You are currently viewing Important MCQ Questions for Class 10 Science Chapter 1 Chemical Reactions and Equations

Important MCQ Questions for Class 10 Science Chapter 1 Chemical Reactions and Equations

If you are preparing for CBSE Class 10 Board Exam Term 1 which will be an objective type questions paper, then you need to practice multiple choice questions of Class 10 Chemistry Chapterwise. In this article of AKVTutorials, you will get Important MCQ Questions for Class 10 Science Chapter 1 Chemical Reactions and Equations with Answer Keys.

MCQ Questions for Class 10 Chemical Reactions and Equations Question No 21: 

Which of the following statement is correct regarding to physical changes?

Option A : In physical change, new substance is formed.

Option B : In physical change, no new substance is formed

Option C : In physical change, chemical composition of substance is changed.

Option D : None of these

Show/Hide Answer

Option B : In physical change, no new substance is formed

MCQ Questions for Class 10 Chemical Reactions and Equations Question No 22: 

Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Calcium hydroxide dissolves in water to form its solution called lime water. Which among the following is (are) true about slaking of lime and the solution formed?
(i) It is an endothermic reaction
(ii) It is an exothermic reaction
(iii) The pH of the resulting solution will be more than seven
(iv) The pH of the resulting solution will be less than seven

Option A : (i) and (ii)

Option B : (ii) and (iii)

Option C : (i) and (iv)

Option D : (iii) and (iv) 

Show/Hide Answer

Option B : (ii) and (iii)

MCQ Questions for Class 10 Chemical Reactions and Equations Question No 23: 

Which among the following statement(s) is (are) true? Exposure of silver chloride to sunlight for a long duration turns grey due to
(i) the formation of silver by decomposition of silver chloride
(ii) sublimation of silver chloride
(iii decomposition of chlorine gas from silver chloride
(iv) oxidation of silver chloride

Option A : (i) only

Option B : (i) and (iii)

Option C : (ii) and (iii)

Option D : (iv) only

Show/Hide Answer

Option A : (i) only

MCQ Questions for Class 10 Chemical Reactions and Equations Question No 24: 

FeS + H2SO4 ⟶ FeSO4 + H2S 🠁
In the above equation 🠁 indicates:

Option A : gas evolved

Option B : insoluble substance formed

Option C : reactive element

Option D : element is not useful in chemical equation

Show/Hide Answer

Option A : gas evolved

MCQ Questions for Class 10 Chemical Reactions and Equations Question No 25: 

Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved?

(i) Displacement reaction
(ii) Precipitation reaction
(iii) Combination reaction
(iv) Double displacement reaction

Option A : (i) only

Option B : (ii) only

Option C : (iv) only

Option D : (ii) and (iv)

Show/Hide Answer

Option C : (iv) only

MCQ Questions for Class 10 Chemical Reactions and Equations Question No 26: 

A substance ‘X’ is used in white-washing and is obtained by heating limestone in the absence of air. Identify ‘X’.

Option A : CaOCl2

Option B : Ca (OH)2

Option C : CaO

Option D : CaCO3

Show/Hide Answer

Option A : CaOCl2

MCQ Questions for Class 10 Chemical Reactions and Equations Question No 27: 

CaO(s) + H2O (l)  ⟶ X(s) +  Heat + Hissing Sound

Here X is:

Option A : Cu(OH)

Option B : Cu(OH)2

Option C : 2CaOH

Option D : Ca2OH

Show/Hide Answer

Option B : Cu(OH)2

MCQ Questions for Class 10 Chemical Reactions and Equations Question No 28: 

Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is

Option A : 1:1

Option B : 2:1

Option C : 4:1

Option D : 1:2

Show/Hide Answer

Option B : 2:1

MCQ Questions for Class 10 Chemical Reactions and Equations Question No 29: 

When Ag is exposed to air it gets a black coating of

Option A : AgNO3

Option B : Ag2S

Option C : Ag2O

Option D : Ag2CO3

Show/Hide Answer

Option B : Ag2S

MCQ Questions for Class 10 Chemical Reactions and Equations Question No 30: 

The balancing of chemical equation is based on:

Option A : Law of conservation of energy

Option B : Law of conservation of mass

Option C : Law of conservation of heat

Option D : None of these

Show/Hide Answer

Option A : Law of conservation of mass

CBSE Class 10 Science Chapterwise MCQ
1 : Chemical Reactions & Equations MCQs
| 1 to 10 | 11 to 20
2 : Acids, Bases & Salts MCQs
| 1 to 10 | 11 to 20
3 : Metals & Non-Metals MCQs
| 1 to 10 | 11 to 20
4 : Carbon & Its Compound MCQs
| 1 to 10 | 11 to 20
5 : Periodic Classification of Elements MCQs
| 1 to 10 | 11 to 20
6 : Life Process MCQs
| 1 to 10 | 11 to 20
7 : Control & Coordination MCQs
| 1 to 10 | 11 to 20
8 : How Do Organism Reproduce MCQs
| 1 to 10 | 11 to 20
9 : Heredity & Evolution MCQs
| 1 to 10 | 11 to 20
10 : Light Reflection & Refraction MCQs
| 1 to 10 | 11 to 20
11 : Human Eye & Colorful World MCQs
| 1 to 10 | 11 to 20
12 : Electricity MCQs
| 1 to 10 | 11 to 20
13 : Magnetic Effect of Electric Current MCQs
| 1 to 10 | 11 to 20
14 : Source of Energy MCQs
| 1 to 10 | 11 to 20
15 : Our Environment MCQs
| 1 to 10 | 11 to 20
16 : Management of Natural Resources MCQs
| 1 to 10 | 11 to 20

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