Chemistry-Purification and Characterisation of Organic Compounds

Test Preparation on Chemistry - Purification and Characterisation of Organic Compounds

1.

Which of the following is a technique of purification of organic compound?

1Oxidation
2Reduction
3Distillation
4Hydrolysis

2.

Which of the following is/are the method (s) of checking the purity of organic compounds?

1Chromatography
2Spectroscopy
3Both (a) and (b)
4Neither (a) nor (b)

3.

The formula representing a simple ratio of atoms of different elements present in a molecule of the substance is called

1Empirical formula
2Molecular formula
3Structural formula
4Condensed formula

4.

What is called the purification technique based on differences in the solubilities of the compound and the impurities in a given solvent?

1Sublimation
2Crystallization
3Distillation
4Fractional distillation

5.

A compound contains C = 90% and H = 10 %. Find empirical formula of the compound.

1C3H10
2CH2
3C3H2
4C3H4
54

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