IGCSE Chemistry 0620/21/O/N/21 Q1

Question

1. Decane has a freezing point of –30 °C and a boiling point of 174 °C.

A small sample of decane is placed in an open beaker in an oven at a temperature of 120 °C and at atmospheric pressure for 24 hours.

What happens to the sample of decane?
A It boils.
B It evaporates.
C It melts.
D It sublimes.

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Answer ( 1 )

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    2022-05-13T13:28:28+08:00

    Ans: B

    Decane is liquid at 120 degree Celsius, in an oven and under atmospheric pressure for 24 hours will make it evaporate.

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