CH-454
Purity and melting point
Chemistry · Secondary 3 · Easy · Purity and melting point
A solid sample of substance Q melts over a temperature range from 120 °C to 126 °C. Which conclusion about Q is most appropriate?
- Q is an impure substance.
- Q is a pure substance.
- Q must be a mixture of exactly two substances in equal amounts.
- Q must be a mixture that contains water.
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