IGCSE O Level Chemistry MCQs - Chapter 9

Methods of purification Multiple Choice Questions (MCQ) PDF - 6

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Methods of purification Questions & Answers PDF Download: MCQ Quiz 6

MCQ 26: Elevation of boiling points occur due to

presence of impurities
reduced pressure
high pressure
lower rate of evaporation

MCQ 27: Range of −5 ^oC to −25 ^oC is of

depression of freezing point of ice
latent heat of freezing
melting salted ice
melting pure ice

MCQ 28: The distillate is a liquid that

mixes together
condenses after distillation
does not sink due to very fine particles
a substance that will not dissolve

MCQ 29: Presence of impurities in ethanol (C₂H₅OH) will

lower the boiling point
raise the boiling point
lower the rate of evaporation
none of above

MCQ 30: A purple stain is obtained if the Ninhydrin spray is used to locate

peptones
protean
protein
amino acids

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