Question

cbse class 9th subject science ch 2 topic 2.3 physical and chemical change and it's types of pure substance full notes
please give fast

Answer 1

Answer:

Here's your answer:-

Explanation:

Physical Changes

Physical Properties of a substance are those characteristic of a substance that describes its physical nature.

For Example colour, density, shape, size and volume are some physical properties.

Physical Change is a change which occurs when there is an alteration in the physical properties of a substance.

The physical change does not result in the formation of any new substance but can alter the shape and size of the existing substance.

Chemical Changes

The chemical property of a substance are those characteristic of a substance that describes its chemical nature.

For Example toxicity of a substance or how a substance reacts with other substances is its chemical property.

A chemical change or chemical reaction is any change in the chemical properties of a substance.

Whenever a substance undergoes a chemical change, a new substance is formed.

Examples of Chemical Changes:

Rusting of iron occurs when iron gets in contact with moisture

When a magnesium ribbon is burnt it radiates white light and converts into ashes

Formation of Medicines

Extracting of iron from the iron ore

Formation of plastic...

HERE'S YOUR ANSWER....

HOPE IT HELPS

Answer 2

Answer:

This is wrong answer and I didn ' t write this answer