The gas we use in the kitchen is called liquified petroleum gas .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],identify the types of changes. Justify reason.

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Solution

Change A- is a physical change since the state is changing but no new substance is formed.
Change B- is a chemical change since the gas burns to give CO₂, H₂O and light i.e new products are formed.

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Q. Liquefied petroleum gas is used in kitchens. When the gas is in a cylinder, it is in the liquid state. When it comes out of the cylinder it becomes a gas (change A), then it burns (change B). Identify the processes A and B with proper explanation.

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). The following statements pertain to these changes. Choose the correct one.

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Question 11
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). The following statements pertain to these changes. Choose the correct one.
Which of the processes is a chemical change?
(i) Process – A is a chemical change.
(ii) Process – B is a chemical change.
(iii) Both processes A and B are chemical changes.
(iv) None of these processes is a chemical change.

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The gas we use in the kitchen is called liquified petroleum gas .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],identify the types of changes. Justify reason.

Change A- is a physical change since the state is changing but no new substance is formed.Change B- is a chemical change since the gas burns to give CO2, H2O and light i.e new products are formed.

Change A- is a physical change since the state is changing but no new substance is formed.
Change B- is a chemical change since the gas burns to give CO₂, H₂O and light i.e new products are formed.