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Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Third semester B.Tech degree examinations (S) September 2020

Course Code: CH207
Course Name: CHEMISTRY FOR PROCESS ENGINEERING- I

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any two full questions, each carries 15 marks. Marks
1 a) Which of the following should be stabilized by resonance to a greater extent? (3)
( 1 _ இ
व 4 । = न
(ಬೃ (8)

b) Draw the sigma complexes corresponding to the nitration of aniline at ortho, meta वात (6)
para positions. Explain the directing effect of -NH> group.

c) Propose a mechanism for the following reaction. (6)

ലം ஞ்‌ AN
+

ക്‌ ப
Br ‏سے‎ OCH,
2 a) Predict the major products and propose a detailed mechanism for the following (6)
CH;
1
| |
+ HBr H,¢ —C—O—_O—_-C—CH;

b) Explain the aromaticity of furan, pyrrole and thiophene. Comment on the basicity of (5)

pyrrole.
c) What are annulenes? Draw the structure and explain the aromaticity of [14]-annulene. (4)
3 a) Identify the following name reaction and explain thecomplete mechanism. (5)
இட OH OH ௦
| ‏طم‎ 50 CE ‏ك2‎
‎ह+
‎6 ‏سل د‎
3 Ph
Ph
Ph
b) Explain the benzyne mechanism with an example. (5)

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