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Question

Identify the physical property that can help to check the purity of a substance.


A

Atmospheric pressure

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B

Melting and boiling point

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C

Homogeneity

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D

Both Atmosphericpressure and Homogeneity

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Solution

The correct option is B

Melting and boiling point


A pure substance has a fixed melting point and boiling point at constant pressure. So the purity of a substance can be tested by checking its melting or boiling point. If a substance is impure, its melting and boiling point will change.


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