e:iliyas mirza (mathematics wo › oldques › xi_g6.pdf05. a particle has an initial velocity of 4i...

...01...Class : XI/G6 1

Space for Rough Work

PHYSICS

funsZ'k1. Instructions regarding filling of OMR Sheet are

mentioned on the OMR Sheet Only.2. The duration of the exam is 2 Hours.3. The Question Booklet consists of 100 questions,

each of them is of 4 Marks. The maximum Marksare 400.

4. Subject wise division of 100 Questions are asfollows : Physics50, Chemistry50.

5. Candidates will be awarded 4 Marks for indicatedcorrect response of each question.

6. One mark will be deducted for incorrect responseof each question.

7. Space for rough work is also provided in theQuestion Booklet.

1.

2.3. 100 4

400

4. 100 50, 50.

5. 4

6. 1

7.

01. Two boats start from mid point of river in case (i) and inmid point of pond of still water in case (ii).If all velocity shown in figure are relative to water thenmark the correct option about time taken to reach thenearest bank.

��

��

A C

RiverFlow

Case (i) Case (ii)

Still water

dd

B D

v v

v v

(1) Boat A takes least time(2) Boat B takes maximum time(3) All the four boats A,B,C and D take same time(4) Time of reaching bank can not be compared.

01. (i) (ii)

��

��

A C

RiverFlow

Case (i) Case (ii)

Still water

dd

B D

v v

v v

(1) A (2) B (3) A,B,C D (4)

...01...Class : XI/G6 2


02. A shot is fired at an angle � to the horizontal such that it

strikes the hill while moving horizontally Find initial angle

of projection �.

� 37°

(1) tan � = 5

2(2) tan � =

8

3

(3) tan � = 2

3(4) None of these

03. A particle moves in x-y coordinate system such that its

position coordinates are gives as ĵtsin4îtsin2r ��

,

The path of the particle is:

(1) straight line (2) parabola

(3) circular (4) ellipse

04. Can an object maintain uniform velocity when its

acceleration is not zero?

(1) no, impossible

(2) yes, but only if the acceleration is in the direction of

the velocity

(3) yes, but only if the acceleration is opposite to the

direction of the velocity

(4) yes, if the acceleration is perpendicular to the

velocity.

02. �

�

� 37°

(1) tan � = 5

2(2) tan � =

8

3

(3) tan � = 2

3(4)

03. x-y

ĵtsin4îtsin2r ��

,

(1) (2)

(3) (4)

04.

(1)

(2)

(3)

(4)

...01...Class : XI/G6 3


05. A particle has an initial velocity of ˆ ˆ4i 4jm / s� and an

acceleration of ˆ0.4 i� m/s2 , at what time will its

speed be 5 m/s?

(1) 2.5 sec (2) 17.5 sec

(3) 27 sec (4) 8.5 sec

06. A particle is projected with a velocity u, at an angle

�, with the horizontal. At what time its vertical

component of velocity becomes half of its net speed

at the highest point?

(1) g2

u

(2) g2

u(sin� – cos�)

(3) g2

u(2 cos� – sin�)

(4) g2

u(2sin� – cos�)

07. If b,a��

and c�

are unit vectors such that

0cba��

�� , then the angle between a�

and b�

is

(1) �� (2) ��(3) 90° (4) ��

08. Sum of two unit vectors is a unit vector. What ismagnitude of their vector difference

(1) 2 (2) 3

(3) 2

1(4) 5

05. t = 0 ˆ ˆ4i 4jm / s�

ˆ0.4 i� m/s2 5 m/s

(1) 2.5 sec (2) 17.5 sec

(3) 27 sec (4) 8.5 sec

06. �� u

(1) g2

u

(2) g2

u(sin� – cos�)

(3) g2

u(2 cos� – sin�)

(4) g2

u(2sin� – cos�)

07. b,a��

c�

0cba��

�� a�

b�

(1) �� (2) ��

(3) 90° (4) ��

08.

(1) 2 (2) 3

(3) 2

1(4) 5

...01...Class : XI/G6 4


09. A plumber steps out of his truck, walks 60 m east and

35 m south and then takes an elevator, 12 m down to the

basement of a building where a bad leak is occurring.

Assume x axis is east ; y-axis is north and z-axis is up,

displacement of plumber is expressed conventionally as

(1) k̂12ĵ35î60 �� (2) k̂12ĵ35î60 ��(3) k̂12ĵ35î60 �� (4) k̂12ĵ35î60 ��

10. A force k̂ĵ2î5F ��

displaces a body from a point

of coordinate (1, 1, 1) to another point of coordinates

(2, 0, 3). Calculate the work done by the force.

