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JEE Mains Previous Years Questions with Solutions

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1

AIEEE 2004

MCQ (Single Correct Answer)
As the temperature is raised from 20°C to 40°C, the average kinetic energy of neon atoms changes by a factor of which of the following?
A
1/2
B
2
C
$$313\over293$$
D
$$\sqrt{313\over293}$$

Explanation

$${{K.E\,\,of\,\,neon\,\,at\,\,{{40}^ \circ }C} \over {K.E\,\,of\,\,neon\,\,at\,\,{{20}^ \circ }C}}$$

$$ = {{{3 \over 2}K \times 313} \over {{3 \over 2}K \times 293}}$$

$$ = {{313} \over {293}}$$
2

AIEEE 2003

MCQ (Single Correct Answer)
According to the kinetic theory of gases, in an ideal gas, between two successive collisions of a gas molecule travels
A
in a wavy path
B
in a straight line path
C
with an accelerated velocity
D
in a circular path

Explanation

According to kinetic theory the gas molecules are in a state of constant rapid motion in all possible directions colloiding in a random manner with one another and with the walls of the container and between two successive collisions molecules travel in a straight line path but show haphazard motion due to collisions.
3

AIEEE 2002

MCQ (Single Correct Answer)
Kinetic theory of gases proves
A
only Boyle's law
B
only Charle's law
C
only Avogadro's law
D
All of these

Explanation

Kinetic theory of gases proves all the given gas laws.
4

AIEEE 2002

MCQ (Single Correct Answer)
Value of gas constant R is
A
0.082 litre atm
B
0.987 cal mol-1 K-1
C
8.3 J mol-1 K-1
D
83 erg mol-1 K-1

Explanation

Value of gas constant

$$\left( R \right) = 0.0821L\,atm\,{K^{ - 1}}\,mo{l^{ - 1}}$$

$$ = 8.314 \times {10^7}\,\,ergs\,{K^{ - 1}}\,mo{l^{ - 1}}$$

$$ = 8.314J{K^{ - 1}}\,mo{l^{ - 1}}$$

$$ = 1.987\,cal\,{K^{ - 1}}\,mo{l^{ - 1}}$$

Questions Asked from Gaseous State

On those following papers in MCQ (Single Correct Answer)
Number in Brackets after Paper Indicates No. of Questions
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JEE Main 2019 (Online) 12th January Morning Slot (1)
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JEE Main 2019 (Online) 9th January Morning Slot (1)
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JEE Main 2018 (Online) 16th April Morning Slot (1)
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JEE Main 2017 (Online) 9th April Morning Slot (1)
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JEE Main 2017 (Online) 8th April Morning Slot (1)
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JEE Main 2016 (Online) 10th April Morning Slot (1)
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JEE Main 2016 (Online) 9th April Morning Slot (1)
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JEE Main 2016 (Offline) (1)
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JEE Main 2014 (Offline) (1)
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JEE Main 2013 (Offline) (1)
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AIEEE 2012 (1)
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AIEEE 2011 (1)
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AIEEE 2010 (1)
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AIEEE 2007 (1)
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AIEEE 2005 (1)
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AIEEE 2004 (2)
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AIEEE 2003 (1)
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AIEEE 2002 (3)
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