Chemistry Chemical Equilibrium Online Quiz Test MCQs

Chemical Equilibrium is the state in which both reactants and products are present in concentrations that have no further tendency of changing over time. As this is a quite important topic, so given below is a free online quiz about it which will help you in checking and also improving your knowledge related to chemical equilibrium.

Chemistry Chemical Equilibrium Online Quiz Test MCQs

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Chemistry

1. The rate of reaction:

Increases as reaction proceeds

Remains same as reaction proceeds

May decrease or increase as reaction proceeds

Decrease as reaction proceeds

Question 1 of 15

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2. Human blood has a pH of:

6.35

9.35

7.35

8.35

Question 2 of 15

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3. A basic buffer solution can be prepared by mixing:

Weak acid and its salt with strong base.

Strong acid and its salt with weak base.

Strong base and its salt with weak acid.

Weak base and its salt with strong acid.

Question 3 of 15

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4. The pH value of 0.001M HCl solution is water is:

>7

<7

Exactly 7

Nearly 7

Question 4 of 15

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5. A reaction is reversible because:

Products are stable

Products are reactive

Reactants are stable

Reactants are reactive

Question 5 of 15

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6. Conjugate base of a very weak acid is:

Relatively very weak base

Relatively very strong base

Relatively strong base

Relatively weak base

Question 6 of 15

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7. pH of pure water is:

9

0

7

14

Question 7 of 15

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8. The pH of 0.001M NaOH aqueous solution is:

13

8

9

11

Question 8 of 15

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9. The process in which ionization of an electrolyte is suppressed by the addition of another strong electrolyte containing one same ion is called:

Common ion effect

Pyrolysis

Hydrolysis

Electrolysis

Question 9 of 15

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10. Acids and bases when dissolved in water:

May or may not be completely dissociated

May not be completely dissociated

May be completely dissociated

None of above

Question 10 of 15

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11. Buffer capacity is maximum when both components have:

Equal concentration

High and equal concentration

Low concentration

High concentration

Question 11 of 15

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12. A chemical reaction A →B is said to be in equilibrium when:

Rate of transformation of A to B is equal to B to A.

50% reactant has been changed to B.

Complete conversion of A to B has taken place

Conversion of A to B is 50% complete.

Question 12 of 15

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13. What happens when a reaction is at equilibrium and more reactant is added:

Backward reaction rate is increased

Forward reaction rate is increased

Equilibrium remains unchanged

Forward reaction rate is decreased

Question 13 of 15

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14. The sum of pH and pOH is:

14

10

7

18

Question 14 of 15

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15. The rate of a chemical reaction is directly proportional to product of molar concentration of reacting substance. It is called:

Rate law

Law of conservation of energy

Active mass rule

Law of mass action

Question 15 of 15

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