NEET Questions - Chemistry - Purification and Characteristics of Organic Compounds

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

Oxidation
Reduction
Distillation
Hydrolysis

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

Chromatography
Spectroscopy
Both 1 and 2
Neither 1 or 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

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

Sublimation
Crystallization
Distillation
Fractional distillation

Empirical formula of a compound is $ CH_2O $ and its vapour density is 30. What is the molecular formula of compound ?

$ C_3 H_6 O_3 $
$ C_2 H_4 O_2 $
$ C_2 H_4 O_2 $
$ CH_2 O $

An organic compound contains C = 36%, H = 6%. What is the empirical formula of compound ?

$ C_3 H_6 $
$ CH_3 $
$ CH_2 O $
$ C_2 H_2 O_2 $

What should be the property of solvent used in crystallisation ?

Impure compound should be sparingly soluble in it at room temperature.
Impure compound should be appreciably soluble in it at higher temperature.
Both 1 and 2
Neither 1 nor 2

Which method of purification of organic compound is useful to separate liquids having sufficient difference in their boiling point ?

Sublimation
Distillation
Filtration
Crystallisation

An organic compound on analysis gave C = 48gm, H = 8gm and N = 56gm. Volume of 1.0 gm of the compound was found to be 200 ml at STP. What is the molecular formula of the compound ?

$ C_4 H_8 N_4 $
$ C_2 H_4 N_2 $
$ C_{12} H_{24} N_{12} $
$ C_{16} H_{32} N_{16} $

Which of the following method can be empolyed to separate a mixture of Chloroform (b.p334k) and aniline (b.p 457k) ?

Distillation
Crystallisation
Sublimation
All of these

Insulin contains 3.4% Sulphur. The minimum molecular weight of insulin is

350
470
560
940

Which element is estimated by Carius method ?

Nitrogen
Carbon
Hydrogen
Halogen

What is relation between the following pairs

Identicle
Geometrical isomer
Position isomer
2 and 3 both

Distillation under reduced pressure is used when ...

liquid has very high boiling point and decompose at or below its boiling point.
liquid has very low boiling point.
liquid is insoluble in water.
liquid is insoluble in organic solvent

In Carius method, 0.099 g compound gave 0.287 gm AgCl. What is the % of Cl ?

35.4
71.7
46.2
80.5

NEET Chemistry Questions: Purification and Characteristics of Organic Compounds