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Question

Which property of a substance checks its purity?



A

Atmospheric pressure 

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B

Melting and Boiling point

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C

Homogeneity

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D

Both Atmospheric pressure and Homogeneity

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Solution

The correct option is A

Melting and Boiling point


Correct option is Melting and boiling point. A pure substance has a fixed melting point or boiling point at constant pressure. The purity of a substance can be tested by checking its melting or boiling point. If a substance is impure i.e. it contains traces of another substance, the melting and boiling point of that substance will change.


Chemistry

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