Chemistry · Oct / Nov 2022 · Paper 11 · Question 2
5070Separation and purification
A liquid, X, is distilled from a mixture using the apparatus shown. [diagram of distillation apparatus] During the distillation, the thermometer reads from 157 °C to 160 °C. Which information about liquid X is correct?
- AThe liquids in X may or may not be miscible (mix with each other).
- BX is a mixture that can be separated by distillation.
- CX must contain two liquids with boiling points 157 °C and 160 °C.
- DX must have been obtained by the fractional distillation of petroleum (crude oil).
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Correct answer: A. The liquids in X may or may not be miscible (mix with each other).
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