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1
M
ax . T
ime : 3
hrs
.
M
ax. M
arks :
200
(P
ART
1
. PH
YSIC
S
1
. The
p
hysic
al qu
antity
w hic
h has the
di
m
ensio
nal fo
rmula
M
1
T
-
3
Is
(1) Co
mp
ressibility (2 ) D ensity
(
3) So
lar con
stant
(4 )
Surfac
e tens
ion
2 . A
ball
Is dr
opped
do
wnwa
rds . A ft
er 1
seco
nd
anoth
er ball
Is d
roppe
d
d
own
ward
s om
the
sam
e
point.
Wha
t Is
th
e
dista
nce be
tween
them
afte
r 3
s
econd
s
(1
) 20m
(2 )
9 .8m
(3 )25
m (4
) 5
0
m
3 . f
a part
icle o
f ma
ss m
Is mo
ving
In a
;. :hori
zontal
drcle
of
radi
us r w
ith a
cen
-
tr ipetal
force
1 / r
2
),
the total
energy
I
s
(1)
i
(2
) 2
r
r
(3
)
-
. .
(4 ) -
_ _
r
2
r
4.
A
cub
ical b
lock of si
de
a Is movi
ng
with
vel
oci ty v
on a
ho
rizon
tal
sm
ooth
pla
ne
as
show
n
. I
t hits
a r
idge a
t point
0 . T
he
angu
larsp
eedof
th
e
b
lock
afte
r It hit
s 0
Is
+
+
'
'
1) 3v
/2a
3 )
3v/ 4a
(2 ) J3
v/ ..fl.a
(4 ) Zero
5. A
s
econd
s
pend
ulum I
s
m
ounte
d
In a
ro
cket .
Its per
iod o
f osc
illatio
n d
e
creases
when
the
rocket
(1)M
oves u
p with
un ifo r
m acce
leratio
n
(2 ) M
oves
up w
ith a un i
form v
elocity
(3 )
C ome
s
down
w ith
uni fo rm
acc e
leratio
n
(4)
M ov
es rou
nd the
earth
in a
geosta tio
nary
orb
it.
6
. Con
sider
a car mo
ving
al
ong a
straig
h t
horiz
ontal road
with
a sp
eedo
f 7
2km/h .
If
the
coefficient
of
static
f r ict ion
be
twe
en
the
tyres
and
the r
oad
Is0
.5 , t
he
sho
rtest
dist
ance in
w
hich
the car ca
n
be s
toppe
d Is
[g 10 m
s
-
2
(1
) 20m
(2 ) 40
m
(
3 ) 3
0m
(4 ) 7
2 m
7 . A f
orce acts
on
a 3 .0
gm p
article
In such
a w
ay that
the
positio
n of
the
par
ticleas
a
. unc
t ion o
f ti
me is
giv
en
by
x 3t
- 4
r + t
3
,
wh
ere
x Is I
n metr
es and
t
is in
sec
onds
.
h
~
w ork
done
durin
g the
flr s
t 4 seco
nds
is
1 )
530
m
J
2 ) 4
90 mJ
(3 )
450 mJ
(4)
2 .
28J
8
. Abo
dy
of mass
2 k
g collid
es w
ith a
wall
with
speed
1
00 m/
s
and
r
eboun
ds w
ith
same
s peed
. If the
t i me
of co
ntact
was
1/50
s econ
d,
the
force
exert
ed on
the
wall
is
(1)
10
4
N (2 ) 4N
3 )2
X 1i
N
J
4) 8 N
9. f
mo
ment
um Is
In
crease
d
by 20,.,
then
K .E
.
I
ncrea
ses by
(1)
55
(2) 77
(
3) 66
(4) 4
4
10. T
he decre
ase
In
t
he po
tentia
l
energ
y of
a ba
ll of m
ass
20 kg
whic
h
f
al ls
f rom
a
heig
ht
o
f 50 e
m Is
(1) 98
J
(2) 968
J
(3 )
19
80 J
(4 )N o
ne of t
hese .
11
. In are
ctang
le ABC
D
(BC
= 2AB
) . T he
mom
ent o
f Inert
ia al
ong
whic
h
a
xis
will
bem
inimu
m
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E
A r - - - - - - L - - - - - 8
1) EG
H
~
F
o - - - ~ - - - ~ c
G
(2) HF (3) BD
(4) BC
12. In a carbon monoxide molecule , the
carbon and the
oxygen
atoms
are
sepa-
rated
by
a
di
s
tance 1.
12
x
10
-
10
m .
The
distance of the centre of mus
from
the
carbon atom Is
(1)0.64
x
10 -
10
m
3)
0.51
x
10 -
10
m
(2) 0.56
x
10 -
6
m
(4) 0.48
x
10 -
10
m
13. For a satellite escape
velocity
Is
11
km/s. If the s
atellite
is launched at an
angle
of 60 with the vertical , then es-
cape velocity will be
11
(1) 33 km ./s (2)
f3
km / s
n..J3
km / s (4)11 km/ s
14.
I f
the radius of the
earth
shrinks by
~ (mass remaining same) ,
then
the
value
of accelerat
ion due
to
gravity
changes
by
1)
1 (2)3 (3) 4 (4) 2
15. In which case there Is maximum ten
sion In the wire, If
same
force Is applied
on each wire
(1) L
=
400 em
,
d
=
0.01
mm
2) L = 300 em, d = 0.03 mm
3) L
=
200
em,
d
=
0.02
mm
4)
L = 500
em,
d = 0.05
mm
16
. If the surface tension of water Is
0.
06 Nm -
1
,
then
the capillary rise in a
tube of diameter
1
mm
is 0 =o
)
(1) 3.86 em (2) 3.12 em
(3) 2.44
em 4 )
1.22 em
17. 1 mole of
gas
oc
cupies
a volume of
100 ml at
50 mm
pressure.
