Chemistry : Organic Chemistry – Some Basic Principles and Techniques

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

The IUPAC name of CH₃-CH₂-CHO is :

• propanal-1

• 2-methylbutanal

• butanal-1

• pentanal-1

Vinyl chloride undergoes :

• only addition reaction

• only elimination reactions

• both (a) and (b)

• substitution reactions

Which of the following increases the octane number?

• Branching of chain

• Absence of double and triple bond

• Non-cyclic alkanes

• None of the above

An organic compound having molecular mass 60 is found to contain C = 20%, H = 6.67% and N = 46.67% while rest is oxygen. On heating it gives NH₃ alongwith a solid residue. The solid residue give violet colour with alkaline copper sulphate solution. The compound is

• CH₃CH₂CONH₂

• (NH₂)₂CO

• CH₃CONH₂

• CH₃NCO