(1) 2 (2) 3

(3) 4 (4) 5

11. The hour hand of a clock is 6 cm long. The magnitude of

the displacement of the tip of hour hand between

1:00 pm to 5:00 pm. is :

(1) 6 cm (2) 36 cm

(3) 12 cm (4) 33 cm

12. A particle moves along a straight line and its position as

function of time is given by x = t3 – 3t2 + 3t + 3 then

particle

(1) stops at t = 1s and reverses its direction of motion

(2) stops at t = 1s and continues further without change

of direction

(3) stops at t = 2s and reverses its direction of motion

(4) stops at t = 2s and continues further without change

of direction

09. 60 m 35 m

12 m

x- y-

z-

(1) k̂12ĵ35î60 �� (2) k̂12ĵ35î60 ��(3) k̂12ĵ35î60 �� (4) k̂12ĵ35î60 ��

10. k̂ĵ2î5F ��

(1, 1, 1) (2, 0, 3)

(1) 2 (2) 3

(3) 4 (4) 5

11. 6 cm 1:00 pm 5:00 pm

(1) 6 cm (2) 36 cm

(3) 12 cm (4) 33 cm

12.

x = t3 – 3t2 + 3t + 3

(1) t = 1s

(2) t = 1s

(3) t = 2s

(4) t = 2s

...01...Class : XI/G6 5


13. A body is released from the top of a tower of height h .It takes t sec to reach the ground. Where will be the ball

after time t

2 sec

(1) At h

2from the ground

(2) At h

4 from the ground

(3) Depends upon mass and volume of the body

(4) At 3h

4 from the ground

14. A ball hits a wall and rebounds with the same speed, as

diagramed below. The changes in the components of the

momentum of the ball are:

y

��

x

(1) �px > 0, �py > 0

(2) �px = 0, �py > 0

(3) �px < 0, �py > 0

(4) �px = 0, �py < 0

13. ht

t

2

(1)h

2

(2)h

4

(3)

(4)3h

4

14.

y

��

x

(1) �px > 0, �py > 0

(2) �px = 0, �py > 0

(3) �px < 0, �py > 0

(4) �px = 0, �py < 0

...01...Class : XI/G6 6


15. An air plane is observed to move from A to B from

ground, as shown in figure. The successive positions are

shown at regular time intervals during which airplane does

not change its orientation. Which of the following arrows

can not represent direction of blowing wind–

N

E

S

W A

B

(1) (2)

(3) (4) None of these

16. Figure shows four possible trajectories of a kicked

football. Ignoring air resistance, rank the curves

according to the initial horizontal velocity component the

highest first–

1 2 3 4x

y

O(1) 1, 2, 3, 4 (2) 1, 3, 2, 4

(3) 3, 4, 1, 2 (4) 4, 3, 2, 1

15. A B

N

E

S

W A

B

(1) (2)

(3) (4)

16.

1 2 3 4x

y

O

(1) 1, 2, 3, 4 (2) 1, 3, 2, 4

(3) 3, 4, 1, 2 (4) 4, 3, 2, 1

...01...Class : XI/G6 7


17. A frictionless wire AB is fixed on a sphere of radius R.

A very small spherical ball slips on this wire. The time

taken by this ball to slip from A to B is

B

A

O

R

�

C

(1)�cos

2

g

gR(2) g

gR�cos

.2

(3) gR

2 (4) �cosggR

18. The distance traveled by an object is given by

x = at + )ac(

bt2

� where t is time and a, b, c are constants.

The dimensions of b and c respectively are–

(1) [LT–2], [LT–1] (2) [L2T–3], [LT–1]

(3) [LT–1], [L2T–1] (4) [LT–1], [LT–2]

19. Which of the following is not one of the seven

fundamental SI units–

(1) Henry (2) Ampere

(3) Candela (4) Mole

20. The dimensions of G (Gravitational constant)are–

(1) [ML3T–2] (2) [M–1LT–2]

(3) [M–1L3T–2] (4) [M–1L3T–1 ]

17. R A B

A B

B

A

O

R

�

C

(1)�cos

2

g

gR(2) g

gR�cos

.2

(3) gR

2 (4) �cosggR

18. x = at + )ac(

bt2

�

t a, b, c b c

(1) [LT–2], [LT–1] (2) [L2T–3], [LT–1]

(3) [LT–1], [L2T–1] (4) [LT–1], [LT–2]

19. SI

(1) (2)

(3) (4)

20. G ( )

(1) [ML3T–2] (2) [M–1LT–2]

(3) [M–1L3T–2] (4) [M–1L3T–1 ]

...01...Class : XI/G6 8


21. A body starts from origin and moves along x axis such that

at any instant velocity is vt = 4t3 – 2t where t is in second

and vt is in ms–1. The acceleration of the particle when

it is 2 m from the origin is–

(1) 28 ms–2 (2) 22 ms–2

(3) 12 ms–2 (4) 10 ms–2

22. A body moves with velocity v = ( �n x) m/s where x is itsposition. The net force acting on body is zero at–

(1) x = 0 m (2) x = e2 m

(3) x = e m (4) x = 1 m

23. Force acting on a body of mass 1 kg is related to itsposition x as F = x3 – 3x N. It is at rest at x = 1. Itsvelocity at x = 3 can be–