What
Is the
volume occupied by two moles of gas at
100
mm
press
ure
and a t same tempera-
ture
(1) 500
ml
(3) 100
ml
2) 200
ml
(4) 50
ml
18.
What
is the velocity
of
wave
In
mona-
tomic gas having pressure 1
kilo
pascal
and
dens
i
ty
2.6
kg
/ m
3
.
(1) 8.9 x 1Q m/s (2) 3.6 m/ s
(3)Zero (4 )
Noneofthese
.
19
. A
gas
mixture
cons
ists
of
2
moles of
oxyge n and 4
mol
es
of
argon at tempera-
ture
T. Neglecting all
vibrat
i
onal modes
, the total internal energy of the
system
is
(1)11RT
3)
15R
T
(2 )9RT
(4 )
4RT
20
. A diatomic gas initially at l8C is
compressed
adiabtically to
one
-
eighth
of its original volume. The temperature
after compression will be
(1) 144C 2)891C
3)887C (
4)18
C
21. The
radiant
energy om the sun inci
dent
n o ~ l l y at the s
urface of earth
is
20
k
cal
/ m
2
min
.
What would
have
been
th4 radiant energy
incident
nor-
mally on the earth,
if
the sun had
a tem-
perature twice of the present
one
.
(1)
80
kcal/ m
2
min
(2) 320
kcal/ m
2
min
(3)
40
kcal/ m
2
min (4) 160 kcal/ m
2
min
22.
The ratio .
of
energy
of
emitted radia-
tion
of
black
body at 27C and 927C
is
(1) 1 : 256 (2) 1 : 64 (3) 1 : 16 (4) 1 : 4
23. Two waves of lengths 50 em and 51 em
produced 12 beats per second. The ve
locity of sound
is
1)
360
rn/s
(2) 340
rn/s
(3) 331 m /s (4) 306 rn/s
24
. A whistle giving out 450
Hz
ap-
proaches
a
stationary
observer
at
a
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4) A magnetic field is applied nonnally
38
.
The wavelength
of
the first line
of
Bal-
mer
series is 6563
A. The
Rydberg con-
stant for
h y ~ o g n is about
1) 1.09
x
1
0Sperm
2 ) 1.09
x 1
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48. Assertion (A) : Two systems which are both in
thermal equilibrium with a third system are in
thermal equilibrium with
each
other.
1) 2) 3)
49. Assertion (A) : Heating engineers use u-values,
rather than k-values when calculating heat
losses through walls, windows
and
roofs.
1) 2) 3)
50.
Asserti
on A)
:Two
satellites of mass m1
m2
( m 1>
fll2)
are going around the earth in
orbits of raddi s q
and f2 (
q >
f2) .
1) 2) 3)
51. Assertion (A) : If a convex lens of glass is im-
mersed in water its power decreases.
1) 2) 3)
52
Assert
io
n (A) : When light
passes
from one
medium to another of different density the only
quantity which is unchanged is its wavelength.
1) 2) 3)
53. A ss
erti
on A ) : The relative velocity of two
photons travelling in opposite directions is
C.
1) 2) 3)
54. Assertion A ) : A thin aluminium disc spin
ning freely about a central pivot
is
quickly
brought to rest when placed between the poles
of a strong U-shaped magnet.
1) 2) 3)
55.
Ass
ertion (A) :
If
the law of gravitation be
comes inverse
cube
law even then a line join
ing the sun and the planet sweeps equal areas
in equal time ntervals.
1) 2) 3)
56.
As
sertion (A) : A balloon stops rising after at
taining a certain maximum height.
1) 2) 3)
57. Assertion (A : A table cloth
~ n
be pulled
from a table without dislodging the dishes.
1) 2) 3)
58. Asse rtion (A) : Alpha particles produce more
intense ionisation than beta particles.
1) 2) 3)
Reason (R) : The heat flows spontaneously
from a system at a higher temperature to a
sys-
tem at lower temperature.
4)
Reason (R) : The u-value of a single brick wall
is
L W m
4)
Rea.on
R) : They
will
have same velocity.
4)
Reason
R) : In water it behaves
as
a concave
lens.
4)
Reason
R)
:
The wavelength of light
is
not
re-
lated to the refractive index of the medium.
4)
Reason
R) : The rest mass of a photon
is
zero.
4)
Reason (R) : A current induced in a disc rotat
ing in a magnetic field produces a force
which
tends to oppose the disc's motion.
4)
Reason
R
) : A planet moves . in an elliptical
path.
4)
Reason R) :
Upthrust due to air decreases
with height till
it
just balances the weight of
balloon.
4)
Reason (R) :
To
every action there is
an
equal
but opposite reaction.
Reason (R)
charged.
4)
Alpha particles are positively
4)
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59.The velocity of sound in air increases due to the
presence of moisture
. 1) 2). . 3)
60
.AssertiOn (A) .:
The
positive
ray
particles are
more
ma5 rive
than
electrt>ns.
. 1)
2)
3)
Reason
: (R) :
The
presence of moisture in air
lowers the density
of
air.
4)
Reason (R) : Positive rays
are
deflected
by
a
magnetic field to a greater extent than cathode
rays .
4)
ANSW ER.s W rrH HINTS cl EXPLANATIONS
1
Ans. 3)
S o ~
constzmt is energy received per When the rocket accelerates upwards g in-
unit
area
per
second creases
to
(g + a)
I.e.
ML
2
6 .Ans .
(2) Friction = JlMg
~ - ~ = M 1 T a
L2-r . H.ence retardation = Jlg = 0.5 x 10 = 5 rns-
2
2. Ans. 3)
1 . 1
Sia
~
= 2
X
10
X
(9) - 2
X
10
x14
=25m
111
Ans (
4
)m-
1 .
