Provide Some Important MCQ Questions for Class 10 Science Chemical Reactions and Equations with Answers?

Asked by Mayu | 1 year ago |  419

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Solution :-

Here you have got MCQ Questions for Class 10 Science Chemical Reactions and Equations with Answers. These will help you with getting prepare with the important Questions for these chapters. It helps in the revision of the whole concept clearly and it also gives an idea about what types of questions can be asked in the examination. These MCQ Questions are prepared as per the Latest Exam Pattern and syllabus. Students can solve these Class 10 Science MCQ Questions of Chemical Reactions and Equations with Answers and evaluate their exam preparation level.

Practice the listed 25 MCQ Questions which are given below and score better marks in the exams: -

1. Which of the following does show an oxidation reaction?

(a) Gain of oxygen

(b) Loss of oxygen

(c) Gain of hydrogen

(d) None of the above

 

2. What happens when lead nitrate reacts with potassium iodide?

(a) They will not react

(b) Large amount of hydrogen release

(c) Yellow ppt of lead iodide and potassium nitrate will be produced

(d) Evolution of gas will occur

 

3. Before burning in air, the magnesium ribbon is cleaned by rubbing with a sand paper to:

(a) Make the ribbon surface shinier

(b) Remove the layer of magnesium oxide from the ribbon surface

(c) Remove the layer of magnesium carbonate from the ribbon surface

(d) Remove the moisture from the ribbon surface

 

4. In a chemical reaction between sulphuric acid and barium chloride solution the white precipitates formed are of:

 (a) Hydrochloric acid

 (b) Barium sulphate

 (c) Chlorine

 (d) Sulphur

 

5. The chemical reaction between potassium chloride and silver nitrate is given by the chemical

equation.

AgNO3 + KCl → AgCl + KNO3

What can be inferred from the chemical equation?

(a) silver nitrate and potassium undergo a decomposition reaction to form silver chloride and potassium nitrate

(b) silver nitrate and potassium undergo a displacement reaction to form silver chloride and potassium nitrate

(c) silver nitrate and potassium undergo a combination reaction to form silver chloride and potassium nitrate

(d) silver nitrate and potassium undergo double displacement reaction to form silver chloride and potassium nitrate

 

6. 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

 

7. Fatty foods become rancid due to the process of

(a) oxidation

(b) corrosion

(c) reduction

(d) hydrogenation

 

8. 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.

 

9. Silver article turns black when kept in the open for a few days due to formation of

(a)  H2S

(b)  AgS

(c)  AgSO4

(d)  Ag2S

10. Reaction of ‘magnesium’ with air is

(A) Exothermic reaction

(B) Endothermic reaction

(C) Reversible reaction

(D) Substitution reaction

 

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

(a) Displacement

(b) Combination

(c) Decomposition

(d) Double displacement

 

12. 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

 

13. On immersing an iron nail in CuSO4 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 acquires a black coating

(d) the colour of solution changes to green

 

14. 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

 

15. Rancidity can be prevented by

(a) adding antioxidants

(b) storing food away from light

(c) keeping food in refrigerator

(d) all of these

 

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

(a) Electrolysis of water

(b) Dissolution of NH4Cl in water

(c) Burning of L.P.G.

(d) Decomposition of AgBr in the presence of sunlight

 

17. What is the other name for quick lime?

(a) Calcium hydroxide

(b) Calcium oxide

(c) Carbon dioxide

(d) Sodium oxide

 

18. Both CO2 and H2 gases are

(a) Heavier than air

(b) Colourless

(c) Acidic in nature

(d) Soluble in water

 

19. Which of the following are exothermic processes?

(a) Reaction of water with quick lime

(b) Dilution of an acid

(c) Evaporation of water

(d) Sublimation of camphor (crystals)

 

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

(a) Substitution

(b) Dissociation

(c) Addition

(d) Decomposition.

 

21. 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)

 

22. 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.

 

23. 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

 

24. The substitution is characteristic of:

(a) Alkenes

(b) Alkynes

(c) Carbon monoxide

(d) Paraffins.

 

25. What type of reaction is respiration

(a) Exothermic

(b) Endothermic

(c) Reduction reaction

(d) Combination reaction

 

Answer Key

1. (a) Gain of oxygen

2. (c) Yellow ppt of lead iodide and potassium nitrate will be produced

3. (c) Remove the layer of magnesium carbonate from the ribbon surface

4. (b) Barium sulphate

5. (d) silver nitrate and potassium undergo double displacement reaction to form silver chloride and potassium nitrate

6. (c) Double Displacement Reaction

7. (a) oxidation

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

9. (d) Ag2S

10. (a) Exothermic reaction

11. (c) Decomposition

12. (a) Positive change

13. (d) the colour of solution changes to green

14. (b) Nitrogen or helium

15. (d) all of these

16. (c)  Burning of L.P.G.

17. (b) Calcium oxide

18. (b) Colourless

19. (a) (i) and (ii)

20. (c) Addition

21. (d) Combustion of Liquefied Petroleum Gas (LPG)

22. (a) Hydrogen gas and Zinc chloride are produced.

23. (b) Red litmus

24. (d) Paraffins

25. (a) Exothermic

Answered by Sudhanshu | 1 year ago

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