Class 10 Science Chapter 1 MCQ

Class 10 Science Chapter 1 MCQ (Multiple Choice Questions) of Chemical Reactions and Equations. All the questions are taken from NCERT Textbook, ten years papers, exemplar books, CBSE Sample papers and different popular books for academic session 2020-21.

There are 25 sets of MCQ tests containing total of 125 questions with answers and explanation. We have uploaded all the questions carefully. For any error, please take screen shot and send us for modification.

Class 10 Science Chapter 1 MCQ for 2020-21

Class: 10 Science
Contents:Multiple Choice Questions – MCQ Tests

Class 10 Science Chapter 1 MCQ Tests 2020-21

Class 10 Science Chapter 1 MCQ are given below. There total of 5 questions in each test. You can attend more and more test to evaluate your practice. MCQs are now important for CBSE Exams also. Answers and explanation of each question is given just below the questions. If you have any doubt, please ask in discussion forum.


Which of the following are combination reactions?

[A]. 2KClO3 → 2KCl +3O2, and 4Al +32O → 2Al2O3
[B]. 4Al +32O → 2Al2O3, and Zn + FeSO4 → ZnSO4 + Fe
[C]. Mgo + H2O → Mg(OH)2, and Zn + FeSO4 → ZnSO4 + Fe
[D]. Mgo + H2O → Mg(OH)2, and 4Al +32O → 2Al2O3

In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate?

[A]. Lead sulphate (insoluble)
[B]. Lead acetate
[C]. Ammonium nitrate
[D]. Potassium sulphate


Rahul is writing some statements, choose the correct statement and help him:

[A]. The substance which combine or react are known as reactants.
[B]. The new substances produced in a reaction are known as products.
[C]. A chemical equation is a shorthand method of representing a chemical reaction.
[D]. All the above.

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

[A]. 1 : 1
[B]. 2 : 1
[C]. 4 : 1
[D]. 1 : 2


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?

[A]. Displacement reaction
[B]. Precipitation reaction
[C]. Double displacement reaction
[D]. Precipitation reaction, and Double displacement reaction

In which of the following statements is or are incorrect?

[A]. Some chemical reactions are characterized by the formation of a precipitate.
[B]. A precipitate is a liquid product which separate out from the solution during a chemical reaction.
[C]. Yellow precipitate of lead iodide is formed when potassium iodide solution is added to the solution of lead nitrate.
[D]. A precipitate can also form by passing a gas into an aqueous solution of a substance.


How do you come to know that a chemical reaction has taken place?

[A]. Evolution of a gas
[B]. Formation of a precipitate
[C]. Change in colour, temperature and state.
[D]. All the above.

It is advised that before burning in air, the magnesium ribbon is cleaned by rubbing with sandpaper. Why?

[A]. So that, it may readily combine with the oxygen of air.
[B]. So that, it may looks very shining.
[C]. So that, it can easily see by naked eyes at the time of burning.
[D]. None of the above.


The following reaction is an example of a: 4NH3 (g) +5O2 (g) → 4NO (g) +6H2O (g)

[A]. Displacement reaction, neutralisation reaction
[B]. Combination reaction, redox reaction
[C]. Displacement reaction, redox reaction
[D]. Redox reaction, neutralisation reaction

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).

Prepare Class 10 Science Chapter 1 Chemical Reactions and Equations from NCERT Textbook and then practice the questions given in the end of the chapter. At this stage MCQs are important for the revision of concepts and missing terms related to the chapters. If you read 5 times the same chapter from NCERT, every time you will get something new again. It means we have to revise the chapter again and again.

Is Class 10 Science Chapter 1 Chemical Reactions and Equations important for MCQ?

There are so many questions in chapter 1 of class 10 science, which may be asked in CBSE Board exams as MCQs.

Should I prepare Activities also, given in Chapter 1 of class 10 Science, for MCQ?

Activities are important not only for MCQ, but the theoretical questions also. In CBSE 2020 exams, there were three questions based on activities.

Are MCQ asked from back exercises of Class 10 Science chapter 1?

MCQs can be asked from entire book, whether it is intext questions or end exercises questions.

How do I prepare for MCQs of 10th Science Chapter 1?

Prepare the chapter 1 NCERT Textbook of class 10 science and read each important reaction carefully. MCQs are generally asked from with in the chapter text.