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. (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.

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.
(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.