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2 C 41200
Section B (Paragraph)
Answer questions up to 30 marks.
Each question carries 5 marks.

Explain the stability order of 1°, 2° and 3° carbocations.
Distinguish between intermolecular andintramolecular hydrogen bonding with suitable examples.
Draw the planar representations of dextro, laevo and mesotartaric acids and explain their optical
activities.
State and explain Markovnikov’s rule with a suitable example.

How will you convert : (i) Benzene to acetophenone ; (ii) Benzene to parabromotoluene ? Give

equations.
Explain the directive influence of nitro group in aromatic electrophilic substitution.
Briefly discuss benzyne intermediate mechanism.
(Ceiling of marks : 30)
Section C (Essay)
Answer any one questions.

Each question carries 10 marks.

(a) Discuss the relative stability of the different conformations of butane with potential energy
diagram.
(b) Explain the geometrical isomerism in fumaric acid and maleic acid.

Illustrate the acidity of terminal alkynes with suitable reactions. Also explain the reason for the

acidity of terminal alkynes.
(1 x 10 = 10 marks)

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