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The
question
paper
cornpulsory.
Ao
-3-
/q
faur'
Parts,
All
parts
are
'j
SubSect
Code :
34
{NS)
1Ox1=1O
P,,
qse;$
aJ
ts
l\c
ELf
1(
Englteh
Verslan
)
2ot
)@
3
2
t.
Part A
carries
l0
marks.
Each question
carrles
one mark.
Part.B
carries
l0
mafks.
Eaeh
qugstton
carrtes
troo
marks.
Pa-rt
C carries
15
marks. Each quesflopr
carries
three
marks.
Feirt
D
carries 35
marks.
Each question
carries..ftue
I
marKs.
'l
I
l
l
L
j
1
,I
3
iil) Write
balanced chemical
equations
and
draw diagrams
wherever
necessary.
,6
l
tv)
Use
log tables
and the simple
calculator
if
necessary.
:i
-
,,
t
Llse of scientiftc
catrculators'is.
not
atlowed
)'
'
il
2
I.
.Answer
all the
questions.
Each
question
e
es
one
mark.
(
Arrswer each
question
in
one
word
or in
one sentence
)
.
2..
Mention
'the
enthalpy
of mixing
(
A
mrx
H
)
vdlue
to
form
an
solution.
Wtrat.
is
a secondary
cell
?
For
the reaction
ZHI--+
H
z
4.'l
r,
Write,itq
molecularity.
3
4,
Itt
lnlitll$*l{u,ilffiilfl
ffi ffi
t}ffi
ffi
tlfi
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Second PUC Chemistry March, 2014 Question Paper
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Subject
Code :
34
(NS)
t'
5.
Write
the
catalyst
used
in
the decomposition
of
potassium
chlorate
to
get
potassium
chloride
and
oxygen.
Name
the refining
method
used
to
produce
semiconductors-
Give a,reason
for
chemical
inertness
of
Noble
gases.
H
aC
-
Br
+
AgF
+
H
rC
-
F
+
AgBr.
Name
the
reaction,
Mention
the hybridised
state of
caqbonyl
carbon
atom.
which
is the
nitrogenous
base
present
only
in
RNA.
but
not in
DNA
?
PART
-
B
IL
Answer
anylftue
of
the following.
Each question
carries
tu.ro
marks.
Sx2=lO
Aluminium
c,rystallises
in
an..i[cc
structure:
Atomic
radius
of
the
metal
is
125
pm.
calculate
the
edge
length
of
unit
cell
of
the
metal.
what
is
molar
conductivity
?
How
is
it'related
to the conductMty
of
q
solution
whose
concentration
is
C mol
m
-
3
?
13.
Define
collision
frequency.
Give
an
example
for Pseudo-first
order
reacUon.
14.
what
is I.anthanoid
contraction
?
Mention
one of
its
consequences.
15.
Complete
the following
reactions
:
i)
R-CH2-oH
a-Z?n-'
.::.....
6.
7.
8.
9.
:
10.
I
t.
t2.
teireqqul
1r
ill
ililrilIililil ilI
Iffi
ilfl
ililtffillililll]t lilIilil
Pag'e
lO
qf
l5
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3/7
Subject
Code :
Ba
NS)
ExpfAin
Rosenmund's
reduction
of
'benzoyl
chloride.
What
are food preservatives
? Give
an
example.
:
Mention
a
drug
which
can act,
both,
as an
analgesic
as
well
as
an
antipyretic.
Narne
an
artificial
sweetening
agent.
PART
-
C
III. Answer
any
fiue
of
the following.
Each question
carrie
s ttvee
marks.
bx3=
16.
L7.
r8.
l5
the
9.
Draw
labelled
diagram
of Hall-Heroult
El€ctrolytic
cell
for
extraction
of
aluminium.
write
anode
and
cathode
reactions.
20-
For
the
manufacture
of
Ammonia
by
Haber's
process.
write
equation
and optimum
conditions
for
malcmum yield
of
ammonia.
2L.
Write
the
equations for
i)
the action
of
so
2
with
chlorine
in
the
presence
of charcoal
ii)
the action
of
SO
g
with
concentrated
sulphuric
acid
rii)
the action
of
ozone-
with
lead
sulphide.
22.
Complete
the following
equations
:
(
cold and
dilyte
)
2FeSO4+HzSO++Clr-+
the
u,
ru,
ilt Iilil
Iililil[l
ilflililfl ilfl lllililfl
ffit ililItil
t9"igs--_qLl
Page
ll
oJ15
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8/20/2019 2nd PU Chemistry March 2014.pdf
4/7
Subject
Code :
34
(NS)
23.
