JNTU Exam Papers Organic Chemistry Ist Sem Apr/May 2008

JNTU Exam Papers

Organic Chemistry Ist Sem Apr/May 2008

 

1. Discuss about Electrometric effect. [16]

 

2. Write the reaction mechanism for the following:-

(a) Benzoin condensation

(b) Aldol condensation. [8+8]

 

3. (a) Why do you use peroxides in the anti-Markonikoff addition of HBr to alkenes?

(b) Explain the stability order of simple alkyl free-radicals by structural theory.

[8+8]

 

4. (a) Discus the methods of resolution of recemic mixtures.

(b) What is the criterion of enantiomerism? [10+6]

 

5. How will you assign E-Z notations to geometrical isomers? Explain with suitable

examples. [16]

 

6. (a) What are high polymers? How are they classified ? explain with examples.

(b) With the help of a block diagram, discuss the manufacture of polyethylene

terephthalate. [8+8]

 

7. (a) Give any two methods of preparation of the following.

i. Pyrrole and

ii. Quinoline.

(b) How will you explain the greater basicity of pyridine as compared to that of

pyrrole? [8+8]

 

8. Give an example for each of the following

(a) Mordaut dye

(b) an azo dye

(c) Vat dye

(d) Triphenyl amine dye

Give the synthesis of any two of them?

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