Chemical Reactions and Equations Quiz — 7 Free Questions

Question 1

During a typical endothermic reaction, does the reaction absorb or release energy from its surroundings?

Question 2

Is the thermal decomposition of calcium carbonate, or heating limestone, an exothermic or endothermic reaction?

Question 3

Name one substance added to fatty or oily foods to slow down rancidity.

Question 4

Between combination reactions and decomposition reactions, which type generally tends to be endothermic?

Question 5

Which law requires a chemical equation to be balanced?

Question 6

What happens to silver articles when they are exposed to air over time?

Question 7

Why are chips and other oily snacks often packed in sealed packets filled with nitrogen gas?

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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.