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 |