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Column A
Column B
A change in which new substance is formed
Chemical changes
Changes in which physical properties like shape, size and state changes without formation of new substance
Physical changes
Those changes which take place in a long period of time
Slow changes
Those changes which we do not want to take place
Undesirable changes
A change that does not repeat again and again after a regular interval of time
Non-periodic change
Burning of fuel is a
Irreversible change
Explanation:
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