Chemical Reaction and Equations
Himachal Pradesh Board · Class 10 · Science
Most important questions from Chemical Reaction and Equations for Himachal Pradesh Board Class 10 Science board exam 2026. MCQs, short answer, and long answer questions with marks.
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What is an exothermic reaction?
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Reaction releasing heat
An exothermic reaction releases heat energy during the chemical process.
What causes iron to rust?
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Exposure to moisture and air
Rusting occurs when iron is exposed to moisture and oxygen, causing oxidation.
What is oxidation?
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Gain of oxygen
Oxidation involves the gain of oxygen or loss of hydrogen in a chemical reaction.
What is a displacement reaction?
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An element replaces another in a compound
In a displacement reaction, a more reactive element displaces a less reactive element from its compound.
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