Essential Chemistry for IGCSE - Particles And Purification (Section 1 - No. 30)
If a substance is impure, how will this affect its melting point?
The melting point will increase.
The melting point will remain unchanged.
The melting point will decrease.
The melting point will broaden and decrease.
Explanation
Impurities lower the melting point and cause the melting range to be broader.
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