(1) 4 m/s (2) 3 m/s

(3) 2 m/s (4) 5 m/s

24. Two vectors b&a��

are varying with time as�

= 3t � + 4t2 � & �

= (6t + 3) � + (7 sint) � . Find themagnitude of the rate of change of

� �a b. at

t = �/2 second–

(1) 46� + 9 (2) 44� + 9

(3) 40� + 9 (4) 38� + 9

25. A force of 40N is responsible for the motion of a body

governed by the equation s=2t+2t2 where s is in metres

and t in sec. What is the momentum of the body at

t = 2 second–

(1) 400 kgm/s (2) 200 kgm/s

(3) 300 kgm/s (4) 100 kgm/s

21. x

vt = 4t3 – 2t

t vt ms–1

2 m

(1) 28 ms–2 (2) 22 ms–2

(3) 12 ms–2 (4) 10 ms–2

22. v = ( �n x) m/s x

(1) x = 0 m (2) x = e2 m

(3) x = e m (4) x = 1 m

23.x F = x3 – 3x N x = 1

x = 3

(1) 4 m/s (2) 3 m/s

(3) 2 m/s (4) 5 m/s

24. ba��k;

�= 3t � + 4t2 �

� = (6t + 3) � + (7 sint) � ,

t = �/2 sec� �a b.

(1) 46� + 9 (2) 44� + 9

(3) 40� + 9 (4) 38� + 9

25. 40N

s=2t+2t2 s t t = 2

(1) 400 kgm/s (2) 200 kgm/s

(3) 300 kgm/s (4) 100 kgm/s

...01...Class : XI/G6 9


26. The co-ordinates of a moving particle at a time t, are given

by, x = 5 sin 10 t, y = 5 cos 10 t . The speed of the particle at

time t is–

(1) 25 (2) 50

(3) 10 (4) 50 227. A particle is thrown upwards from ground. It

experiences a constant resistance force which can

produce retardation 2 m/s2. The ratio of time of ascent

to the time of descent is– [g = 10 m/s2]

(1) 1 : 1 (2) 3

2

(3) 3

2(4)

2

3

28. The drawing shows velocity (v) versus time (t) graphs

for two cyclists moving along the same straight segment

of a highway from the same point. The second cyclist

starts moving at t = 3 min.At what time do the two

cyclists meet–

(1) 4 min (2) 6 min

(3) 8 min (4)12 min

26. t x = 5 sin

10 t, y = 5 cos 10 t t

(1) 25 (2) 50

(3) 10 (4) 50 227.

2 m/s2

[g = 10 m/s2]

(1) 1 : 1 (2) 3

2

(3) 3

2(4)

2

3

28.

(v) (t)

t = 3 min.

(1) 4 min (2) 6 min

(3) 8 min (4)12 min

...01...Class : XI/G6 10


29. A boat is able to move through still water at 20 m/s.

It makes a round trip to a town 3.0 km upstream. If

the river flows at 5 m/s, the time required for this

round trip is–

(1) 120 s (2) 150 s

(3) 200 s (4) 320 s

30. To man running at a speed of 5 m/sec,the rain drops

appear to be falling at an angle of 45° from the vertical.

If the rain drops are actually falling vertically

downwards, then velocity in m/sec is–

(1) 5 (2) 5 3

(3) 5 2 (4) 4

31. Initially car A is 10.5 m ahead of car B. Both start moving

at time t = 0 in the same direction along a straight line.

The velocity time graph of two cars is shown in figure.

The time when the car B will catch the car A, will be–

(1) t = 21 sec (2) t = 52 sec

(3) 20 sec (4) None

29. 20 m/s

3.0 km

5 m/s

(1) 120 s (2) 150 s

(3) 200 s (4) 320 s

30. 5 m/sec

45°

(1) 5 (2) 5 3

(3) 5 2 (4) 4

31. A, B 10.5 m t = 0

B, A

(1) t = 21 sec (2) t = 52 sec

(3) 20 sec (4)

...01...Class : XI/G6 11


32. A particle of mass 1 kg is acted upon by a force 'F' which

varies as shown in the figure. If initial velocity of the

particle is 10 ms–1, the maximum velocity attained by the

particle during the period is–

(1) 210 ms–1

(2) 110 ms–1

(3) 100 ms–1

(4) 90 ms–1

33. If the distance 's' travelled by a body in time 't' is given

by s = a

t + bt2 then the acceleration equals–

(1) 2

3

a

t + 2b (2)

22

s

t

(3) 2b – 2

3

a

t(4)

s

t 2

34. Momentum of a body moving in a straight line is

p = ( t2 + 2t + 1) kg m/s. Force acting on a body at

t = 2 second.

(1) 6 N (2) 8 N

(3) 4 N (4) 2 N

32. 1 kg 'F'

10 ms–1

(1) 210 ms–1

(2) 110 ms–1

(3) 100 ms–1

(4) 90 ms–1

33. 't'

s = a

t + bt2

(1) 2

3

a

t + 2b (2)

22

s

t

(3) 2b – 2

3

a

t(4)

s

t 2

34. p = ( t2 + 2t + 1) kg

m/s. t = 2

(1) 6 N (2) 8 N

(3) 4 N (4) 2 N

...01...Class : XI/G6 12


35. Which of the following pairs have same dimensions–

(1) work and angular momentum

(2) light year and wavelength

(3) stress and work

(4) energy and modulus of elasticity

36. A gas bubble oscillates with a time period T proportional

to Pa db Ec where P is pressure, d is the density and E is

the energy. The values of a, b & c are–

(1) a = 2

3 , b = �

3

1 , c = –

2

1

(2) a = � 6

5 , b =

3

1 , c =

2

1

(3) a = � 6

5, b =

2

1, c =

3

1

(4) a = 2

3, b = �

3

1, c =

2

1

35.

