Chemistry : Organic Chemistry – Some Basic Principles and Techniques

Two possible stereo-structures of CH₃CHOH.COOH, which are optically active, are called

• diastereomers

• atropisomers

• enantiomers

• enantiomers

Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by

• oxidation

• cracking

• distillation under reduced pressure

• distillation under reduced pressure

In the following the most stable conformation of n-butane is

Which of the following species is not electrophilic in nature? 

• Cl⁺

• BH₃

• H₃O⁺

• H₃O⁺

The IUPAC name of the compound having the formula 

• 3-butene-1-yne

• 1-butyn-3-ene

• but-1-yne-3-ene

• but-1-yne-3-ene

The stability of carbanions in the following



is in the order of 

• (1) > (2) > (3) > (4)

• (2) > (3) > (4) > (1)

• (4) > (2) > (3)  > (1)

• (4) > (2) > (3)  > (1)

The general molecular formula, which represents the homologous series of alkanols is:

• C_nH_2nO₂

• C_nH_2nO

• C_nH_2n+1O

• C_nH_2n+1O

The IUPAC name of is:

• 3,4-dimethylpentanoyl chloride

• 1-chloro-1-oxo-2, 3-dimethyl pentane

• 2-ethyl -3-ethylbutanonyl chloride

• 2-ethyl -3-ethylbutanonyl chloride

The correct statement regarding electrophile is

• Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile

• Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile

• Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile

• Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile

The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is

• Sublimation

• Chromatography

• Crystallisation

• Crystallisation