what do you mean by pure substance and why Theory melting point and freezing point and are same
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pure substance is a substance which is made up one only one kind of atom or molecule.
Melting and Freezing points are not same.
Melting and Freezing points are not same.
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1.The process by which a liquid changes into its solid from is called freezing.
2. The process by which a solid changes into its liquid from is called meiting
2. The process by which a solid changes into its liquid from is called meiting
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