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Q.

Is it true that dissolving common salt into a glass of water is a physical change ?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
A change in which a substance changes its physical properties, i.e., shape, size, colour, state, or appearance of the substance change is called a physical change, which is generally reversible in nature. In these physical changes, the chemical composition remains intact, and no new substance gets formed. For example, in dissolving common salt into the water, only the state of matter is changed. Hence it is a physical change. Physical changes can often be reversed; if we allow water to evaporate, we will get salt in solid form.
 
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