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Question

Which amongst the following is not an indicator of a chemical change?

A
Evolution of gas
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B
Release of heat
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C
Change in smell
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D
Change in shape
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Solution

The correct option is D Change in shape
Evolution of gas, release of heat and change in smell can be observed during a chemical change. However, the shape of a substance is a physical property and any change in physical properties cannot be considered as an indicator of a chemical change.

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