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You are given two samples of water label...

You are given two samples of water labelled as 'A' and 'B'. Sample 'A' boils at `100^(@)`C and sample 'B' boils at `102^(@)`C. Which sample of water will not freeze at `0^(@)`C? Comment.

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Sample 'B' will not freeze at `0^(@)`C as, it is impure water. It is because sample 'B' boils at `102^(@)`C will the boiling point of pure water is `100^(@)`C. It means this sample contains impurities. Only pure substance has sharp melting point.
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