Chemical Reactions Quiz

Play an AI-generated podcast conversation about this lesson

Define oxidation with an example.

Oxidation is the loss of electrons by a substance. Example: Rusting of iron.

Explain reduction with an example.

Reduction is the gain of electrons by a substance. Example: Conversion of iron(III) oxide to iron by heating with carbon.

What is the element 'X' that turns black on heating in air? Name the black colored compound formed.

The element 'X' is copper, and the black colored compound formed is copper oxide.

Why do we apply paint on iron articles?

We apply paint on iron articles to prevent them from coming in contact with oxygen and moisture, thus preventing rusting. Signup and view all the answers

Why are oil and fat containing food items flushed with nitrogen?

Oil and fat containing food items are flushed with nitrogen to prevent oxidation and rancidity, maintaining their freshness and quality. Signup and view all the answers

Define corrosion with an example.

Corrosion is the gradual destruction of a metal due to a chemical reaction with its environment. Example: Rusting of iron. Signup and view all the answers

Define rancidity with an example.

Rancidity is the spoilage of fats and oils due to oxidation. Example: Rancid butter. Signup and view all the answers

In the group activity, which reactions were exothermic and which were endothermic?

The reactions involving potassium sulphate and fine iron fillings were exothermic, while the reactions with ammonium nitrate and anhydrous copper sulphate were endothermic. Signup and view all the answers