Punjab 10th Class Chemistry Chapter 2 Acid, Base and Salts10th Class Punjab Boards

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Question 1 of 10

Chemistry

1. In the following reaction which species is donating an electron pair?
NH₃ + BF₃ ➝ H₃N – BF₃

1.H

2.BF₃

3.N

4.B

Question 1 of 10

Question 2 of 10

2. Ammonia is a base, because it

1.Contains OH group

2.Ionizes in water to give OH ions

3.Can accept an election pair

4.Can accept proton

Question 2 of 10

Question 3 of 10

3. Choose Lewis acid

1.H₂O

2.CN

3.NH₃

4.H⁺

Question 3 of 10

Question 4 of 10

4. Which of the following is a Lewis base?

1.BF₃

2.HCl

3.AlCl₃

4.F⁻

Question 4 of 10

Question 5 of 10

5. Milk of magnesia contains Mg(OH)₂. It is used as antacid. It is used as antacid. It neutralizes excess stomach acid. Which salt is formed in this reaction?

1.MgCO₃

2.MgCl₂

3.MgO

4.MgSO₄

Question 5 of 10

Question 6 of 10

6. An aqueous solution of NaOH is used as a drain cleaner. If the concentration of 0H⁻ ions in this solution is 1.0 x 10⁻⁵ M, the concentration of H⁺ ions in it would be?

1.1.0 x 10⁻⁵ M

2.1.0 x 10⁻⁹ M

3.1.0 x 10⁻¹⁴ M

4.1.0 x 10⁻⁷ M

Question 6 of 10

Question 7 of 10

7. Which of the following cannot be classified as Arrhenius acid?

1.H₂CO₃

2.HNO₃

3.CO₂

4.H₂SO₄

Question 7 of 10

Question 8 of 10

8. A drain cleaner solution contains 1.0 x 10⁻⁸ M, OH concentration. This Solution is

1.Acidic

2.Neutral

3.Basic

4.Cannot be predicted

Question 8 of 10

Question 9 of 10

9. Consider the following reaction?
H₂O + HCl ⇌ H₃O⁺ + Cl⁻
Which species is an electron pair accept-or in this reaction?

1.H₃O⁺

2.None

3.H₂O

4.HCl

Question 9 of 10

Question 10 of 10

10. NH₃ cannot be classified as a base by:

1.All of these theories

2.Arrhenius theory

3.Lewis theory

4.Bronsted –Lowry theory

Question 10 of 10

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