The gas we use in the kitchen is called liquified petroleum gas (LPG). In the cylinder it exist 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.
Topic: Physical and Chemical Changes
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Correct option is (iii)
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None of the processes are examples of chemical changes.
Process A is when the LPG is converted to the gaseous form. In this process, there are no changes in composition and hence it is an example of physical change.
On the contrary, process B involves the burning of the gas and it is a chemical process, the corresponding change is a chemical one. Burning of gas results in the formation of new products.
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