Purification and Characterization of Organic Compounds - Topic Wise Multiple Choice Questions (MCQ)
1 )
Fractional distillation is used when,
Difference in melting points of two solids is less
Difference in boiling points of two liquids is large.
Difference in boiling points of two liquids is small. ✔
Difference in melting points of two liquids is large.
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2 )
The formula representing a simple ratio of atoms of different elements present in a molecule of the substance is called
Empirical formula ✔
Molecular formula
Structural formula
Condensed formula
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3 )
Suggest a method to separate a mixture of methanol and acetone.
Simple distillation
Fractional distillation ✔
Fractional Crystallisation
Differential extraction
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4 )
Suggest a method to purify napthalene.
Sublimation ✔
Crystallisation
Differential extraction
Distillation
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5 )
Empirical formula of a compound is CH2O and its vapour density is 30. What is the molecular formula of compound?
C3H6O3
C2H4O2 ✔
C2H4O
CH2O
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