The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change-A) then it burns (Change-B).Choose the correct option from the following statements.
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-When the liquid comes out of the cylinder as gas, there are no new substances formed. There is a change of state in the matter. This change of state is called a physical change and is thus a reversible reaction. Hence, the process is never a chemical change
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