Total No. of Questions 12] [Total No. of Pages 02
M.Sc.(Previous) DEGREE EXAMINATION, MAY 2017
(First Year)
CHEMISTRY
Organic Chemistry
Time 3 Hours Maximum Marks 70
SECTION A
Answer any Four questions
(4× 7½ 30)
Q1) Write a note on hyper conjugation give examples.
Q2) Explain conformations of ethane.
Q3) Draw the potential energy diagrams for transition states and intermediate states with an
example
Q4) Write a note on ambident nucleophilas give examples.
Q5) Discuss diazonium coupling reaction with an example.
Q6) Explain the following
Auto-oxidation
Hunsdiecker reaction.
Q7) Explain hydrolysis of esters and amides.
Q8) Write a note on E2 and E1 reactions with an example.
SECTION – B
Answer all questions
(4× 10 40)
Unit-I
Q9) Explain the following
Fullerence
ii) Huckel’s rule
OR
Write the conformations of cyclohexane derivatives
Unit-II
Q10) Explain generation, structure, stability and reactivity of carbocation and carbanion
OR
Write a note on
Nucleophilic substitution at aliphatic trigonal carbon
ii) SNi reaction
Unit-III
Q11) Explain the following
NBS
ii) Chemoselectivity
OR
Free radical addition reactions
ii) Michael reaction
Unit-IV
Q12) Write a note on
iii) Benzoin condensation
iv) Perkin reaction.
OR
Explain factors affecting on elimination reactions.