Class 10 Science MCQ Questions of Chemical Reactions and Equations

Check the underneath MCQ Questions of Chemical Reactions and Equations with Answer, MCQ Questions for Class 10 Science with Answer were prepared based on the most recent exam pattern. We have Provided MCQ Questions of Chemical Reactions and Equations to assist students with understanding the idea well overall. Students can tackle Class 10 Science Chemical Reactions and Equations Multiple Choice Questions with Answer to realize their preparation level.

Solving MCQ Questions for Class 10 to overhaul the ideas in the syllabus successfully and improve your odds of getting good grades in your board exams. All these questions depend on significant topics and concepts from the section. Answer to all questions is additionally given here.

1. The reaction between lead nitrate and potassium iodide present in aqueous solutions is an example of

(a) Decomposition Reaction
(b) Displacement Reaction
(c) Double Displacement Reaction
(d) Neutralisation Reaction

Answer:

2. Fatty foods become rancid due to the process of

(a) oxidation

(b) corrosion

(d) hydrogenation

Answer:

(a) oxidation

3. Assertion: A lead nitrate on thermal decomposition gives lead oxide, brown coloured nitrogen dioxide and oxygen gas.

Reason: Lead nitrate reacts with potassium iodide to form yellow ppt of lead iodide and the reaction is double displacement as well as precipitation reaction.

(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
(e) Both A and R are false.

Answer:

(b) Both A and R are true but R is not the correct explanation of A.

4. Silver article turns black when kept in the open for a few days due to formation of
(a) $H_{2} S$
(b) $A g S$
(c) $A g S O_{4}$
(d) $A g_{2} S$

Answer:

(d) $A g_{2} S$

5. Reaction of ‘magnesium’ with air is

(A) Exothermic reaction
(B) Endothermic reaction
(C) Reversible reaction
(D) Substitution reaction

Answer:

A) Exothermic reaction

6. What type of chemical reactions take place when electricity is passed through water?

(a) Displacement
(b) Combination
(c) Decomposition
(d) Double displacement

Answer:

7. In an electrolytic cell where electrolysis is carried, anode has:
(a) Positive change
(b) Negative charge
(c) Connected to negative terminal of the battery
(d) None of these is correct

Answer:

(a) Positive change

8. On immersing an iron nail in $C u S O_{4}$ solution for few minutes, you will observe
(a) no reaction takes place
(b) the colour of solution fades away
(c) the surface of iron nails acquire a black coating
(d) the colour of solution changes to green

Answer:

(d) the colour of solution changes to green

9. Which of the given gases can be used for storage of fresh samples of an oil for a long time?

(A) Carbon dioxide or oxygen
(B) Nitrogen or helium
(C) Helium or oxygen
(D) Nitrogen or oxygen

Answer:

B) Nitrogen or helium

10. Rancidity can be prevented by

(a) adding antioxidants
(b) storing food away from light
(c) keeping food in refrigerator
(d) all of these

Answer:

(d) all of these

11. In which of the following, heat energy will be evolved?

(a) Electrolysis of water
(b) Dissolution of $N H_{4} C l$ in water
(c) Burning of L.P.G.
(d) Decomposition of AgBr in the presence of sunlight

Answer:

12. What is the other name for quick lime?

(A) Calcium hydroxide
(B) Calcium oxide
(C) Carbon dioxide
(D) Sodium oxide

Answer:

B) Calcium oxide

13. Both $C O_{2}$ and $H_{2}$ gases are

(A) Heavier than air
(B) Colourless
(C) Acidic in nature
(D) Soluble in water

Answer:

B) Colourless

14. Which of the following are exothermic processes?

(i) Reaction of water with quick lime
(ii) Dilution of an acid
(iii) Evaporation of water
(iv) Sublimation of camphor (crystals)

(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (iii) and (iv)

Answer:

(a) (i) and (ii)

15. The reaction of acetylene and hydrogen in presence of heated nickel powder is called :

(a) Substitution
(b) Dissociation
(c) Addition
(d) Decomposition.

Answer:

16. Which of the following is not a physical change?

(a) Boiling of water to give water vapour
(b) Melting of ice to give water
(c) Dissolution of salt in water
(d) Combustion of Liquefied Petroleum Gas (LPG)

Answer:

(d) Combustion of Liquefied Petroleum Gas (LPG)

17. What happens when dilute Sulphuric acid is added to Zn granules?

(a) Hydrogen gas and Zinc chloride are produced.
(b) Chlorine gas and Zinc hydroxide are produced.
(c) No reaction takes place.
(d) Zinc salt and water are produced.

Answer:

(a) Hydrogen gas and Zinc chloride are produced.

18. A teacher gave two test tubes to the students, one containing water and the other containing sodium hydroxide. She asked them to identify the test tube containing sodium hydroxide solution. Which one of the following can be used for the identification?

(a) Blue litmus
(b) Red litmus
(c) Sodium carbonate solution
(d) Dilute hydrochloric acid

Answer:

(b) Red litmus

19. The substitution is characteristic of:

(a) Alkenes
(b) Alkynes
(c) Carbon monoxide
(d) Paraffins.

Answer:

(d) Paraffins.

20. What type of reaction is respiration

(a) Exothermic
(b) Endothermic
(c) Reduction reaction
(d) Combination reaction

Answer:

(a) Exothermic