Chemical Reactions Quiz

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

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

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

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

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

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

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

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