(1)

(2)

(3)

(4)

36. T

Pa db Ec P = d =

E = a, b, c

(1) a = 2

3 , b = �

3

1 , c = –

2

1

(2) a = � 6

5 , b =

3

1 , c =

2

1

(3) a = � 6

5, b =

2

1, c =

3

1

(4) a = 2

3, b = �

3

1, c =

2

1

...01...Class : XI/G6 13


37. Two similar cannon simultaneously fires two identical

cannon balls at target 1 and 2 as shown in the figure. If

the cannon balls have identical initial speeds, which of the

following statements is true–

(1) Target 2 is hit before target 1

(2) Target 1 is hit before target 2

(3) Both balls are hit at the same time

(4) information is insufficient

38. A stationary man observes that the rain strikes him at an

angle 60° to the horizontal. When he begins to move with

a velocity of 25 m/s then the drops appear to strike him

at an angle of 30° from horizontal. the velocity of the rain

drops is–

(1) 25 m/s

(2) 50 m/s

(3) 12.5 m/s

(4) 224 m/s

37. (cannon)

1 2

(1) 2 1

(2) 1 2

(3)

(4)

38. 60°

25 m/s

30°

(1) 25 m/s

(2) 50 m/s

(3) 12.5 m/s

(4) 224 m/s

...01...Class : XI/G6 14


39. A man travelling in car with a maximum constant speedof 20 m/s watches the friend start off at a distance100 m ahead on a motor cycle with constant acceleration‘a’. The maximum value of ‘a’ for which the man in thecar can reach his friend is–

av

100 m(1) 2 m/s2 (2) 1 m/s2

(3) 4 m/s2 (4) None of these

40. A particle travels along a curved path between two pointsP and Q. P and Q are not shown in figure. Displacement

of particle does not depend upon–

(1) The location of P and Q

(2) The length of line joining P and Q

(3) The direction of Q from P

(4) The choice of origin

41. The direction of three forces 1N, 2N and 3N acting at apoint are parallel to the sides of an equilateral triangle

taken in order. The magnitude of their resultant is–

(1) 3 N (2) N2

3

(3) N2

3(4) zero

39. 20 m/s 100 m

‘a’ ‘a’

av

100 m(1) 2 m/s2 (2) 1 m/s2

(3) 4 m/s2 (4)

40. P Q P

Q

(1) P Q

(2) P Q

(3) P Q

(4)

41. 1N, 2N 3N

(1) 3 N (2) N2

3

(3) N2

3(4)

...01...Class : XI/G6 15


42. The following set represents magnitudes of three vectors.

Which set of vectors can never give a zero vector on

addition–

(1) 3, 4, 5 (2) 2, 1, 3

(3) 12, 10, 23 (4) 13, 5, 12

43. A car is moving in east direction. It takes a right turn and

moves along south direction without change in its speed.

What is the direction of average acceleration of the car–

(1) North east (2) South east

(3) North west (4) South west

44. The magnitudes of two forces 21 F&F��

is 10 N and 8 N.

The angle between them is 120°. The magnitude of their

difference is–

(1) N244 (2) N84

(3) N164 (4) None of these

45. î2BA ��

and ĵ4BA ��

then angle between

BandA��

is–

(1) 127° (2) 143°

(3) 53° (4) 37°

46. The time dependence of a physical quantity p is given by

p p e t� �( )� where � is constant and t is time. The constant �.

(1) is dimensionless (2) has dimensions T–2

(3) has dimensions T2 (4) has dimensions of p

47. If y = 3x2 � 2x + 1, find the value of x for which dx

dy = 0.

(1) 1/3 (2) 1/4

(3) 1/2 (4) None of these

42.

(1) 3, 4, 5 (2) 2, 1, 3

(3) 12, 10, 23 (4) 13, 5, 12

43. 90°

(1) (2)

(3) (4)

44. 1F�

2F�

10 N 8 N

120°

(1) N244 (2) N84

(3) N164 (4)

45. î2BA ��

ĵ4BA ��

A�

B�

(1) 127° (2) 143°

(3) 53° (4) 37°

46. p

p p e t� �( )� � t �.

(1) (2) T–2

(3) T2 (4) p

47. y = 3x2 � 2x + 1, x dx

dy = 0

(1) 1/3 (2) 1/4

(3) 1/2 (4)

...01...Class : XI/G6 16


48. A man moves in an open field such that after moving 10

m in a straight line, he makes a sharp turn of 60° to his

left. Find the total displacement of the man just after 6

such turns–

(1) 10 m (2) 20 m

(3) 70 m (4) 30 m

49. Two vectors B&A��

have magnitudes 2 & 1

respectively. If the angle between B&A��

is 60°, then

which of the following vectors may be equal to B2

A �� .