2
1
'
. - , =
2
1.e.,
mv-
=.-
. r r-
.
r
e2 . .
J
e2
.. K.E: = -
2
and P.E.= F d t r =
r , r
. . e2 e2,. j
: Total energy = K.E. + P.E.= -
2
= - -
2
r r r
I. Ans. 3)
Angular momentum with respect 0
before colliding with
0
v ~
On
collision, the block will rotate about the
side
passJng through
0 .
. By law of conservation
of angular momentum
+ +
v 0
, , ~ ' '
=>
Where I is
the
moment of inertia of the block
about the block about. the
axis
perpendicular
to
the plane passing through 0.
5.
Ans.
1;
T
= 1t-{ .
9
Using- - u
2
= 2ax
Taking v
~
0,
u
=
20ms :-
1,
wegetx
= 40m
l .
7. Ans.
4)
W
2 m ( ~ - ~ )
v
=dx = ...: St + 3t2
dt .
vo = 3 m/s
and
v4 =19
mls
1 . .
W =2
X
0.03
X
19Z
-
3
2
) =5.28 J
s.
Ans
.
3) .
ap
=
F6t
Here
llp = 2
x
2
x
1OQ
=
400 ms -
1
4oo
4
F = 1/50 =2
X
10 N
L
. Ans. 4) K =
2
m
(
120 )
2
100
P . 2
K
, ._ 144L -144 K
- 2m - 2m-
. 1
..
aK=K -K=0.44K=44 K
10. Ans. (1)
aUp
= mgh = 0 X 9.8 X 0.5 =
98
J
11. Ans. (1) AbOut EG, the maximum distano
from the axis is the least.
12
.
Ans. (
1
)
Rc ;, 12
x
0+
16 x 112x 10-
10
M
12+ 16
16 -10
=
28
X 1.12 X
10
. m
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13 .Ans. (4) Esca
pe velocity
is
sa
me
f o r ~
an
-
gles of projecti_on
.
14. Ans.
2)
g
=
~
R
6g 6R
.
-2R
= - 2
X
1
.5= -3
.
g .
F L
15
.
Ans
.
(1)
y
=A
6L
. .
_ _ _ :. _ F
:. _ 4F ( L)
- Ay
- 1t
(d2
4) y
- 1tY
d
2
Here
L d
2
is m a x i
m um for wire
In option (1)
16. AN. (3) Use
ascent formula f
o ; capillary
rise .
17
. Ans. (3) For 1
mole of gas,
50
X
100 = 1 X R X
T
For 2 m
oles of gas,
5
0 X
10
0 RT
v
X
100
=2
X
R
X
T :
v
X
100 =
2RT
:::>
V= 100 m l
_
.rn 'J'3 x 10
3
18 Ans. 4) C
= V ~
=
2
.
6
=
m
19.
A
ns.
(1) O xygen
is
d
iatomic g
as,
h
ence its
energ
y
o
f two mole
s
.
5
~ 2
x2
RT=5RT
Argon is
a mon to
mic hence i
ts.internal
en
ergy of 4 mole
s
3
=
4
x
2 RT =6RT
Total Internal
energy = 6
+
5
) RT
=
1R
T
-.
r-1
T
V
r - 1 H
14
20. A ns. (2)
T1V1 = 2
2 ere
r =
21 : Ans
. (2)
A cc
ording to
Stefan slaiA: E oc: -r4
E
1
(T1)
4
-E2 = T2
~ ~ =
i
rf
= 1 ~
:::>
E2 =
320
kcal/ m
2
m i
n
22
.
An
s.
(1) E oc
-r4
23
.
Ans.
(4)
v . v
v
v
nl
= Al = 0 .
50
. a
nd n2 = A2
=
0 .
51
.
[ 1
1 ]
6n
= nl
- n2 = v 0 .
50- 0 .
51
= 12
- 12 X 0
.
5
1 X 0 .50 - 3
06
I
.
. v - 0 .
01 -
m s
24
.
Ans
.
(1)
The
apparent
fM quency heard
by
the observer is giv
en by
n =
-v-n
v -
vs
Since so
urce is m o v in
gwith velocity
v, to
w
ards the statio
nary observer
)
=
33
0
x
450 =
3
2
3
9
7
x
450
=
500
Hz
330 -33
25. Ans.
1 ) The
wave equation
is
y = A s i n ( r o t - k
x + ~ )
~ 6 ~
(3)
~
=
.5
x1 Olt:
os(l'Orct
-
5x)
=
57i cos(101
tt-
Sx
)
..
~ ) m a x =51t m / sec
27. Ans . (
3)
d -
DA.
- 1 X 5
) -
7
= 10 - 4
=0 1
-13 .-
5x10
-
3
m
mm
28.
Ans
(1 ) S
ince
P is
ahea
d- of Q by
CXf and
path differenc
e be tween P
and Q is
/ 4.
Therefore
at A.
phase di
fferenCe is zer
o, so
in-
. ensity
is
41
.
A t
C
it
iszero and
at
B, the phese
differenc
e is 90 . so in
te nsity is
21
29
. Ans . (3) Energy
is conserved in th
e interfer
e
nc e of light.
30.
Ans. (4
)
t
=
1)
-
~ 2 }
.=
1.6
- 1
~ - -
0.6
1
= 60 =1
00cm
f
=100cm
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I = m
(
r
+ m ( i
) 2 = m;
2
H
ence t
he corr
ect ch
oices is
(2) .
6.
Ans .
1)
The ce
ntripet
al forc
e is pr
ovided
by
the
grav
itation
al att
raction
of
the e
arth .
