7 g of table salt is added to water in a dish. The dish is then heated until all the water evaporates. This is an example of a change.

Physical change

Explanation:

A physical change is one in which no new substance is formed and can be reversed using physical methods.

When we mix the salt and water, we have merely carried out a physical change. No new substance was formed. To recover the salt, we simply heat the solution to dryness.

Hence, this is an example of a physical change.

gas

explanation:

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