CH-409
Purity and melting point
Chemistry · Secondary 3 · Easy · Purity and melting point
A sample of colourless liquid boils sharply at exactly 78 °C and the temperature stays constant until all the liquid has boiled away. What does this show about the sample?
- It is a pure substance.
- It is an impure substance.
- It must be a mixture of two liquids.
- It must contain dissolved solid impurities.
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.