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Question

The purity of a substance can be tested by checking its _________ or __________.



A

Melting point or boiling point

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B

Boiling point

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C

Melting point

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D

Freezing point

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Solution

The correct option is D

Melting point or 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 point 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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