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Q.

Is it true that water causes molecules in a piece of chalk to break apart?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is false.
Substances which dissolve in water are called soluble substances like sugar, salt, milk, alcohol etc. In contrast, substances which do not dissolve in water are called insoluble substances like sand, oil, chalk etc. The molecules of any substance can be broken apart by water when that particular substance is soluble in water. Since chalk is not soluble in water, its molecules cannot break apart.
The correct statement would be that water does not cause molecules in a piece of chalk to break apart.
 
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