A�

B�

(1) (2)

(3) (4)

50. A person pushes a box kept on a horizontal surface withforce of 100 N. In unit vector notation force F

� can be

expressed as–

45°

y

xF

(1) 100 )ĵî( � (2) 100 )ĵî( �

(3) 250 )ĵî( � (4) 250 )ĵî( �

48.

10m 60°

6

(1) 10 m (2) 20 m

(3) 70 m (4) 30 m

49. A�

B�

A�

B�

60°

B2

A ��

A�

B�

(1) (2)

(3) (4)

50. 100 N

45°

y

xF

(1) 100 )ĵî( � (2) 100 )ĵî( �

(3) 250 )ĵî( � (4) 250 )ĵî( �

...01...Class : XI/G6 17


51. A photon of 300 nm is absorbed by a gas and then emitstwo photons. One photon has a wavelength 496 nm then

the wavelength of second photon in nm :

(1) 759 (2) 859

(3) 959 (4) 659

52. If the total energy of an electron in hydrogen like atomin an excited state is –3.4 eV, then the

de-Broglie wavelength of the electron is :

(1) 4.3

150Å (2)

8.6150

Å

(3)4.3

150nm (4)

8.6150

nm

53. An electron, a proton and an alpha particle have kinetic

energies of 16E, 4E and E respectively. What is the

quantitative order of their de-Broglie wavelengths?

(1) �e > �

p = �� (2) �p = �� = �e

(3) �p > �

e > �� (4)��e > �� > �p

54. The radii of two of the first four Bohr’s orbits of the

hydrogen atom are in the ratio 1 : 4 The energy

difference between them may be :

(1) Either 12.09 eV or 10.2 eV




51. 300 nm

496 nm

nm

(1) 759 (2) 859

(3) 959 (4) 659

52. –3.4 eV

(1) 4.3

150Å (2)

8.6150

Å

(3)4.3

150nm (4)

8.6150

nm

53. �-

16E, 4E E

(1) �e > �

p = �� (2) �p = �� = �e

(3) �p > �

e > �� (4)��e > �� > �p

54.

1 : 4

(1) 12.09 eV 10.2 eV

(2) 2.55 eV 10.2 eV

(3) 13.6 eV 3.4 eV

(4) 3.4 eV 0.85 eV

CHEMISTRY

...01...Class : XI/G6 18


55. The potential energy of the electron present in the ground

state of Be3+ ion is represented by:

(1) re

0

2

�� (2) r

e

0��

(3) 20

2

r

e

�� (4) r

e

0

2

��

56. An ion Mna+ has the magnetic moment equal to 4.9 BM.

The value of a is : (atomic no. of Mn = 25)

(1) 3 (2) 4

(3) 2 (4) 5

57. �2zd orbital has :

(1) Two lobes along z-axis and a ring along xy-plane

(2) Two lobes along z-axis and two lobes along xy-plane

(3) Two lobes along z-axis and a ring along yz-plane

(4) Two lobes and a ring along z-axis

58. Photon having wavelength 310 nm is used to break the

bond of A2 molecule having bond energy

288 kJ mol–1 then % of energy of photon converted to

the K.E. is [hc = 12400 evÅ , 1 ev = 96 kJ/mol]

[hc = 12400 evÅ , 1 ev = 96 kJ/mol]

(1) 25 (2) 50

(3) 75 (4) 80

55. Be3+

(1) re

0

2

�� (2) r

e

0��

(3) 20

2

r

e

�� (4) r

e

0

2

��

56. Mna+ 4.9 BM

a : (Mn = 25)

(1) 3 (2) 4

(3) 2 (4) 5

57. �2zd :

(1) z- (lobes) xy-

(ring)

(2) z- (lobes) xy-

(lobes)

(3) z- (lobes) yz-

(ring)

(4) z- (ring) (lobes)

58. 310 nm A2

288 kJ mol–1

% (K.E.)

[hc = 12400 evÅ , 1 ev = 96 kJ/mol]

(1) 25 (2) 50

(3) 75 (4) 80

...01...Class : XI/G6 19


59. In Balmer series of lines of hydrogen spectrum, the first

line from the red end corresponds to which one of the

following inter-orbit jumps of the electron for Bohr orbits

in an atom of hydrogen ?

(1) 5 � 2 (2) 4 � 1

(3) 2 � 5 (4) 3 ��2

60. The uncertainty in position and velocity of the particle

are 0.1 nm and 5.27×10–27 ms–1 respectively then the

mass of the particle is : (h = 6.625 × 10–34Js)

(1) 200 g (2) 300 g

(3) 100 g (4) 10000 g

61. The density of air is 0.001293 g/ml at S.T.P. Its vapour

density will be :

(1) 10 (2) 15

(3) 1.44 (4) 14.4

62. If 10 g of Ag reacts with 1 g of sulphur , the amount of

Ag2S formed will be [Atomic weight of Ag = 108,

S = 32] ?

