Chemistry : Organic Chemistry – Some Basic Principles and Techniques

Acetylene reacts with HCN in the presence of Ba(CN)₂ to yield :

• 1, 1-dicyanoethane

• 1, 2-dicyanoethane

• vinyl cyanide

• None of the above

The following compound will undergo electrophilic  substitution more readily than benzene:

• nitrobenzene

• benzoic acid

• benzaldehyde

• phenol

The correct statement about the compounds (a),(b)and (c) is :

• (A) and (B) are identical

• (A) and (B) are diasteromers

• (A) and (B) are not enantiomers

• (A) and (B) are enantiomers

Which one of the following compound is most basic?

• (A)

• (B)

• (C)

• All are equally basic

The number of secondary hydrogens in 2, 2-dimethyl butane is :

• 8

• 6

• 4

• 2

Which of the following orders regarding relative stability of free radicals is correct ?

• 3° < 2° < 1 °

• 3° > 2° > 1°

• 1° < 2° > 3°

• 3° > 2° < 1°

In the reaction,

R - C ≡N + 4(H) $\stackrel{\mathrm{X}}{\to }$ RCH₂NH₂

X can be

• LiAlH₄

• H₂SO₄

• Ni

• 2KBr

The IUPAC name of the compound CH₂CONHBr is :

• 1-bromoacetamide 

• ethanoyl bromide

• N-bromo ethanamide

• None of the above

Which of the following is a dynamic isomerism?

• Metamerism

• Geometrical isomerism

• Tautomerism

• Co-ordinate isomerism

The reason for the loss of optical activity of lactic acid when OH group is changed by H is that:

• chiral centre of the molecule is destroyed

• molecules acquires asymmetry

• due to change in configuration

• structural changes occurs