Why the combustion of LPG gas is a chemical change

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Solution

Combustion of Liquified PetroleumGas (LPG) is a chemical changebecause, after its combustion, the new substance formed changes chemically and cannot be turned back intoLPG.

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Q. The LPG is an odourless and colourless gas. To detect the leakage of LPG gas a chemical named _________ is added to it.

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.

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.

(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. Question 1

Which of the following is not a physical change?

(a) Boiling of water to give water vapour
(b) Melting of ice to give water
(c) Dissolution of salt in water
(d) Combustion of Liquefied Petroleum Gas (LPG)

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