(1) 7.75 g (2) 0.775 g

(3) 11 g (4) 10 g

63. Which of the following statement is correct :

(1) 1 mole of electrons has 1.6 × 10–19 C of charge.

(2) 1 mole of electron weighs 0.54 mg

(3) 1 mole of electrons weighs 5.4 mg

(4) 1 mole of electrons weighs 0.54 kg

59.

(1) 5 � 2 (2) 4 � 1

(3) 2 � 5 (4) 3 ��2

60. 0.1 nm

5.27×10–24 ms–1

(h = 6.625 × 10–34Js)

(1) 200 g (2) 300 g

(3) 100 g (4) 10000 g

61. S.T.P. 0.001293

(1) 10 (2) 15

(3) 1.44 (4) 14.4

62. 10 g Ag, 1 g Ag2S

[Ag = 108 , S = 32] ?

(1) 7.75 g (2) 0.775 g

(3) 11 g (4) 10 g

63.

(1) 1 1.6 × 10–19 C

(2) 1 0.54 mg

(3) 1 5.4 mg

(4) 1 0.54 kg

...01...Class : XI/G6 20


64. When a mixture consisting of 10 moles of SO2 and 16

moles of O2 were passed over a catalyst, 8 mole of SO

3

were fomed at equilibrium. The number of moles of SO2

and O2 which did not enter into reaction were

(1) 2 , 12 (2) 12 , 2

(3) 3 , 10 (4) 10 , 3

65. A solution containing 0.1 mol of a metal chloride MClx

requires 500 ml of 0.8 M AgNO3 solution for complete

reaction MClx + xAgNO

3 � xAgCl + M(NO

3)

x. Then

the value of x is

(1) 1 (2) 2

(3) 4 (4) 3

66. The temperature at which molarity of pure water is equal

to its molality is :

(1) 273 K (2) 298 K

(3) 277 K (4) None

67. What is the molarity of H2SO

4 solution that has a density

1.84 gm/cc at 35ºC and contains 98% by weight-

(1) 4.18 M (2) 8.14 M

(3) 18.4 M (4) 18 M

68. 5.85 g of NaCl is dissolved in 1 L of pure water. The

number of ions in 1 mL of this solution is

(1) 6.02 × 1019 (2) 1.2 × 1022

(3) 1.2 × 1020 (4) 6.02 × 1020

64. SO2 10 O

2 16

SO3 8

SO2 O

2

(1) 2 , 12 (2) 12 , 2

(3) 3 , 10 (4) 10 , 3

65.

MClx 0.1 0.8 M AgNO

3 500

ml MClx + xAgNO

3 � xAgCl +

M(NO3)

x , x

(1) 1 (2) 2

(3) 4 (4) 3

66.

(1) 273 K (2) 298 K

(3) 277 K (4)

67. H2SO

4 35ºC

1.84 gm/cc 98%

(1) 4.18 M (2) 8.14 M

(3) 18.4 M (4) 18 M

68. 1 L 5.85 g NaCl 1

mL

(1) 6.02 × 1019 (2) 1.2 × 1022

(3) 1.2 × 1020 (4) 6.02 × 1020

...01...Class : XI/G6 21


69. How many gram ions of SO4–2 are present in 1 gram

molecule of K2SO4. Al2(SO4)3. 24H2O :

(1) 2 (2) 3

(3) 1 (4) 4

70. 100 gm impure CaCO3 on heating gives 5.6 lt. CO2 gas

at STP. Find the percentage of calcium in the lime stone

sample.

[At. wt. : Ca = 40 ; C = 12 ; O = 16]

(1) 10 (2) 20

(3) 1 (4) 30

71. 20 mL of H2O2 after acidification with dilute H2SO4

required 30 mL of 12

N KMnO4 for complete oxidation.

The strength of H2O2 solution is : [Molar mass of H2O2

= 34]

(1) 2 g/L (2) 4 g/L

(3) 8 g/L (4) 6 g/L

72. 10 mL of 1 N HCl is mixed with 20 mL of 1 M H2SO

4

and 30 mL 1 M NaOH. The resultant solution has :

(1) 20 meq of H+ ions

(2) 20 meq of OH–

(3) 0 meq of H+ or OH–

(4) 30 milli moles of H+

69. K2SO4. A 2(SO4)3. 24H2O 1

SO4–2

(1) 2 (2) 3

(3) 1 (4) 4

70. 100 CaCO3 5.6 L CO2 STP

CaCO3 Ca

[At. wt. : Ca = 40 ; C = 12 ; O = 16]

(1) 10 (2) 20

(3) 1 (4) 30

71. 20 mL H2O2 H2SO4

30 mL, 12

N KMnO4

H2O2 (H2O2

= 34)

(1) 2 g/L (2) 4 g/L

(3) 8 g/L (4) 6 g/L

72. 1 N HCl 10 mL; 1 M H2SO

4 20 mL 1 M

NaOH 30 mL

(1) H+ 20 meq

(2) OH– 20 meq

(3) H+ OH– 0 meq

(4) H+ 30

...01...Class : XI/G6 22


73. Which of the following statements are incorrect :

(1) 0.2 moles of KMnO4 will oxidise one mole of ferrous

ions to ferric ions in acidic medium.

