Question

1. What is a physical change and chemical change .Give two examples for each?
2. A burning candle shows both physical and chemical changes . Explain?
3. What are reversible and Irreversible changes .Give one example for each?​

Answer 1

Hey buddy!! Here's it

1. The changes which can be reversible after being used are physical changes. where's the changes which are irreversible are chemical changes.

Eg: stretching a rubber is a physical change.

burning of a paper is a chemical change.

2. A burning of candle shows both physical and chemical properties bcoz when candle is blowed after being fired , it's left over can be used to make a new one, where's if it melts completely it burns ..which is a physical change.

3. Reversible means the objects which can be used again and again like a rubber band, where's irreversible is totally opposite of it, it can't be used second time like a burned paper....

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