H
ence
the cor
rect ch
oice is
(1 )
7. A
ns . 2)
W h
en s to
nes ar
e unlo
ad ed i
nto th
e
w
ater in
the t
ank, th
e v o l
u me
of wate
r dis
plac
ed is
equal
to the
vo lum
e of
t
he ston
es.
This is
less
than th
e volu
m e
of wate
r havin
g
weig
ht equ
al to t
h e we
ig h t
of s tone
s beca
use j
the d
ensity
of sto
nes is
greate
r
th
an
that
of
w
ater. H
ence
the w
ater le
vel fa
lls , wh
ich is
choice
(2)
8. A
ns
.
(
1) Mas
s of
w
ater in
first tu
b e is
m
=
n ~ h p
Now
,
surfac
e tensi
on
hpg
r hp
gr
c
r - --
- -
-
- 2
-
2
whe
re h is th
e h
eight t
o whic
h wa te
r
rises
in
the s
econd
tub
e and
r
its
radius
. S inc
e
r = 2
r, h =
h / 2
Ther
efore ,
t he m a
ss
o
f ~ a t e r
i
n the s
econd
capilla
ry tube
is
m
=
nr
2
h p =
t
(2r)
2
p
= n ~
h p
= 2m
= 2
x
5
= lOg
Hence
the co
rrect ch
oice i
s (1)
Fl...l
9.An
s.
) Here
=m1v
and
There
fore,
Gi
ven
Thu
s
,
r
l
L
2=
2
L1
and r2
=2
/1
1
1
1
2 = 2
X 2
)2 .= 8
1
0 Ans
. (2)
The l
atent h
eat
of vapor
ization
of
w
ater is
very near
ly 540
calorie
s per
gram .
Therefore
heat
released in
the
condensat ion
of x g ra
m o
f steam
=
5
40
x calo
ries .
The la
ten
t
h
eat
of fus
ion
of ice is
very
nearl y
80
calor
ie s. T
herefo
re, heat
requ
ired to
conve
rt
y g
ram o f
ice at 0
C to
wate
r
at
Thus
or
l
00C
=
80
+
y +
1
00
y
= 1
80y calo
ries
18
0 y
= 540x
l =
X
H en
ce the
correct
choic
e
is
(2 )
11
. Ans.
(3) PV
Y= const
an
t
12 .
Ans . (2
) If a
force
F is ap
pl ied t
o a sp
ring of
force c
onstan
t k
a
nd
the
spring
exten d
s by a
n
a
mount
x,
then F
=
kx
T
he exten
sion x
p rod u
ced in
a sp r
ing is pr
o
po
rtiona
l to its
leng t
h . T hu
s,
if
t
he spr
ing
is
cut in to
three
e
qu
al
piece
s , the sa
me f
orce F
will
pro
duce an
exten
sion
x/3 in a
p iece .
I
f
k
is
the is
the f
orce
cons ta
n t of
t
he piec
e , we
ha
ve
Theref
ore
or
F
= k x/
3
k'
-=k
3
k
=3k
Thus , the force e constan t of
ell
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P
AaT
2
. CH
MIS
TR)
1.
26
m
l ofC 0
2 ar
e pa..
dov
er hot
cok
e
.
Th
e m
axim
um vo
lumeof C
O for
med
Is:
1)
32
ml
2 )
52
ml 3 )
15
ml
4) 10
ml
2 .
Unsul
tablllt
y of n
ucleu
s ls
du. ~
1)
Lo
w
prot
on - el
ectron
ratio
2 ) H
i
gh
proto
n - ele
ctron r
a
t
io
3)
Hi
gh p ro ton - neutronratio
4 ) H
igh n
e utron
- prot
on
ra
tio
3 . B
ohr s
ato
mic
the
orygav
e
th
e id
ea o
f :
1)
Nucleu
s
(2 )
S h
a
pe
o f sub
- lev
els
3
)
Qu
an
tum
numb
ers
4 ) S
tatio na
ry
s
tates .
.
Whic
h has m
axim
um rad
ioacti
ve ac
tiv-
Ity
:
1)
Uranium
{2 }
Plutonium
3)
Rad iu m
4 )
Tho
rium
5. Ove
rlapp
ing of
2 hy
brid
orbita
ls ca
n
lea
d
to th
e form
ation
of
:
{1
} t b
ond
2 }
a- bon
d
3
Ionic bond
4 )
N o
ne
. NFs
Is :
(1
) Ha
ving
m ore
dipole
m o m e
nt that
NH a
2
)
Having
low v
alue of
dipo
le mom
ent th
an
NH3
3
) E
le
ctroval
ent co
m
p
o
un
d
4 )
N
on - p
ola r co
m
poun
d .
7
. Th
e
co
mpou
nd
havin
g hig
hest bo
iling
point :
1)
CH4
2
) CH
3
0H
3 )
CH3B
r
4 }
C
H3Cl
8.
An
eleme
nt
A
(at. w
t. =
75 a
nd
B
(at
.
w
t. =
25)comb
ine t
o fo
rm a co
mpou
nd.
The compound contains
75
rct
A by
w eig
h t.
The
form
ula of
the com
poun
d
wil
l be
1)
AB
2 )
AB
3
3
)
A
3
B 4
) A
2B
9
The
n
umbe
r o
fm U
lle
quiva
lents ln
100
m l
of0
.5 NH
CI solu
tion I
s :
1) 20
0
2 ) 100
3)
50
4) 25
10
. Num
ber
of
el
ectron
s
In volv
ed In
the
N-
du
ction
o f
Crt
O
-
Jon
In
acidi
c
so
lu
ti
on to
Cr
3
+ I
s :
1) 4
2) 6
3 )
3
4 ) 4
11
. Stro
nger
the
ox
idisin
g
agent
,
g
reate
r ls
th
e:
1 )
Oxid a
ti
o n potential
2 )
R
edu
c
tion p
oten tia
l
{3 }
Ioni
c
be
h a
vior
4 ) N
one
12
. In
a r
eactio
n 4 mo
le of
e
lectro
ns
are
tran
sferre
d to on
e
m
ole o
f
H
N03
wh
en I t
acts as
an
oxid
ant. T
he poss
ib le
reduc
tion
p
l oduc
t
ls
1)
1 mo
le NH
3
2 ) 1
mole
of NO
z
3 ) 1/2
m
ole N
20 4
) 1/2 )
m o
le N2
13.
