The gas we use in the kitchen is called liquified 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

Process – A is a chemical change.

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Process – B is a chemical change.

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Both processes A and B are chemical changes.

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None of these processes is a chemical change.

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Solution

The correct option is B Process – B is a chemical change.

● Process A: Involves the change in the state of LPG from liquid to gas as no new substance is formed. Hence, process A is a physical process.

● Process B: Involves the burning of LPG to form new substances carbon dioxide and heat. So, process B is a chemical change.

$Burning of LPG ⟶ C O_{2} + Heat + Light$

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Q. 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 bums(Change-B).

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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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(iv) None of these processes is a chemical change.

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.

Q. The gas we use for cooking is called liquefied petroleum gas (LPG). It undergo two changes:
Change A: LPG exists as a liquid inside the cylinder and it get converted to gas on coming out.
Change B: LPG burns to produce heat.
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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.

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The gas we use in the kitchen is called liquified 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​

The gas we use in the kitchen is called liquified 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