solved paper 2000

8/11/2019 Solved Paper 2000

1/23

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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2/23

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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3/23


4/23

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


5/23

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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6/23

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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7/23

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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8/23

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


9/23


10/23

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

www.examrace.com


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:

www.examrace.com


12/23

(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 .

www.examrace.com


13/23


14/23

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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15/23


16/23


17/23

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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19/23

(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

).

solved paper 2000

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