The
volume
at
NTP
occupied
by
11
g
of
C02l
s :
{1} 11
.2litre
2
} 2 .8\it
re
3 )5
.6 li
tre .
4 ) 2 . 2
4 litre
14
.
Which
I
s not corr
ect
for
cata
lpt.
I
t :
1
) R
educes
activa
tion e n
ergy of
react
ion
2 )S
pecifi
c i n n
ture
3 ) E
nhanc
es
th
e
rate o f
re
ac
tion
in
both
d
i-
rectio
ns
4 )
Changes enthalp y o
f reac
tion
15
.
An albu
min s
ol
con
taini
ng so
dium
ch
loride
a
s an
Imp
urity
can be
st
be
freed
of th
is I
mpur
ity by
:
(1) El
ectrop
ho resis
(2
) Dialy
sis
3}
Pr
ecipita
tion
4 )
Ftltra
tion .
16
.
Which
r
eacti
on giv
es m
oreprod
ucts u
a
re ult
ofIn
creas
e Inpre
ssure
:
1)
2HI
t
H2
+
l2
2) 250
2
+
z
2S
OJ
3)
H
20 +
CO
+-
H2 +
{4}H
2 + B
r2
2HB
r
17
. H
CI does
n
ot beh
ave u
add
In :
1)
C
f
6 2
) N
H 3 3 )
H zO
4 )
No ne
1
8.
The m
ixed s
alt amo
ng the
follo
w ing I
s
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8/11/2019 Solved Paper 2000
11/23
1)
CaCO
C lz
2
) N a
K S 04
3) Mg(
OH)Cl
4 )
A ll
19.
I f
s
and S
are
resp
ectiv
ely solub
ility
an
d
solubi
lity pro
duct
of a sp
ar ingl
y sol-
u
ble bin
ary
electro
lyte, th
e n :
( l l
s = s
112
2l
s= 11
2s
3)
s
=
s
4)
s
=
s
2
20 . A n
aqu
eous
s
oluti
on c
ontain
s a su
b-
sta
nce w
hich
yiel
ds
4
x
10 -
3
mo
l
litre
-
1
ion
of H 30 .
f Jog
2
is 0 .30
10 th
epH
o f
the solut
ion
is
:
{1} 2
.398
2) 1.5
3
) 3.0
4)
3.4
21.
S
OCI2
+ CH
3CO
OH
Cfia
COCI
+
H
CI
+
s
T
he re
actio
n
i
sen
doth
ermic.
A 10
de
gre
e cen
tigrad
e t
empe
rature
rise
w ill
cause
the
reacti
on ra
tio to :
1)
Decrea
se
2 )
B eco
m e exa
ctly ha
lf+
3
) Rem
ain un
chang
ed
4
)
B eco
m e ne
arly d
ouble
2
2 . An e
xamp
le of
a cl
osed
sys
tem is :
1)
H
ot liqu
id in
c
losed
bea
kerin equ
ilibriu
m
with
its
vapour
2) H ot liq
uid i
n
an
op
en b
eaker
3)
Hot li
quid
in a sea
led in s
ulated
beake
r
4)
N on
e
23
. If
H
2(g)
+ l2(g)
~ 2
HI (g);
Mi =
12.40
k
cal.
T he hea
t i
nform
ation o
f H
I fs :
1) 12
.4 kcal
2)
6 .
2
k
cal
(3
)- 6 .
2 kcal
(4
)- 12
.4 kcal
24. f
50
ml
of
A283
reacts
c
omplete ly
w
ith 2
00 ml o
fC2
i
na
close
d
ve
ssel
ac-
co
rding
to th
eeq
uatio
n ,
2A
2
8
3
(g
) + S
C 2(g) ~
3 C 3
~
+CA
4 (g ).
T
he c
ompo
sition
of the
mixtu
re of
ga
sd
I
s :
1)
10 m
l
C
z
25
i C ~
100 m
l
2)
25 ml C
z 75
ml
~ 2Sml
~
3) 75
ml Cz
75 ml C
3B2,
25
ml
C ~
4) 100
ml
Cz
50 ml
C3B2
.
SO
ml CA4
25. f
the
ato
mic num
ber of
an
elem
ent is
33
,
Jt
wiiJ
be
pJa
ced
in the pe
riodic
ta
ble
inth
e :
1) 7 th
group
2 )
5th gr
oup
3 ) 4 th
gro
up
4
) 1st g
roup
26. Th
e
vo
Jume
of 10
V ol
of H20
2 re
q
uited
to
l
ibera
te
5
00 m
l
02
a
t NTP
is :
l}
125 ml
{2 ) 1
00 ml
I 3) 2
5 ml
4) 50
ml
I 2
7
.
The ox
ide o
f
w
hich
m
etal Js
most
sta
-
ble t
o heat
:
{ l )
Ag
{
2 ) H
g
3
) K
4 ) A l
l o the
se
1
8.
