Question

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Answer 1

Thanks for asking the question!

Answer:

here's the answer to ur ques...

Explanation:

1. physical

2. natural

3. chemical

4. physical

5. melting of wax is physical change but burning of candle is chemical change

6. physical change as there is no new substance to be formed only there is change in state.

Extra information :-

Physical change is that change in which the physical properties of substance can be reversed i.e. size or shape.

Chemical change is that change in which a substance combines with another to form new substance or it is a change which causes a new substance to form.

Hope it helps!

Answer 2

Answer:

Explanation:

ANSWER:-

1. In a Physical Change, no new substance is formed.
2. Flooding of rivers is an Physical Change
3. Burning of wood is chemical change.
4. Revolution of Earth around the sun is Physical change
5. Melting of Wax is physical change.
6. Formation of Ice is physical change

Reasons:-

• Physical change is a change in which no new substance is formed.
• Flooding of Rivers is physical change as it does not make any new substance.
• Burning of wood is chemical as when we burn, it produces Carbon Dioxide as a new substance formation.
• Revolution of Earth is Physical as it does not produces any new substance.
• Melting of Wax is Physical as it does not produce new substance.
• Formation of Ice is physical as it changes to water which is not a new substance. It is also reversible.
• Physical Changes are reversible
• But chemical are not reversible.

The Strange case of Candle:-

• Candle has both Physical and Chemical change.
• Physical change is Melting of wax
• While chemical change is burning of wax into water vapours, water vapours and gases as new substance.