JEE Mains 2009

JEE Mains exam papers

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Chapter 27: JEE Mains 2019

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Chapter 29: JEE Mains 2017

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Chapter 36: JEE Mains 2010

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Chapter 37: JEE Mains 2009

86 questions

Chemistry Mathematics Physics

Chapter 38: JEE Mains 2008

156 questions

Chapter 39: JEE Mains 2007

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Chapter 40: JEE Mains 2006

176 questions

Chapter 41: JEE Mains 2005

216 questions

Chapter 42: JEE Mains 2004

194 questions

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Chapter 44: JEE Mains 2002

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Chapter 45: JEE Mains 2001

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Chapter 46: JEE Mains 2000

182 questions

JEE Mains 2009

Topic List

questions: 86

Verified solutions and explanations

Verified

Easy (13)Medium (49)Hard (24)

Views: 5,502

Which of the following has an optical isomer?

$[Co (NH_{3})_{3} Cl]^{+}$
$[Co (en) (NH_{3})_{2}]^{2 +}$
$[Co (H_{2} O)_{4} (en)]^{3 +}$
$[Co (en)_{2} (NH_{3})_{2}]^{3 +}$

Topic:

Organic Chemistry-Some Basic Principles and Techniques

Exam:

JEE Mains 2009

View 6 solutions

Views: 5,849

Copper crystallises in fcc with a unit cell length of

361 pm

. What is the radius of copper atom?

$108 pm$
$127 pm$
$157 pm$
$181 pm$

Topic:

The Solid State

Exam:

JEE Mains 2009

View 6 solutions

Views: 5,558

Using MO theory, predict which of the following species has the shortest bond length?

$O_{2}^{2 +}$
$O_{2}^{+}$
$O_{2}^{-}$
$O_{2}^{2 -}$

Topic:

Chemical Bonding and Molecular Structure

Exam:

JEE Mains 2009

View solution

Views: 6,448

The height at which the acceleration due to gravity becomes

\frac{g}{9}

g

is the acceleration due to gravity on the surface of the earth) in terms of

R

, the radius of the earth is
(a)

2 R

\frac{R}{3}

\frac{R}{2}

2 R

Topic:

Gravitation

Exam:

JEE Mains 2009

View 3 solutions

Views: 5,248

Two wires are made of the same material and have the same volume. However, wire 1 has cross-sectional area

A

and wire 2 has cross-sectional area

3 A

. If the length of wire 1 increases by

Δ x

on applying force

F

, how much force is needed to stretch wire 2 by the same amount?
(a)

F

4 F

6 F

9 F

Topic:

Mechanical Properties of Solids

Exam:

JEE Mains 2009

View 4 solutions

Views: 5,361

Assume the gas to be ideal, the work done on the gas in taking it from

A

B

200 R

300 R

400 R

500 R

Topic:

Thermodynamics

Exam:

JEE Mains 2009

View solution

Views: 5,655

The work done on the gas in taking it from

D

A

is (see above figure)
(a)

- 414 R

+ 414 R

- 690 R

+ 690 R

Topic:

Thermodynamics

Exam:

JEE Mains 2009

View 5 solutions

Views: 5,690

The net work on the gas in the cycle

A BC D A

is (see above figure)] (a) zero (b)

276 R

1076 R

1904 R

Topic:

Thermodynamics

Exam:

JEE Mains 2009

View solution

Views: 6,119

One kg of a diatomic gas is at a pressure of

8 \times 1 0^{4} Nm^{- 2}

. The density of the gas is

4 kgm^{- 3}

. What is the energy of the gas due to its thermal motion?
(a)

3 \times 1 0^{4} J

5 \times 1 0^{4} J

6 \times 1 0^{4} J

7 \times 1 0^{4} J

Topic:

Kinetic Theory

Exam:

JEE Mains 2009

View solution

Question 10

Views: 5,225

x, v

a

denote the displacement, the velocity and the acceleration of a particle executing simple harmonic motion of time period

T

, then which of the following does not change with time?