A hydr
ide of
ni
trogen
wh
ich
is acidic
in
natur
e is :
{1)
N
3
H
{2) Nz
H
2
{3
) NzH
4) NH
3
29. W
hich
melts
inb
oiling
wate
r :
1)
Bell m
etal
2}
M on
el m et
al
3) W
ood s
metal
4)
Gum
metal
30 . N
itrica c
id
may b
e ke
pt
In
a
bottl
e
o
f :
1)
Sn
2 ) A
I
3 ) Pb
4 )
Ag
31
. W
hen Zn
react
s
with ve
ry dil
ute n it
ric
acid
it pr
oduce
s :
(l)Hz
3)
N
H ~ 3
2}N02
4 )
N O
32.
W
hich los
es weigh
t
on expo
sure
tothe
atmos
phere
:
1)
Anhy
d . AICI
3
2
) N
aOH
3 )
C
one
.
H2S
04
4 ) S a
turated
aq
ueous
so
lution
o
~
33 . Th
e re
actio
n of
chlo
rine wit
h
C
O In
t
he
prese
nce of
sunl
ight
giv
es
:
1)
H ~
~
{2 HO
C
3)
C0
2
Ct2
4 )
COCI2
34 . T
he ga
s us
ed
for
in
flatin
g the
ty r
es of
a
eropla
nes i
s :
1) Ar
2) H e
3
)Hz
4)
N
z
35 . d
- Bl
ockele
ment
s
are ar
range
d
in
.
. of
p
eriod
ic
ta
ble
:
1
) Six
series
2)
Four s
eries
3)
Thre
eseries
4 ) Tw
o seri
es.
36. Wh
ich o
n mix
ing g
ives
de
ep brow
n
colour:
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(1)NO+Oz
(3) N203 + 0:?
(2)
N20
+
z
(4)
None
o,tN.OH
l \ /
O i
3
COOH
7.CH E CH - - - X
Y.
y
Is
1)
CH30H
(3) CH
3
CH
2
0H
Which Is expected
to
react most
read
Ily wtth bromine :
1) CH3- CH
=
CH2
(2)
CH = H
(3) CH
2
=CH2
39. The structural
formula of
the com
pound
whlch yields ethylene
upon
reac
tion
wtth
zinc Is :
(1)
CHBr- CHBr (2
) CHBr2-
CHBr2
(3
) CH2Br - CH2Br (4 )
None
40.
Glycerol
on treatment with potassium
hydrogen sulphate
yields
(1)
Acraldehyde
(2 )
Acrylic acid
(3) Propane (4) Ethanol
l r e c t l ~ Q J to 60 co,..,.,_
of
two statement.
one
labelled
the
A
rtlon
(A)
and
the other
labeUed the
'ReMOn (R)'. Examine
these
.statements carefully and c edde 1/
( 1) If both assertion and reason are true statements and the reason
is
a correct explanation of
the assertion
(2) If both
assertion
and
reason
are
true statements
but
reason is not a correct explanation
of
the
assertion
(3)
If the assertion
is
true but the reason
is
a false statement
(4)
If
both
assertion and reason
are
false statements.
: Water is specially effective in Reason (R) : The force
of
ionic interactions de-
screening the electrostatic interactions between pends upon the dielectric constant (6) of the sol-
the dissolved ions. vent.
1)
(2) (3)
: The nearly tetrahedral arrange
ment
of
he orbitals about the oxygen atom allows
each water molecule to form hydrogen bonds
with
as
many
as
four neighbouring water mole
cules.
(1) (2) (3)
Assertion
A)
: Methanoic acid reduces mercu
ric chloride to mercurous chloride on heating
while
ethanoic
acid does not.
(1) (2) {3)
. Assertion A)
:
Phenol undergoes Kolbe's reac
tion whereas ethanol does
not
(1) 2 ) (3)
. Assertion (A) : The pressure of a gas
is
in
versely proportional to its volume at constant
temperature and n .
(1) (2) (3)
A.sertion
A) : The oxidation numbers are
artificial, they are useful as a 'book-keeping'
device of electrons in reactions.
4)
Reason R) : In ice each water molecule fonns
four hydrogen bonds
as
each molecule
is
fix
ed in
the space.
(4)
Reason R) : Methanoic acid
is
astronger acid
than ethanoic acid.
4}
Reason
(R) ;
Phenoxide ion
is more
basic
than
ethoxide ion.
(4)
Reason
(R) : The
gas volume
is
directly propor
tional to n at constant temperature and pres-
sure.
(4)
Reason (R) : The oxidati
on
numbers
do not
usually represent real charges on atoms, they
are simply conventions that indicate what the
maximum charge could possibly be
on
an
atom in a molecule .
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AIIMS
Anlyzer
1)
(2)
3)
58. ~ r t l o n
A)
:
The carboni acid is stronger
acid
than phenol.
1)
(2) (3)
59. Asertlon
A)
:
When aconcentrated solution
is diluted by adding more water, the number of
moles
of .solute in . the solution remains
un
changed.
(1) (2). (3)
60.
AIHrtlon
A) : 14Si
30
,
15
p3l
and
1 )5
32
are
a group of isotones.
1)
(2)
(3)
f f
(4) .
Reaon
R) :
The hybrid of bicarbonate ion
has
two
equivalent conbibutlng strUctures
while
hybrid of phenoxide ton does not contain
such equival mt contributing structures.
4)
Reuon
R) ;
Number of moles of a solute is
equal
to
the product of molarity and volume of
solution in litres.
(4)
Reason R)
:
lsotones are atoms .of different
ele
ments having different mass numbers and atomic
numbers but
same number
of neutrons in
their
nu
clei
4)
ANsWERs
WITH
HINTS 4 EXPLANATIONS
1.Ans. (2)
~ +
C- 2CO
2.
Ans. 4)
n/p> l.Sleads to unstable nucleus.
3. Ans. (4)
Stationary states.
4. Ans. (3)
Ra
is
most radioactive
ele.ment.
5. Ans. 2)
.Hybrid orbitals always
from
a
bond.
