IGCSE O Level Chemistry MCQs - Chapter 9

Methods of purification Multiple Choice Questions (MCQs) PDF Download - 1

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Methods of purification Questions & Answers PDF Download: MCQ Quiz 1

MCQ 1: Crude oil can be fractionally distilled to produce

diesel
petrol
paraffin
all of above

MCQ 2: What is true about mixtures?

they have a range of boiling points
they have a range of melting points
they lack of exact concentrations
all of above

MCQ 3: Alternative techniques to crystallization involve

decanting only
centrifuging
filtration
decanting and centrifuging

MCQ 4: Vacuum distillation is used in

under high pressures
under low pressures
gentle heating
quick heating

MCQ 5: Which statement is true about when the hot molten liquid cools?

first crystals are the most pure
impure substances may also form the crystals
it turns into gas
it turns into aqueous solution

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