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Effect of Change of Temperature on State Change of Matter

Question 21Yo...

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Question 21
You are given two samples of water labelled as 'A' and 'B'. Sample 'A' boils at $100^{\circ} C$ and sample 'B' boils at $102^{\circ} C$ . Which sample of water will not freeze at $0^{\circ} C$ ?

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Solution

Sample 'B' will not freeze at $0^{\circ} C$ as it is impure water. It is because sample 'B' boils at $102^{\circ} C$ while the boiling point of pure water is $100^{\circ} C$ . It means this sample contains impurities. Only pure substances have sharp melting point.

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Effect of Change of Temperature on State Change of Matter

Standard VII Chemistry

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