IGCSE O Level Chemistry MCQs - Chapter 9
Methods of purification Trivia Questions & Answers PDF Download - 4
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Methods of purification Exam Questions and Answers PDF Download: Test 4
What is true about pure substances?
- they have fixed and exact boiling point
- they have fixed and exact melting points
- they form only one post on chromatogram
- all of above
Oil and water is an example of
- miscible
- impure substances may also form the crystals
- filtrate
- suspension
Dissolving, filtering and evaporating are the methods of
- ice melting
- purification
- diffusion
- change of state
Crystallization of microchips does not involve
- a solute
- a crystal
- a solvent
- a soluble
Fresh seawater is referred to as impure water because it contains
- oxygen
- aquatic animals
- aquatic plants
- dissolved salts
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