Karnatak University 2006-3rd Sem B.Tech Chemical Engineering Chemistry Department - Question Paper

NATIONAL INSTITUTE OF TECHNOLOGY KARNATAKA, SURATHAKAL, DK.

Chemistry Department III Sem. B.Tech. (Chem. Engg)

ORGANIC CHEMISTRY (Elective) CY 205

Quiz Test -1 (08-09-2006)

Time: !/2 hr. [Max. Marks: 20]


Note: ans the subsequent ques. briefly.


1. The optical rotation observed with a polarimeter was 12° 301, when its polarimeter tube of length 20 cm, was filled with a sample of sugar solution having concentration 0.1 g per ml. Under the similar conditions, distilled water showed rotation of only 20'. If the specific rotation of pure sugar is + 66.5°, compute the purity of sugar in the solution.
Distinguish ranging from diastereomers and enantiomers, giving suitable examples.
What do you mean by racemic changes ? discuss any 1 method of resolution.
Write the structures of possible stereoisomers for tartaric acid. Assign the R and S
configurations for every asymmetric carbon atom in them.
discuss the stereochemistry of diphenyl compounds with specific examples.
discuss any 3 factors influencing confonnational stability, with examples.
Write a brief note on conformational analysis of cyclohexane.
provide the synthesis of the subsequent compounds from diethyl malonate.
(i) succinic acid (ii) adipic acid (iii) veronal.

Earning:   Approval pending.