Question

which of the following is a physical change 1)heating limestone strongly
2)adding zinc to Copper Sulphate
3)adding potassium chromate to Barium sulphate solution 4)heating nepthalene​

Answer 1

Answer:

heating of limestone strongly

Explanation:

Quick lime is chemically calcium oxide. When it is added to water filled in a bucket, it forms calcium hydroxide (slaked lime) and reacts vigorously by releasing large amount of heat which is an exothermic reaction.

Answer 2

Answer:

Mark as braniest answer PLZZ..

here is your Answer.....

option (4) is a physical change

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