Bsc Third semester Chemistry (Generic Elective/Organic Chemistry)Generic question paper under the Dibrugarh University CBCS 2020.
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We have not been able to publish the entire question in the paper due to difficulty in typing, so we have only published some parts of it.The questions can be downloaded in pdf format by clicking on the link provided below
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3 SEM TDC GECH (CBCS) GE 3 (A/B)
2 0 2 0
( Held in April–May, 2021 )
CHEMISTRY
( Generic Elective )
Paper : GE–3
Full Marks : 53
Pass Marks : 21
Time : 3 hours
The figures in the margin indicate full marks
for the questions
GROUP—A
Paper : GE–3A
( Physical Chemistry )
1.Choose the correct answer from the
following :
(a)The solution of KCl which has the lowest
value of equivalent conductance is
(i) 1 M (ii) 0·1 M
(iii) 0·01 M (iv) 0·001 M
2.Which one of the following is correct for
a non-ideal solution?
(i) DH mix
= 0
(ii) DVmix
= 0
(iii) DVmix
¹ 0
(iv) DH mix DVmix
= 0; ¹ 0
If the standard electrode potential
of Zn(s) Zn (aq)
2+
and Cu(s) Cu (aq)
2+
electrodes are –0·76 V and +0·34 V
respectively, then the standard e.m.f. of
the cell Zn(s) Zn (aq) Cu (aq) Cu(s)
2+ 2+
will be
(i) +1·1 V (ii) +0·43 V
(iii) –1·1 V (iv) 0 V
GROUP—B
Paper : GE–3B
( Organic Chemistry )
( Marks : 27 )
1.Choose the correct answer from the
following :
(a).Which one of the following compounds is
most acidic?
(i) CH3—COOH
(ii) CH3—CH2—COOH
(iii) Cl —CH2—COOH
(iv) CCl 3—COOH
(a)Gabriel phthalimide reaction is used for
the preparation of
(i)
primary aromatic amine
(ii)
secondary amine
(iii)
aliphatic primary amine
(iv)
tertiary amine
7.Explain why carboxylic acids show much
higher boiling point compared to
alcohols of comparable molecular mass.
or
How will you prepare a-halocarboxylic
acid with the help of Hell-Volhard-
Zelinsky reaction?
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