Explain
the manufacture
of
potassium
dichromate
from
24.
With
reference
to the
first
row
transition
series
:
chr:omite
ore
ii)
uI.,
name
the
metal
which
possesses
maximum
number
of oxidation
states.
I
among
Zn+
2
and
Cu
+
2
which
is
colourless
?
between
Tl2
+
and V2
+,
which
ion
contains
25.
more
number
of
for
tLre
geometry
and
magnetic
sing
Valence
Bond
theory,
account
property
of
[
rui
(
CN
1
nl,
-.
(
Given
:
Atomic
number
of Ni
=
28 )
-vt
)
26,
Give
the
IUPAC
name
or:[ti(*ro)p
lt*
Draw cis
and trans
.
isomers
of
I
o,
(
Nns
)
zctz]
DART
-
D
r ____
IV.
Arrswer
any three
of
the following.
Each
question
carries../ftue
marks.
.
:
.
gxb=
Calculate
the packihg
efficiencyrin
simple
cubic lattice,
What
is l'renkel
defect
? Give
ayr
example.
.
27.
a
b)
\.
l5
,3
2
[ltfltffi
flili[fffiffi ilfiruffi
ffi u ll
]t
Page:'L2
o;t, 5
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2r8.
a)
:
Subiect pode
:
34
(NS)
on
dissolving
2.34
g
,of
solute
in
4o
g
of
,benzene,
the
boiling
point
of'solution
was
higher
than
that
of benzene
by
o.gl
K,
Ku
value
for
benzene
is'2.53
K
kg
mol
-
I.
calculate
the molar
mass
of
the
solute.
State
Henry's
law.
Write
its
mathematical
form.
z
Draw
labelled
diagram
of
Standard
Hydrogen
Electrode
(
SHE
).
Write
its
half cell reaction
and
Eo
value.
3
Calculate
ArGO
for the
following
reaction
:
o"l;)
*
Aslont
-
o"ijn,
*
A€("ri.,
(
Given
:
.E3ru
=
+
0.03
V,-'F
=
96'500,
C
).
il
,,i
b)
29.
a)
.l
30.
a)
3I.
a)
rill[lillll{ffiil1lilll t
b)
The
rate of
a
particular
reaction
doublgs
when
the
temperature
changes
from
3oo K
to.
Blo
I(.
calculate the
energy
of activation
of
the reaction.
I
Given
:
R
=
8.314
JK-
I
mol-1
].
b)
show
that
the
half-life per'iod
of
a first
order
reaction
independent
of
initial
concentration
of reacting
rspecies.
is
2
b)
Give
any
three
differ.ences
chemisorption.
i)
-
Mentlon
the
role
-bf
alum
watei.
Give
an
example
for
oil
between
physisorption
and
3
in
the,purification
of
drinking
dispersed
in
water
emulsion.
z
,
lllilillililililffiiltIItil Page
13
oJ
l5
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ediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/http://www.pediawikiblog.com/
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Subject.Code,:
34
{NS)
V.
{qpwer
an}r
jbur,of
the following,
Each.quesqo*,carriSs-fiue
marks.
,:
4x5=2iO
32.
a) i)
write
the equations
for
the
steps
rn
s
Nl
mechanism
of the
conversion
of tert.but}rl.bromide
into
tert.butyl
alcohol.
ii)
Haloarenes
are
l""q
reactwe.,
toward-s
:
nucleophtlic
substituuon
reactions
than
Haloalkanes.
Give
a
reason.
S
ii)
rClt" *r."@
E4plain
Willtamson's
ether
sylrthesls,
i)
Hsw
do
you
convert
benzoic
."idll
2
33,
a)
b)
34.
a)
1
ri)
Explain
the preparation
of
'phenol,
f,rom.
Cumer
r-e.
t
,.....,
OH
o+zn4
3
()
a
to henzamide
?
Writerthe
ii)
reaction.
Complete
the reaction
:
Anhydrous
AICI3I
HCI
3
b)
what
happens
when
carbonyl
compounds
are
treated
with
t4
lHtil+{fr{
tffiffiffillm
Page'
oJ I5
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;,,w:
he'
,,,
Hs,.c:,,y,
.
:.
':.:..,,
, ,,,
::,.H:
CH
oNH
z
ald
C
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