6. Ans.
2)
lnspite of three-polar bond, the lone
pair
of. electr9n on N atom decreases the
di
pole moment of NF3 than
NH3
.
7. Ans.
2) Due
to H-
bonding.
. . . 75
8.
Ans.
g atom of
A=
75
=
1;
.
g atoms of
B =
25 25;
:
Ratio
ofg atoms of
A B
=
1 : 1
9. Ans. (3) Meq.
=
100
x 0.5
=50
10. Ans.
(2)
~ +
+
6e -
2Cr
3
+
11.
Ans. 2) More
is F. >. more is the tendency
to
get
itself
oxidised, more
.iS
reducing nature.
12. Ans. (3)
4e
+ N
5
+ -
N
1
+
:
possible
product
is N20
13.
Ans. (3)
44 g ~ occupies
22.4
litre at
NTP.
14. Ans.
4) Catalyst does not make
the
reaction
r o ~ exothermic or endothermic .
15.
Ans. 2) Separation .of soluble impurities
from sol in followed
by dialysis; .
16.
Ans. 2)
An increase in
P
favours the reac
tion showing decrease
in
voiume.
17. Ans. 1)
is
~ o t
capable of
accepti.ng
proton.
18. Ans.
4)
A mixed salt is one
which
furnishes
two
types of cations or anions:
19. Ans.
(1)
5 = s
2
:. s = JS
for electrolytes
like
AgCl,
AgBr or AB
~
20. Ans. 1) rw1
=4 x w-
3
M
:
pH= - log 4
X 10-
3
=
: 3 ~ ,
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Part 3. BIOLOGY
l . The main
difference
betw
een chloro
phyll 'a '
and
b Is
1) Chlorophyll
'a '
has no Mg+ ion in centre
of molecule
2) Chlorophyll a is linear chain
compound
and
is brach
ed
chain
3) In chlorophyll '
a
there is CH3 group
whereas in 'b ' it is - CHO group
4) All of the ebo
ve
2. Loops of
hunpbrush
chromo.ome are
compoeed of
1)
Protein and RNA
2)
Double helix DNA only
3)
Double hel
ix
DNA, protein and
RNA
4) Single stranded DNA, protein
and
RNA
3 . .
n F
generation of
monohybrid
cro
the cause of 1 : 2 : 1
phenotypic
.ratio Is
1) Inhibition
2) Eplstatics
3) Incomplete dominance
4) Quantitative inheritance
4.
The
evi
dence tha
.
crossing
over
occurs
at four stranded stage
and
not at two
s
tranded
stage
of
the
chromosomes
,
comes om
1) Studies
of
me
iosis in maize
2) Studies on linkage
maps
of chromosomes
in Drosophila
3) 4 : 4 arrangement of ascospores in
eurospora
4) 2 : 2 : 2 : 2
arrangement of ascospores in
Neurospora
5. Why
mycoplasma
Is
pleuomorphlc
1)
D
ue
to the presence of sterol
2)
Due to absence of cell wall
3)
Due
to presence of three layered cell
memb
ran
e
4) None of these
6. Heterotroplc nutrition Is
found
In
(1) Pistia (2) Va//isnaria
3) Drosera 4) Opuntia
7.
Pteridophytes
are also
called
(1) Ctyptogames (2) Phanerogames
3) Amphibian of plant kingdom
4)
Vascular cryptogames
8 . Which one of the following normally
have cross pollination but are adapted
for
self
pollinat
i
on
1) Wheat 2) Sunflower
3) China rose 4) Mustard
9.
Numb...
of nuclei taking
part
In double
ferttlbation
Is
1) 5 2) 4 3) 3 4) 2
10. Secondary was fs not formed In
1) Companion cells 2) Collenchyma
3) Parenc
hyma
(4)
All
the above
11. Trachelds
of
anglos
pems
are
recog-
nised
by
th
e
pre
s
ence
of
1)
Scalaiforrn perforation plates
2) Scalaiforrn thickening
3) Bordered pits 4)
None
of
the
above
12. Whfch
of
the following is fertilizer
1)
Urea 2) Ammonium c
hl
oride
3) Calcium citrate 4) Calcium carbo
na
te
13. The conducting tissues of the planb
are
1)
Sclerenchyma
2) Phloem 3) Xylem
4) Xylem
and
phloem
both
14. Pollen
grain
s of some
of
the plants
minate on stigma soon but they bunt in
water
or
dllute sugar solution
1) Plasmolysis 2) Imbibition
3) Endosmosis {4) Exosmosis
15. Which of
the
following Is responsible
for rapid to of water om plant
1) Water
vapour
saturation deficit
2) Water vapour satura.tion of air
3) More available soil water to the plant
{4)
None
of
the above
16. Who Invented the enhancement
effect
on photosynthesis
1) Arnon 2) Emerson
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(3) inside
body
4) on either side of dorsal
aorta
35.
During
fertilization
, the
enzyme which
facllitatn
penetration
of
the
egg by
the
spermatozoan is:
1)
acetylcholineasterase
2) alkaline phosphatase
3)
acid
phosphatase
{4}
hyaluronidase
36. During regeneration,
the
following
takes place:
i) cell division
(ii)
dedifferentiation
iii)
cell movement (iv) tissue differentiation
The
correct
sequence is:
1) (ii), i) ,
iii)
, (iv) 2) i) ,
ii)
, (
iii)
, (iv)
3
(i), Iii),
ii)
, (iv) 4)
iii)
, (
ii)
, (i), (iv)
37.
Laws
of
inheritance were given
by:
1 ) Mendel 2) Darwin
3) Khorana 4) Lamarck
38
. Chromosomes
concerned
with sex de
termination are:
1)
Oxysomes
3) Autosomes
2) B-chromosomes
4) Heterosomes
39
.
Semiconservatlve DNA replication
was
ftnt demonsbated
.