(2)1.5 moles of KMnO4 will oxidise 1 mole of ferrous

oxalate in acidic medium.

(3) 0.6 moles of KMnO4 will oxidise 1 mole of ferrous

oxalate to one mole of ferric ion and carbon dioxide

in acidic medium.

(4) 1 mole of K2Cr

2O

7 will oxidise 2 moles of ferrous

oxalate to ferric ions and carbon dioxide in acidic

medium.

74. Equivalent weight of chlorine molecule in the equation is

3 Cl2 + 6 NaOH �� 5 NaCl + NaClO

3 + 3 H

2O

(1) 42.6 (2) 35.5

(3) 59.1 (4) 71

75. The valency factor of �2 when, (i) it is formed by the

reaction of potassium iodide and potassium iodate in acid

medium and (ii) when it reacts with hypo, are respectively

:

(1) 2, 2 (2) 35

, 2

(3) 53

, 2 (4) 5, 2

76. The number of moles of ferrous oxalate oxidised by onemole of KMnO

4 in acidic medium is :

(1) 25

(2) 52

(3) 53

(4) 35

73.

(1) KMnO4 0.2

(2) KMnO4 1.5 1

(3) KMnO4 0.6 1

(4) K2Cr

2O

7 1 2

74. :

3 Cl2 + 6 NaOH �� 5 NaCl + NaClO

3 + 3 H

2O

(1) 42.6 (2) 35.5

(3) 59.1 (4) 71

75. �2 (i)

(ii)

(1) 2, 2 (2) 35

, 2

(3) 53

, 2 (4) 5, 2

76. KMnO4

(1) 25

(2) 52

(3) 53

(4) 35

...01...Class : XI/G6 23


77. Consider the redox reaction 2S2O32– + �2 �� S4O6

2–

+ 2 �– :

(1) S2O32– gets reduced to S4O6

2–

(2) S4O62– gets oxidised to S2O3

2–

(3) �2 gets reduced to �–

(4) �2 gets oxidised to �–

78. The element with atomic number Z = 118 will be :

(1) noble gas

(2) transition metal

(3) alkali metal

(4) alkanline earth metal

79. M3+ has electronic configuration as [Ar] 3d10 4s2, hence

it lies in :

(1) s-block (2) p-block

(3) d-block (4) f-block

80. Which species has the maximum ionic radius:

(1) Na+ (2) O2–

(3) F– (4) Mg2+

81. In which case bond length is shortened ?

(1) When bond multiplicity increses between atoms.

(2) When increase difference in electronegativities of

atoms.

(3) In both cases.

(4) In none of the cases.

77. 2S2O32– + �2

�� S4O62– + 2 �– :

(1) S2O32– , S4O6

2–

(2) S4O62–, S2O3

2–

(3) �2 , �–

(4) �2 , �–

78. Z = 118 :

(1)

(2)

(3)

(4)

79. M3+ [Ar] 3d10 4s2

(1) s- (2) p-

(3) d- (4) f-

80.

(1) Na+ (2) O2–

(3) F– (4) Mg2+

81.

(1)

(2)

(3)

(4)

...01...Class : XI/G6 24


82. Ionisation potential of Na would be numerically the same

as :

(1) electron affinity of Na+

(2) electronegativity of Na+

(3) electron affinity of He

(4) ionisation potential of Mg

83. Higher values of ionisation energies of the 5d-transition

elements are consistent with the :

(1) relative smaller effective nuclear charge

(2) relative smaller size of their atoms

(3) relative smaller penetration

(4) all are correct

84. Following are the values of the Electron gain enthalpy

(in kJ mol–1) of the formation of O– and O2– from O :

(1) –142, – 744 (2) –142, 744

(3) 142, 744 (4) –142, – 142

85. Which of the following compunds does not contain–1

formal charge on any of O atom :

(1) O3 (2) H3PO4

(3) HNO3 (4) N2O5

82. Na

(1) Na+

(2) Na+

(3) He

(4) Mg

83. 5d-

(1)

(2)

(3)

(4)

84. O O – O2–

(kJ mol–1 )

(1) –142, – 744 (2) –142, 744

(3) 142, 744 (4) –142, – 142

85. O –1

(formal) :

(1) O3 (2) H3PO4

(3) HNO3 (4) N2O5

...01...Class : XI/G6 25


86. Which of the following compounds will have the largest

lattice energy ?

(1) Al2O

3(2) CaO

(3) LiBr (4) MgBr2

87. CuI2 is unstable even at ordinary temperature because:

(1) the Cu2+ ion with a comparatively small radius has a

strong polarising power.

(2) the Cu2+ ion with a 17 electron outer shell has weak

polarising power.

(3) the I– ion with a larger radius has a high polarisability.

(4) both (1) and (3)

88. Which of the statements is correct about SO2 ?

(1) two �, two ��and no lone pair of electrons around

central atom

(2) two � and one��around central atom

(3) two �, two � and one lone pair of electron around

centeral atom

(4) none of these

89. The ion which is not tetrahedral in shape is :

(1) BF4– (2) NH

4+

(3) XeO4

(4) ICl4–

90. The ONO angle is maximum in :

(1) HNO3

(2) NO2+

(3) HNO2

(4) NO2

86.

