1 .	Which one of the following is not a chemical change?
[ A ]    Burning of coal in air [ B ]    Fermentation of sugar cane juice [ C ]    Crystallisation of table salt from sea water [ D ]    Cracking of petroleum
Answer : Option C Explanation : In chemical change a new substance is formed. During crystallisation of table salt from sea water no new substance is formed hence, it is not a chemical change.
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