$a^{2} T^{2} + 4 π^{2} v^{2}$
$\frac{a T}{x}$
$a T + 2 π v$
$\frac{a T}{v}$

Topic:

Oscillations

Exam:

JEE Mains 2009

View 4 solutions

Question 11

Views: 5,502

A motor cycle starts from rest and accelerates along a straight path at

2 ms^{- 2}

. At the starting point of the motor cycle, there is a stationary electric siren. How far has the motor cycle gone when the driver hears the frequency of the siren at

94%

of its value when the motor cycle was at rest? (Speed of sound

= 330 ms^{- 1}

49 m

98 m

147 m

196 m

Topic:

Waves

Exam:

JEE Mains 2009

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Question 12

Views: 5,757

Three sound waves of equal amplitudes have frequencies

(v - 1), v, (v + 1)

. They superpose to give beat. The number of beats produced per second will be
(a) 4
(b) 3
(c) 2
(d) 1

Topic:

Waves

Exam:

JEE Mains 2009

View 17 solutions

Question 13

Views: 5,369

The question contains Statement I and Statement II. Of the four choices given after the statements, choose the one that best describes the two statements.
Statement I For a charged particle moving from point

P

Q

, the net work done by an electrostatic field on the particle is independent of the path connecting point

P

Q

.
Statement II The net work done by a conservative force on an object moving along a closed loop is zero.

Statement I is true, Statement II is false
Statement I is true, Statement II is true; Statement II is not the correct explanation of Statement I
Statement I is true, Statement II is true; Statement II is the correct explanation of Statement I
Statement I is false, Statement II is true

Topic:

Electric Charges and Fields

Exam:

JEE Mains 2009

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Question 14

Views: 5,175

P

Q

are maintained at the potentials of

10 V

- 4 V

, respectively. The work done in moving 100 electrons from

P

Q

- 19 \times 1 0^{- 17} J

9.60 \times 1 0^{- 17} J

- 2.24 \times 1 0^{- 16} J

2.24 \times 1 0^{- 16} J

Topic:

Electric Charges and Fields

Exam:

JEE Mains 2009

View 4 solutions

Question 15

Views: 5,901

This question contains Statement I and Statement II. Of the four choices given after the statements, choose the one that best describes the two statements.
Statement I The temperature dependence of resistance is usually given as

R = R_{0} (1 + α Δ t)

. The resistance of a wire changes from

100Ω

150Ω

when its temperature is increased from

2 7^{\circ} C

22 7^{\circ} C

. This implies that

α = 2.5 \times 1 0^{- 3} /^{\circ} C

R = R_{i} (1 + α Δ T)

is valid only when the change in the temperature

Δ T

Δ R = (R - R_{0}) ≪ R_{0}

.
(a) Statement I is true, Statement II is false
(b) Statement I is true, Statement II is true; Statement II is the correct explanation of Statement I
(c) Statement I is true, Statement II is true; Statement II is not the correct explanation of Statement I
(d) Statement I is false, Statement II is true

Topic:

Thermal properties of Matter

Exam:

JEE Mains 2009

View 2 solutions

Question 16

Views: 5,492

A mixture of light, consisting of wavelength

590 nm

and an unknown wavelength, illuminates Young's double slit and gives rise to two overlapping interference patterns on the screen. The central maximum of both lights coincides. Further, it is observed that the third bright fringe of known light coincides with the 4th bright fringe of unknown light. From this data, the wavelength of the unknown light is

$393.4 nm$
$885.0 nm$
$442.5 nm$
$776.8 nm$

Topic:

Ray Optics and Optical Instruments

Exam:

JEE Mains 2009

View 2 solutions

Question 17

Views: 6,146

The surface a metal is illuminated with the light of

400 nm

. The kinetic energy of the ejected photoelectrons was found to be

1.68 eV

. The work function of the metal is

(h c = 1240 eV - nm)

3.09 eV

1.42 eV

151 eV

1.68 eV

Topic:

Dual Nature of Radiation and Matter

Exam:

JEE Mains 2009

View 2 solutions

Question 18

Views: 5,214

The transition from the state

n = 4

n = 3

in a hydrogen like atom results in ultraviolet radiation. Infrared radition will be obtained in the transition from
(a)

2 \to 1

3 \to 2

4 \to 2

5 \to 4

Topic:

Atoms

Exam:

JEE Mains 2009

View 8 solutions

Question 19

Views: 5,964

In an experiment, the angles are required to be measured using an instrument. 29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale. If the smallest division of the main scale is half a degree

(= 0. 5^{\circ})

, then the least count of the instrument is
(a) one minute
(b) half minute
(c) one degree
(d) half degree

Topic:

Some Basic Concepts of Chemistry

Exam:

JEE Mains 2009

View 6 solutions

Question 20

Views: 5,458

A particle has an initial velocity

3 i + 4 j

and an acceleration of

0.4 i + 0.3 j

. Its speed after

10 s

is
(a) 10 units
(b)

72

units
(c) 7 units
(d)

8.5

Topic:

Physical World

Exam:

JEE Mains 2009

View 6 solutions

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