MCQ Class 10 Science Chapter 1 Chemical Reactions and Equation

MCQ’s For All Chapters – Science Class 10th

1. There will be total 20 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. A magnesium ribbon is burnt in air. A student made the following observations:
i. Magnesium ribbon undergoes oxidation reaction.
ii. Magnesium reacts with air to form magnesium oxide.
iii. Magnesium ribbon undergoes decomposition reaction.

Which of the following statements is correct?

(ii) and (iii)

(i) and (iii)

(i), (ii) and (iii)

(i) and (ii)

Question 1 of 20

2. Reaction between Ammonium chloride and Barium hydroxide is :

Exothermic reaction

Chemical change

Endothermic reaction

None of these

Question 2 of 20

3. Physical changes are accompanied by:

Evolution of hydrogen gas

Change in state

Formation of a new yellow precipitate

Formation of a new compound.

Question 3 of 20

4. In a reaction between zinc and hydrochloric acid, the changes accompanying a reaction are:

Evolution of gas and heat

Evolution of steam

Formation of precipitate

Formation of dazzling white light

Question 4 of 20

5. If reaction between nitrogen and hydrogen to form ammonia is exothermic, then it will be accompanied by:

Change in state

Change in colour

Evolution of heat

Formation of precipitate

Question 5 of 20

6. During an exothermic reaction:

Heat is absorbed.

There is no heat transfer.

Heat can either be absorbed or evolved.

Heat is evolved.

Question 6 of 20

7. The reactions in which precipitate is formed are known as:

Exothermic reactions

Endothermic reactions

Precipitation reactions

Combustion reactions

Question 7 of 20

8. As seen in the figure, two nails are carefully dipped in copper sulphate solution with the help of threads. What will happen when the nails are removed after half an hour?

No change is observed

Nails turn blue in colour

Nails turn green in colour

Nails turn brown in colour

Question 8 of 20

9. An example of a chemical reaction in which heat is evolved is:

Reaction between sodium and water

Reaction between lead nitrate and potassium iodide

Boiling of water

Ammonium chloride and Barium hydroxide

Question 9 of 20

10. An example of reaction in which gas is evolved is:

Reaction between limestone and HCl

Burning of magnesium ribbon in air

Reaction between Calcium oxide and water

Reaction between lead nitrate and potassium iodide

Question 10 of 20

11. Freezing of water is a:

Physical change

Chemical change

Both physical and chemical change

Exothermic reaction

Question 11 of 20

12. An example of reaction in which precipitate is formed is:

Reaction between hydrogen and oxygen

Reaction between lead nitrate and potassium iodide

Reaction between hydrochloric acid and zinc.

Reaction between sodium and water

Question 12 of 20

13. An example of a physical change is:

Burning of coal

Boiling of water

Reaction between lime and water

Burning of magnesium ribbon

Question 13 of 20

14. The preparation of water from hydrogen and oxygen gas is accompanied by:

Evolution of coloured gas

Formation of precipitate

Formation of ashes

Change in state

Question 14 of 20

15. Which of the following feature is common to both physical and chemical change?

Evolution of hydrogen gas

Formation of new precipitate

Evolution of carbon dioxide

Change in state and colour

Question 15 of 20

16. A drop of colourless liquid is poured over blue litmus paper and it turns to red. The colourless liquid is:

sodium chloride solution

pure water

potassium hydroxide solution

dilute hydrochloric acid

Question 16 of 20

17. What happens when dilute sulphuric acid is added to zinc granules? Select the correct option.

Water and zinc sulphate is formed.

No reaction takes place.

Hydrogen and zinc sulphate is formed.

Hydrogen gas and zinc sulphide is formed.

Question 17 of 20

18. Dissolving of quick lime in water is accompanied by:

Formation of precipitate

Evolution of heat

Change in colour

Change in state

Question 18 of 20

19. Select the reaction which is not an exothermic reaction?

Question 19 of 20

20. Setting of cement is an example of:

Physical change

Precipitation reaction

Endothermic reaction

Exothermic reaction

Question 20 of 20

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