Class 10 Science Chapter 1 MCQs with Answers | Chemical Reactions and Equations Important Questions

Class 10 Science Chapter 1 MCQs with Answers | Chemical Reactions and Equations Important Questions Set 2

📋 Questions 20 ⏱️ Time 30 min

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A* 100% A 80-99% B 60-79% C 40-59% D 0-39%

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Question 1 of 20

Addition of oxygen to a substance is called:

Reduction Oxidation Neutralization Decomposition

Question 2 of 20

Removal of oxygen from a substance is called:

Oxidation Reduction Corrosion Rancidity

Question 3 of 20

Copper powder on heating forms:

Cu₂O CuSO₄ CuO CuCl₂

Question 4 of 20

The colour of copper oxide is:

Red Green Black Blue

Question 5 of 20

CuO + H₂ → Cu + H₂O is an example of:

Redox reaction Combination reaction Neutralization reaction Double displacement reaction

Question 6 of 20

In CuO + H₂ → Cu + H₂O, hydrogen is:

Reduced Oxidised Unchanged Catalyst

Question 7 of 20

In CuO + H₂ → Cu + H₂O, CuO is:

Oxidised Reduced Catalyst Neutralised

Question 8 of 20

Rusting of iron is an example of:

Corrosion Rancidity Neutralization Combustion

Question 9 of 20

The coating formed on silver due to corrosion is:

Green Black Red Blue

Question 10 of 20

The coating formed on copper due to corrosion is:

Green Black Brown White

Question 11 of 20

Corrosion occurs due to attack by:

Moisture and acids Oxygen only Water only Heat only

Question 12 of 20

Oxidation of oils and fats causes:

Corrosion Rancidity Precipitation Neutralization

Question 13 of 20

Rancidity changes the:

Colour only Mass only Smell and taste Volume only

Question 14 of 20

Which gas is flushed into chip packets to prevent rancidity?

Oxygen Hydrogen Nitrogen Carbon dioxide

Question 15 of 20

Respiration is an:

Endothermic reaction Exothermic reaction Neutralization reaction Double displacement reaction

Question 16 of 20

Which reaction produces heat?

Exothermic reaction Endothermic reaction Photolytic reaction Electrolytic reaction

Question 17 of 20

Which reaction absorbs energy?

Exothermic reaction Endothermic reaction Neutralization reaction Combination reaction

Question 18 of 20

Fe₂O₃ + 2Al → Al₂O₃ + 2Fe is a:

Combination reaction Decomposition reaction Displacement reaction Double displacement reaction

Question 19 of 20

Dilute HCl reacts with iron filings to produce:

Iron chloride and hydrogen gas Iron hydroxide and chlorine gas Iron oxide and water No reaction

Question 20 of 20

Magnesium burns in air to form:

Magnesium chloride Magnesium sulphate Magnesium oxide Magnesium hydroxide

This post contains 20 important MCQs from Class 10 Science Chapter 1 “Chemical Reactions and Equations” based on NCERT/CBSE syllabus with answers and explanations for quick revision and exam preparation.
FAQ

Q1. Is Chapter 1 of Class 10 Science important for exams?
Yes, it is very important and includes frequently asked MCQs and reactions.
Q2. What is the main topic of this chapter?
It covers types of chemical reactions, balancing equations, oxidation, and corrosion.
Q3. How to prepare MCQs quickly?
Revise definitions, reaction types, and practice MCQs daily.
Q4. Are these MCQs useful for boards?
Yes, they are based on NCERT and CBSE exam patterns.

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Class 10 Science Chapter 1 MCQs
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Class 10 Science Chapter 1 MCQs with Answers | Chemical Reactions

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Download important Class 10 Science Chapter 1 MCQs with answers and explanations. Based on NCERT Chemical Reactions and Equations for quick exam revision.