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1/5
%
(i)
'
The
question
papu
tris
ro*r.,,pa1.i:
e/g,faro
$r,
61r,:626n1
(Use
of
scientifi
c
calculator,
s
isd,*la-ea)
PY-
*,,
compulsory.
(ril
"yrite
.bala.nced,
,cherRical
r,.:,
tions
and
draw
lab,efied.
diaryams
wherever
required.
(iii)
Use
log
tables
and
the
simpre
carcurators
ifnecessary.
(Answer
each
question
in
one
word
or in
one
sentence)
1.:
,
1ffi41:istsiaarySolution?
:
.'.
,',
.
Z.
DefineMolarity.
:
.,'::
Write
the
S.I.
uniti
of
molar
conductivily_
:
Give
an
example
of
zero-order
reaction-
. .t
,
$t[t161:r
Physieal
AdsorT{ian
..
..
.
Wrile
the'composition
of
,eopper
matte,
Write
the
structure
of
XeFo.
wn*atareFreons?
'
' :
"'
,:]
-
,
::
PART-,A
t
Answer
all
of
the
f,ollowing
:
'
9.
Give
the
IUPAC
name
of
CHTCHO.
:
10i
'N
thep"1$npresentinhair.
l
;$,$i{
-
l0x1-10
3.
5.
-|
&.tR;1
:
l
i
t'
li
I
l
li
Second PUC Chemistry July, 2014 Question Paper
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8/20/2019 2nd PU Chemistry July 2014.pdf
2/5
II.
PART
-
B
(Each
question
carries
two
marks)
11.
calculate
the
nurnber
of
atoms present
in
FCC
crystar.
12.
What is
Conosion
? Name
one
method
to prevent
I 3.
Derive
an expression
for
half-rife
period
of first
order
reaction.
Give
reasons
:
(i)
Actinoids
show
variable
oxidation
state
(ii)
Zr
Tnd,Hlhave
almost
identical
radii
15.
Explain
Kolbe,s
reaction.
16.
How
are
Carboxylic
acids prepared
from
nitriles
?
17,
What
are
antiseptics'?
Give
example.
18.
What
are
food preservatives
?
Give
an
example.
:
PART
_
C
Answer
any
five
of
the
following
:
(Each
question
camies
three
marks)
5x2:10
5x3=15
I
14.
III.
l9'
Describe
the
three
steps
involved
in
the leaching
of
bauxite
to get
pure
alumina.
20.
How
is
ammonia
manufactured
by
Haber,s
process
?
21'
Describe
the preparation
ofiozonised
oxygen
with
an
equation.
Name
the
ozonised
produc1obtainedwherttheozoRe.reactswitlrte"a-s.lpr,ioe'
I
{
Code
No.34
(NS)
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\/
22.
'CornBlete
the
following.gquations
:
(i)
2Al
+
3Ctr---->
(ii).H2S+Clr7--+
",
(iii)
8 NH3
+
3Ctr---->
(excess)
23.
How is
Potassium
dichromate
prepared
from
chromite
ore
?
il
lvVhy
do
transition
elements
forur:comrplex
compounds
?
Nmrethe,eleirtent
which
state
any
three postulates
of wemer
theoiyof
coofiination
compounds.
Using
VBT
account
for
geometry
and
maggetiiproperty
of
[M(CN]ol]
lV.
Answer
any
three of
the
following
:
27.
(al
calculate
the
p'acking
effielency.iu
a
siudg
Dubic,lattice.
(b)
What
is Frenkel
defect
?
Giveexarnple,
,
28. (a)
The vapour
pressure
of
pure
benzene
at
certain
temperature
is
0.850
bar.
39
grams
of
benzene
(molar
mass
78 grams),
vapour
pressure
of
the
solution,
(b)
What
happens
to the
solubility'of,
tl, gas
in
a liquia
with:increase
in
temperature
?
Give
reason.
29,:
.(a)
Describe
the construcJion
aad
wo{ktng,dfitandarg
hydrogen'electrode.
(b)StateFaraday'sSecondLawofElectrolysis..l.l-i4,'
":-.
. 1:
3
24.
,(
26.
PART
*
D
j
3x5=15
,
3
2
Code
No.34
G{S) 9
:
i
)
.
P.T.O.
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8/20/2019 2nd PU Chemistry July 2014.pdf
4/5
30' (a)
The
rate
df
reaction
increases
by
2
tirnes
when
ttr"
ternj"rature
of flie
raised
from
300
K
to
310
K.
calculate
the
energy
of
activation.of
the.reaction.
(Given
R
:
8.3
14
J/K/mole)
(b)
write
any
two
differences
between
morecularity
and
order
of
a
31.
(a)
what
is
coagulation
of
a sor
?
Name
two
methods
by
which
a
can
be coagulated.
(b)
What
is
Homogeneous
Catalysis
?
Give
example.
V.
Answer
any
four
of
the
following
I
(Each
question
carries
5
marks)
32.
(a)
Mention
the
major product
formed
in
the
folrowing
reactions
:
Lyophobic
sol
4x5=20
3
(i)
CuHrBr
+
14*
dry
ether,
(ii)
2-bromopen,*"
alc
KOH,
A,
(iii)
CH3C/ +
NaI
(b)
write
the
equations
for
the
steps
in
S*l
mechanism
of
conversio,
of
tert-
butylbromide
into
tert-butyl
alcohol.
33.
(a)
What
is
the
effect
of
(i)
erectron
withdrawing
group
on
acidity
of
phenors.
(ii)
erectron
donating
group
on
acidity
of
arcohols
(iii)
boiling
poi,t
of
arcohols
on
increasing
number
of
carbon
atoms.
(b)
Give
equation
for
Williarnsons
ether
synthesis.
34.
(a)
Write
equation
for
(i)
the
reaction
between
Carboxylic
acid
and
pC/r.
(ii)
the
reaction
between
formaldehyde
and
conc
KoH.
(iii)
the
formation
of oxime
from
car-bonyl
compou'd.
(b)
Explain
aldol
condensation
with
an
example.
dry
acetone
Code
No.34
(NS)
10
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8/20/2019 2nd PU Chemistry July 2014.pdf
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