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FOURTH SEMESTER (CUCBCSS—UG) DEGREE EXAMINATION, APRIL 2020

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~ Define specific rotation.

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Chemistry

CHE 4B 04—ORGANIC CHEMISTRY—I
Maximum : 80 Marks

Three Hours
Section A (One Word)

Answer all questions.
Each question carries 1 mark.

Homolysis of a bond results in
isomers.

Dimethy] ether and ethyl] alcohol are

Represent the functional group of ester.

Baeyer’s reagent is
Give an example for anti-aromatic compounds.

Define resonance energy.

Number of chiral centers in lactic acid

Name the intermediate formed in ozonolysis reaction.

Name a carcinogenic polycyclic arene.

Hybridization of carbon in carbocation is
(10 x 1 = 10 marks)

Section B (Short Answers)

Answer any ten questions.
Each question carries 2 marks.
) : _

Represent tartaric acid in Fischer and sawhorse projection.

Formic acid is a stronger acid than ethanoic acid. Justify your answer.

Discuss Freund reaction for cyclo alkanes.
1-butyne or 2-butyne, which is more acidic ? Justify your answer.
Turn over