(1) Al2O

3(2) CaO

(3) LiBr (4) MgBr2

87. CuI2

(1) Cu2+

(2) Cu2+, 17

(3) I–

(4) (1) (3)

88. SO2

(1) � ��

(2) � 1 �

(3) �, �

(4)

89.

(1) BF4– (2) NH

4+

(3) XeO4

(4) ICl4–

90. ONO

(1) HNO3

(2) NO2+

(3) HNO2

(4) NO2

...01...Class : XI/G6 26


91. In XeF2(g)

, XeF4(g)

and XeF6(g)

the number of lone pairs

on Xe respectively are :

(1) 2, 3, 1 (2) 1, 2, 3

(3) 4, 1, 2 (4) 3, 2, 1

92. The structure of F2SeO is analogous to :

(1) SO3

(2) ClO–3

(3) XeO3

(4) (2) and (3) both

93. Which of the following statement is true for O2F

2– ?

(1) The electrons are located at the corners of a trigonal

bipyramidal but one of the equatorial pairs is

unshared.

(2) It has sp3d hybridisation and is T–shaped.

(3) Its structure is analogous to SF4.

(4) (1) and (3) both

94. In which of the following compounds B atoms are in

sp2 and sp3 hybridisation states ?

(1) Borax (2) Diborane

(3) Borazole (4) All

91. XeF2(g)

, XeF4(g)

XeF6(g)

Xe

(1) 2, 3, 1 (2) 1, 2, 3

(3) 4, 1, 2 (4) 3, 2, 1

92. F2SeO

(1) SO3

(2) ClO–3

(3) XeO3

(4) (2) (3)

93. O2F

2–

(1)

(2) sp3d T–

(3) SF4

(4) (1) (3)

94. B sp2 sp3

(1) (2)

(3) (4)

...01...Class : XI/G6 27


95. Which of the following is a wrong order with respect to

the property mentioned against each :

(1) NO¯ > NO > NO + –bond length

(2) H2 > H

2+ > He

2+ –bond energy

(3) O22– > O

2 > O

22+ – magnetic moment

(4) NO2+ > NO

2 > NO

2¯ –bond angle

96. Which reaction involves a change in the electron–pair

geometry for the under lined element ?

(1) BF3 + F– �� BF

4–

(2) NH3 + H+ �� NH

4+

(3) 2 SO2 + O

2 �� 2 SO

3

(4) H2O + H+ �� H

3O+

97. Which one (s) of the following structures cannot represent

resonance forms for N2O

(diamagnetic)?

(A) (B)

(C) (D)

(E)

(1) A and C (2) C , E and D

(3) D and E (4) C and D.

95.

(1) NO¯ > NO > NO + –

(2) H2 > H

2+ > He

2+ –

(3) O22– > O

2 > O

22+ –

(4) NO2+ > NO

2 > NO

2¯ –

96.

(1) BF3 + F– �� BF

4–

(2) NH3 + H+ �� NH

4+

(3) 2 SO2 + O

2 �� 2 SO

3

(4) H2O + H+ �� H

3O+

97. N2O

( )

(A) (B)

(C) (D)

(E)

(1) A C (2) C , E D

(3) D E (4) C D.

...01...Class : XI/G6 28


98. Which of the following statements are correct ?

(I) structure is not allowed because octet

around 'O' can not be expanded.

(II) H2O

2 is ionic compound

(III) In B2 molecule, the highest occupied molecular

orbital is � molecular orbital.

(IV) The lp–bp repulsion is stronger than bp–bp repulsion.

(1) (I) and (III) (2) (II) and (III)

(3) (I) and (IV) (4) (III) and (IV)

99. Among the following compounds, the correct order of

the polarity of the bonds is :

SbH3 , AsH

3 , PH

3 , NH

3 .

(1) SbH3 < AsH

3 < PH

3 < NH

3

(2) AsH3 < SbH

3 = PH

3 < NH

3

(3) PH3 < AsH

3 < SbH

3 < NH

3

(4) AsH3 < PH

3 < SbH

3 < NH

3

100. The high oxidising power of fluorine is due to :

(1) High electron affinity

(2) High ionisation energy

(3) Both (1) and (2)

(4) None of these

98.

(I) 'O'

(II) H2O

2

(III) B2 �

(IV) lp–bp bp–bp

(1) (I) (III) (2) (II) (III)

(3) (I) (IV) (4) (III) (IV)

99.

SbH3 , AsH

3 , PH

3 , NH

3

(1) SbH3 < AsH

3 < PH

3 < NH

3

(2) AsH3 < SbH

3 = PH

3 < NH

3

(3) PH3 < AsH

3 < SbH

3 < NH

3

(4) AsH3 < PH

3 < SbH

3 < NH

3

100.

(1)

(2)

(3) (1) (2)

(4)

e:iliyas mirza (mathematics wo › oldques › xi_g6.pdf05. a particle has an initial velocity of 4i...

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