Chemical Reactions and Equations Quiz — 7 Free Questions

Question 1

What happens to a substance's oxygen content when it undergoes reduction?

Question 2

What is a balanced chemical equation?

Question 3

Which gas is produced when zinc reacts with dilute sulphuric acid?

Question 4

If 2 hydrogen molecules react with 1 oxygen molecule to form 2 water molecules, what does the number "2" written in front of H2 and H2O represent?

Question 5

What does the law of conservation of mass state?

Question 6

Besides colour change and gas evolution, name another sign of a chemical reaction.

Question 7

Besides a colour change, name another sign of a chemical reaction.

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About Chemical Reactions and Equations

This quiz covers Chapter 1 of CBSE Class 10 Chemistry, Chemical Reactions and Equations.

It opens with the basics: what a chemical reaction is, the signs that show one has happened, and how to write and balance a chemical equation using the law of conservation of mass.

It then covers the main types of chemical reactions -- combination, decomposition, displacement, and double displacement -- along with precipitation reactions and oxidation-reduction (redox) reactions.

The quiz continues with exothermic and endothermic reactions, before closing with the everyday effects of oxidation: corrosion of metals like iron, silver, and copper, and the rancidity of fats and oils in food.

Every question comes with a clear, simple explanation, so incorrect answers become as instructive as correct ones, whether you are revising for a school test or a board exam.