O Level Chemistry MCQs - Chapter 9

Methods of purification Multiple Choice Questions (MCQ Quiz) PDF - 1

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Chemistry: Methods of purification MCQs Questions PDF Download

MCQ: Crude oil can be fractionally distilled to produce

A) diesel

B) petrol

C) paraffin

D) all of above

MCQ: What is true about mixtures?

A) they have a range of boiling points

B) they have a range of melting points

C) they lack of exact concentrations

D) all of above

MCQ: Alternative techniques to crystallization involve

A) decanting only

B) centrifuging

C) filtration

D) decanting and centrifuging

MCQ: Vacuum distillation is used in

A) under high pressures

B) under low pressures

C) gentle heating

D) quick heating

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

A) first crystals are the most pure

B) impure substances may also form the crystals

C) it turns into gas

D) it turns into aqueous solution

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