NCERT class 10 science chapter 1 – “Chemical Reactions and Equations” discusses we can determine whether a chemical reaction has taken place if there is (a) change in state (b) change in colour (c) evolution of a gas (d) change in temperature. Practice multiple-choice questions (MCQs) to prepare for the objective questions for the CBSE Board Exams. We have provided Class 10 MCQ Questions on the “Chemical Reactions and Equations” along with detailed explanations. CBSE is putting more focus on MCQs as they help in understanding the concepts thoroughly.
Check Complete Class 10 MCQ – Class 10 Science MCQ
MCQs are very different from subjective questions so practicing and understanding how to arrive at correct answers in MCQs is very important. Students should practice all the MCQs with answers provided to review the key concepts and familiarize themselves with the types of questions that might come in the board exam.
Check Complete Syllabus – CBSE Class 10 Science Syllabus
You will also like – CBSE Class 10 Sample Paper – Free PDF Download
Check Chapter 2 – Acids, Bases and Salts Class 10 MCQ
Topics covered in “Chemical Reactions and Equations”
- Chemical equations
- Writing a Chemical Equation
- Balanced Chemical Equations
- Types of chemical reactions
- Combination Reaction
- Decomposition Reaction
- Displacement Reaction
- Double Displacement Reaction
- Oxidation and Reduction
- Corrosion
- Rancidity
CBSE Class 10 Science Chemical Reactions and Equations MCQs – PDF Download
Answers –
Summary for NCERT Class 10 Science Chapter 1 – “Chemical Reactions and Equations”
- A complete chemical equation represents the reactants, products and their physical states symbolically.
- A chemical equation is balanced so that the numbers of atoms of each type involved in a chemical reaction are the same on the reactant and product sides of the equation. Equations must always be balanced.
- In a combination reaction two or more substances combine to form a new single substance.
- Decomposition reactions are opposite to combination reactions. In a decomposition reaction, a single substance decomposes to give two or more substances.
- Reactions in which heat is given out along with the products are called exothermic reactions.
- Reactions in which energy is absorbed are known as endothermic reactions.
- When an element displaces another element from its compound, a displacement reaction occurs.
- Two different atoms or groups of atoms (ions) are exchanged in double displacement reactions.
- Precipitation reactions produce insoluble salts.
- Reactions also involve the gain or loss of oxygen or hydrogen by substances. Oxidation is the gain of oxygen or loss of hydrogen. Reduction is the loss of oxygen or gain of hydrogen.
Best Reference Books for Class 10 Science
- NCERT Textbook + Exemplar Problems-Solutions
- Foundation Course Physics, Chemistry and Biology
- NCERT at your Fingertips Science
- 100 Percent Science
- CBSE 10 Years Chapterwise Topicwise Solved Papers AKA CBSE Champion
- CBSE Chapterwise Question Bank
- CBSE Score More 15 Sample Question Papers
