Question

1. The liquified petroleum gas (LPG) is the gas which is used for cooking at home. In
the cylinder it comes as a liquid. When it comes out from the cylinder it become a
gas (Change A). Then it burns (Change B). What are the differences between change
A and B?​

Answer 1

Answer:

change a is a physical

change b is a chemical change

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Answer 2

Answer:

it is both chemical change and physical change..

physical change are reversible change...

chemical change are irreversible..

When it 'comes out' from the 'cylinder', it becomes a 'gas' (Change – A) then it 'burns' (Change – B). Thus Process A is a 'physical change' since Process A involves the change of state of matter from liquid to gas. This is a reversible process, as the gaseous LPG can again be converted to the liquid stage.

Explanation:

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