1) Watson and Crick
2) Khorana 3) Meselson
and
Stahl
4) Taylor
40
. Which
chromosome
set
Is found
In
male grasshopper?
1) XX 2) YY 3) X 4) XY
Dlrectlo .. Q4l to 60 co ..l.t. of
two
tatemenu, one
labelled
the Aertfon (A)
and
the
other
labelled the 'Rea.on (R) . amine th e tatement. carefully and decide f
1)
lf
both
assertion
and
reason
are
true statements
and
the
reason is a correct explanation of
the
assertion
2
If both
assertion
and
reason
are
tru statements
but
reason
is
not
a correct explanation
of
the
assertion
3)
If the assertion is true but the reason is a false
statement
4)
If
both assertion and reason are false statements.
41. Assertion (A) : The chewing and lapping Reason
R)
: The
galeae
are much elongated
mouth parts consist of a l
ong tounge
which
is
and coiled, each forming a half tube, which
formed from the glossae of
the
labium. makes complete tube when both are locked to
42.
Assertion
A)
: Left-
handed
DNA
is
known as
B-ONA. .
.
43. Assertjon (A) : Translocations involve shifting,
not deleting
or
adding genetic material which can
cause chromosomal defects when gametes are
formed.
44
. Assertion (A) : They form mutualistic, comnien
salistic,
or parasitic relationships.
45. Assertion (A) :The sustaining surface for the
gliding in certain animals, is a fold
or
series
of
folds of he s1
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3
) D h
aka
(4 )
C olom
bo
7 W
hich
em
inen
t polit
ical
pers
onalit
y
play
ed
an
Im
porta
nt ro
le
In
the
draft in
g
of the
Indi
an Con
stitut
ion?
{1} B .
R. A m
bedka
r 2 )
r.R a
jen dra
P rasa
d
3
) S a
rdarPa
tel
(4 ) J
aw aha
rlalNe
hru
8 .
Wh
lc.h
cou
ntry
has
w
on
the
world
c
up
Foo
t ball
1998?
1) F
ra nce
2)
Arg e
ntina
3
) Bra
zil
4 )
Ita ly
9 .
The f
lnt as
tronau
t to
s
et
foot on the
m o
on wa
s
1) E
dwin
Aldrin
2 )
Alan
She
pherd
3 ) N
ie l Arm
stro ng
4 )
Yuri G
angari
n
1
0
Ma
nsoo
r
All
K
han
Is
well -
know
n In In
-
di
a
1
anou
tstandi
ng spo
rtsm an
2 ) an
U
rdu
noveli
st
3)a s
arod
player
(4 ) a
classic
al sing
er
11 .
The te
rms
a
e..nan
d Bulls
r
efer to
those
spec
ulato
rs who
believ
e tha
t
pric
es
of
shares
w i
ll
(
1) com
e dow
n
an
d
rem a
in con
stan t r
espec-
tively
(2)
go u p
and
rem ain constant resp ectively
(
3) g
o
up and
com
e
d
own
respect
iv ely
(4
) c om e
d
own and
go u
pre
sp ectiv
ely
1
2. T
he U
nited
Nat i
onaJ Da
y
Js
o
bserv
ed
an
nually
o
n
(
1) 14 th
No
ve
m
b
er
(2 )3 t
h O c
tober
(3
) 24 th
O ctob
er
(4 ) 6 th
Ju
ne
13
.
' M
arch
8
is c
elebr
ated
as
(1) W
orldH
ealth D
ay
(2 )
N ation
al Inte
gratio n
D ay
(3)
u
man
Ri
ghts
D ay
(4 )
Inte rna
tional
W om e
n
sDa
y
14
.
W
hich of th
e
fo l
low in
g Is the
tn
di
genou
sly
de
velop
ed
mult
i-barr
el
rocke
t
sy
stem of
the
J
ndJan
Anny
?
1
)Tri
shul
(2
) P inak
a
3)
Akash
4)
Prithvi
15
V l
layat
K
han
Is
asso
ciate
d
with
1
) R
udra V e
ena
(2 ) S
h eh n ai
3) Si
tar
(4 ) S
arod
1
6.
The
autho
r
o
f the
famo
us
nov
el , A
nan
dam
ath
ls
1)S u
rend ra
Nath
B aner
jee
2 ) K
esh av
Ch
andraSen
3
)
Subha
s Chan
dra
Bos
e
4 )
B an
kim
Chand
ra C hatt
erjee
17
W
hich
o
ne of
the
fol l
owing
etate
s
Juds
In the
prod
uct ion
of
C of
fee
In
Jn-
~ a
.
1)Kerala
2 ) Goa
3 ) K
am ata
ka
4 )
Tamil N
du
18.
'
Book
er Pr
ize is aw
arded
fo
rwhic
h of
the
fol low
ing f
ie lds?
(1)Sp
orts
(2 ) S
ocial S
erv ic e
s
(3) L
iteratu
re
(4
) No
n
e
o fthe
se
1
9. T
rlplt
akasls
a
sacr
ed
book
of
(
1 ) Hin
duism
(2)Si
kh ism
(3
) Budh
ism
(4 )Jai
nism
20
. The pre
sent decim
al
system
of
num
ber
s was
the
inve
ntion
of
{ 1} Rom
ans
{2 ) n
dians
(3
) Gre e
ks
(4 ) Eg
yptians
AN
SWE
RS
1.
4)
2 .2)
3.
1 ) 4 .2)
5
. {
2} 6
.
{2
} 7.{
1} 8 .{
1}
9.{3 }
10.
1 ) 1
1. 4
) 12.
3}
13.4
) 14
. 2)
15 . 3
) 16
.
4
) 1
7. 3
) 18.
3) 1
9. 3)
20 .
2
).