Question

1. Write the differences between physical and chemical changes​

Answer 1

Answer:

Explanation:

Physical Change - In a physical change, the molecules are rearranged while their actual composition remains same.

• Some example of physical change are freezing of water, melting of wax, boiling of water, etc.

• Physical change is easily reversible i.e original substance can be recovered.

• In physical change, no new substance is formed.

Chemical Change - In a chemical change, the molecular composition of a substance completely changes and a new substance is formed

• A few examples of chemical change are digestion of food, burning of coal, rusting, etc.

• Chemical change is irreversible i.e. original substance cannot be recovered.
• A chemical change is always accompanied by one or more new substance(s).

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Answer 2

Answer:

The change in which a substance undergoes a change in its properties are called physical changes.while that change in which two or more substances are react in each other and formation of a new substances are known as chemical changes.

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