 mL

10 mL

Which has maximum number of atoms?

24 g of C (12)

56 g of Fe (56)

27 g of Al (27)

108 g of Ag (108)

H₃BO₃ is:

monobasic and weak Lewis acid

monobasic and weak Bronsted acid

monobasic and strong Lewis acid

tribasic and weak Bronsted acid

6.02 × 10²⁰ molecules of urea are present in 100 mL of its solution. The molarity of urea solution is:

0.1

0.01

0.02

0.001

How many moles of magnesium phosphate, Mg₃ (PO₄)₂ will contain 0.25 mole of oxygen atoms?

If 1/6 in place of 1/12 mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will:

decrease twice

increase two folds

remains unchanged

be a function of the molecular mass of element

25 ml of a solution of barium hydroxide on titration with 0.1 M solution of HCI gave a titre value of 35 mL. The molarity of Ba(OH)₂ is:

0.28 (b) (c) (d)

0.35

0.07

0.14

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

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