Question

What do you mean by chemical change and chemical reaction? Explain with suitable examples.

Answer 1

A change that involves the formation of new substances from the original substances is known as chemical change.
For example, Curdling of milk, Rusting of iron, etc.

A process that leads to a chemical change by the transformation of one or more substances into new substances is known as a chemical reaction.
For example, Iron + Oxygen $\to$ Water Rust