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The gas we use in the kitchen is called liquified petroleum gas (LPG). In the cylinder it exist as a liquid. When it comes out from the cylinder it becomes a gas (Change – A) then it burns (Change – B). The following statements pertain to these changes. Choose the correct one

The gas we use in the kitchen is called liquified petroleum gas (LPG). In the cylinder it exist as a liquid. When it comes out from the cylinder it becomes a gas (Change – A) then it burns (Change – B). The following statements pertain to these changes. Choose the correct one Correct Answer Process – B is a chemical change.

Explanation:

Chemical changes

  • If the chemical composition of a product is changing then it is a chemical change.
  • The changes are irreversible change.
  • And the final product is different from the initial one.
  • Example of chemical changes is burning of a candle, the ripening of fruit, curdling of milk and digestion of food etc.


Physical changes

  • if the chemical composition is remaining the same but only state changes, then it is a physical change.
  • The changes are reversible changes.
  • The state changes but the final products are the same as the initial one.
  • Example of physical changes is Freezing of water and Evaporation of water etc.


When it comes out from the cylinder it becomes a gas (Change – A) - Physical change.

When cylinder gas burns (Change – B) - Chemical change.

Related Questions

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Assumptions :
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