Veer Narmad South Gujarat University 2010 B.E Organic Chemistry & Unit Process - 2 ( Sem3 )( Chemical ) - Question Paper
RN-8049
B. E. - II (Sem. Ill) (Chemical) Examination May/June - 2010 Organic Chemistry & Unit Process
Time : 3 Hours]
[Total Marks : 100
Instructions :
Seat No.:
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Fillup strictly the details of signs on your answer book.
Name of the Examination :
B. E. - 2 (Sem. 3) (Chemical)
Name of the Subject:
Organic Chemistry & Unit Process
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-Section No. (1,2,.....) |
Student's Signature
1&2
(2) Q 1 and 4 are compulsory and carries 20 marks each.
(3) Question 2, 3 and 5, 6 carries 15 marks each.
(4) Answers to the two section should be written in separate answer books with figures and mechanism wherever necessary.
1 (a) Fill in the blanks : 10
(i) _is adopted as a standard anti knock fuel
and has been assigned the octane number 100.
(ii) _and_have established that organic
colouring matter on reduction gave colourless products which regained original colour on oxidation.
The stability of carbanion is increased if the electron _ groups are introduced.
(iii)
(iv)
(v)
An elimination reaction is one in which the formation of_or _ bond takes place.
On reaction of acids with alcohols _ are
formed.
(vi) Alkyl halide on reaction with sodium hydrogen sulphides give _.
(vii) Usually the nitration is carried out with_and
_ mixture.
(b) Explain different types of organic reactions with 5 suitable examples in each reaction.
(c) Explain the preparation, properties and uses of 5 carboxylic acid. Also explain the formation of different derivatives of carboxylic acids.
2 Answer the following : (any five) 15
(a) Write the preparation of chlorobenzene with its properties.
(b) Explain the formation of free radicals, carbonium ion and carbanion.
(c) Write a note on Witt's theory of colour and chemical constitution.
(d) Explain the preparation of synthetic petrol.
(e) Write a note on Ribose Nucleic acid.
(f) Explain canninzaro reactions with mechanism.
(g) Write the preparation of oxalic acid and its uses.
3 Answer the following (any three) 15
(a) Explain Nucleophillic substitution reaction with examples and its mechanism.
(b) Write a note on composition of crude oil with proper identification of different fraction.
(c) Write in detail the classification of dyes with examples.
(d) Explain measurement of strength of acids with examples.
(e) Define polymers. Classify it into different classes. Explain about biopolymers.
4 (a) Fill in the blanks : 10
(i) Thiophene is manufactured by passing a mixture
of_and_through tube containing A1203
catalyst at 670 K.
(ii) Common soaps are _ salts, of higher fatty
acids.
(iii) _ + NaOH -> Soap + Glycerol.
(iv) _ was first synthesized by Berthelot in
1873 bypassing acetylene through red-hot tube.
(v) Molecular formula of Glucose is _.
(vi) Glucose is fermented by yeast to produce_.
(vii) For oxidation reaction process we can use_
as catalyst.
(viii) Polyethylene is available in the two forms of_
and _.
and lower aldose to higher aldose with suitable
examples.
(c) Discuss naphthalene and its derivatives in detail. 5
5 Answer the following : (any five) 15
(i) Sulphonation and sulphation.
(ii) Five member ring compound with example
(iii) Chemical reactions of benzene
(iv) Soaps and detergents
(v) Chloroform
(vi) Formaldehyde
(vii) Glucose
(i) Geometrical isomerism in tartaric acid
(ii) Chemistry of phenol
(iii) Chemistry of starch
(iv) Aldose to ketose and ketose to aldose
(v) Halogenation process.
RN-8049] 4
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