Chemistry 2nd Paper
Time : 3 hrs. Marks.
75
Group - A
1. (a) What is kelp? Describe the process how
iodine is prepared from kelp. 1+4=5
(b) Describe two processes for the
preparation of phenol with reactions. 4
(c) Explain why 1 - alkyne forms acetalide
but 2 - alkyne does not form it? 3
(d) What is optical isomerism? What are the for
conditions optical isomerism? 3
Or (a) Describe the principle of preparation of
sulphuric acid by contact process. 5
(b) What is aqua regia? How gold is
dissolved in it? 4
(c) Explain that though halogen is ortho and
para director but it de-activates the aromatic ring. 3
(d) Describe the reactions of toluene with
chlorine at different conditions. 3
2. (a) Describe Laboratory preparation of pure
ethyne. 5
(b) Write down the mechanism of
electrophilic addition reactions of alkene. 4
(c) Write with a reaction how you will
identify chloroform in Laboratory? 3
(d) Write down the difference between 10,
20 and 30 amines?
Or, (a) What is haloform? Describe the
Laboratory preparation of Iodoform. 1+4=5
(b) Write short notes on- 2x2=4
(i) Kolbe reaction (ii) Reimer
Tiemann reaction.
(c) How is carbony group converted to
Methylene group? 3
(d) Write down the name and formula of
isomers of C5
H10O.
3
3. (a) Describe industrial preparation of
ethanoic acid from pyroligneous acid. 5
(b) What is Urea and what is melamine? Write
down their commercial preparation.. 4
(c) What is Z witter ion? Write down its
nature in acid and basic solution. 3
(d) What is amino acid? Show that glucose is
a reducing sugar. 3
Or (a) Describe laboratory preparation of
aniline. 5
(b) Write short notes on - 2x2=4
(i) Diazotization
reactions (ii) Gatterman reaction. 4
(c) What is picric acid? Write down its
preparation and uses. 3
(d) Aniline dissolves in 5% HCl solution -
explain. 3
Group -B
4. (a) Transition element forms coloured
compounds - Explain. 3
(b) What is ligand? Give example. 2
Or, (a) What is electrophilic and nucleophilic
reagent? Explain with example. 3
(b) What is free radical? How is it formd? 2
5. (a) How will you separate alkone, alkene and
alkyne from its mixture? 3
(b) What is tear cell? How is it prepared? 2
Or, (a) What is C. F. C ? How does it destroy
the Ozone layer? 3
(b) How will you synthesize from phenol the
following compound 5 ? 2
(i) Aniline (ii) Anisol.
6. Complete the
following reactions. 5
(i) C2 H5 OH + Excess
H2 SO4 (ii) C2 H5 OH + Na OH + I2
OH N2 Cl
(iii)
+ 
COOH |
(iv) Ehter
+ HI ( cone.) (v)
+ C2 H5 OH HCl
Or, (i) C2 H5 COOH + P2
O5
(ii) Ar - 
º NCl - + KCN
CuCN
(iii) 60 = C
TiO2 ?
+ CO2 + NH3 (iv) CH3 - CO - NH2 + I2 + Na OH 
? + ?
+ ?
+ ?
(v) 
C = 0
+ NH3
7. (a) Explain that a - Cyano ethanoic acid is
stronger than ethanoic acid. 3
(b) What is vinegar and glacial acetic acid?
Or, (a) How will you get the following from
ethanal - (i) Crotonaldehyde
(ii) Formalin
(b) Show the tautomerism of propanone. 2
8. (a) Show that hydrogen sulphide is on acid
and H2 SO4 is an oxidant. 3
(b) How will you identify S 2- ion in Sol n ? 2
Or, (a) Write down the formulae of the following
- 3
(i) T. S. P (ii)
Galena (iii) Sinaber.
(b) What happens when NH3
solution is added to Cu SO4 solution? 2
9. (a) Write the formulae of the following
(i) D. D. T. (ii)
B. H. C (iii) bleaching Powder. 3
(b) What is meant by inter halogen
compounds? 2
Or, (a) Write down the interconversion process
of ferrous and ferric salt. 3
(b) What is the passivity of iron? How is it
removed? 2
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