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Question

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).

Choose the correct one :

  1. Process-A is a chemical change.
  2. Process-B is a chemical change
  3. Both processes A and B are chemical changes
  4. None of these processes is a chemical change

A
Process-A is a chemical change.
B
Process-B is a chemical change
C
None of these processes is a chemical change
D
Both processes A and B are chemical changes
Solution
Verified by Toppr

The correct option is B Process-B is a chemical change
Change A is physical change - In this change, the liquefied gas changes it states from liquid to gas and hence no new substance are formed.

Change B is chemical change:- Burning produces new substance and hence the reaction can't be reversed back.

Gasburning−−−CO2+heat+othersubstance

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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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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.

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