Question

state the difference between physical and chemical changes​

Answer 1

Answer:

Physical Change Chemical Change

When a substance undergoes a physical change, its composition remains the same despite its molecules being rearranged. When a substance undergoes a chemical change, its molecular composition is changed entirely. Thus, chemical changes involve the formation of new substances.

Physical change is a temporary change. A chemical change is a permanent change.

A Physical change affects only physical properties i.e. shape, size, etc. Chemical change both physical and chemical properties of the substance including its composition

A physical change involves very little to no absorption of energy. During a chemical reaction, absorption and evolution of energy take place.

Explanation:

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Answer 2

$\bf \Large \therefore \: \: Physical \: \: change$

The changes in which only physical property of a substance changes and no new substance is formed is called physical change .

• Examples :- Melting of ice, melting of wax, etc.

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$\bf \Large \therefore \:Chemical \: \: \: change$

The change in which new substance is formed after the change, it is called chemical change .

• Examples :- Burning of candle, rusting of iron, etc.