Question

Q1. Explain the term 'chemical reaction' Q2. State whether a physical or a chemical change is involved during- a chemical reaction- giving reasons.

Answer 1

Explanation:

chemical reaction - is simply breaking of older bonds and formation of new bonds, in simple language formation of new substances from two or more reactants. chemical reaction can involve both physical and chemical changes like change in colour, formation of precipitate Etc.

Answer 2

Answer:

A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding