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Question

All pure substances have characteristic melting and boiling points.

A
False
B
True
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Solution
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Correct option is A. True
Yes, all pure substances have characteristic melting and boiling point.

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Give reasons for the following:

Pure substances have fixed melting or boiling points.


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A pure substance has a very sharp melting and boiling point. True or false?
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Why boiling point increases and Melting point decreases on adding impurities to a pure substance?
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The diagram shows the melting and boiling points of four different substances. Which substance has a melting point at −20∘C and a boiling point at 160∘C? Also identify the two substances having same boiling points.
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