Kinetic Theory of Gases (12th) MockTest (Physics) MHT CET 2021
Test Instructions:
- This Mock test contains 15 MCQ questions.
- Choice and sequence for attempting questions will be as per the convenience of the candidate.
- Read each question carefully.
- Determine the one correct answer out of the four available options given for each question.
- Each question awards you 1 point.
- You can end the test any time by clicking “quiz summary>finish quiz”.
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- You can re-attempt the exam as per your wish, yet scores of the first attempt will be recorded!
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Question 1 of 15
1. Question
The mean energy of a molecule of an ideal gas is
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Question 2 of 15
2. Question
An office room contains about 2000 moles of air. The change in the internal energy of this much air when it is called from 34℃ to 24ºC at a constant pressure of 1.0 atm is (Use ♈︎air = 1.4 and Universal gas constant = 8.314 J/mol K)
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Question 3 of 15
3. Question
The value of ♈︎ ( = C⍴/Cv) for hydrogen, helium and other ideal diatomic gas X (whose molecules are not rigid but have an additional vibrational mode), are respectively equal to
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Question 4 of 15
4. Question
A sphere at 600 K is losing heat due to radiation. At this temperature its rate of cooling is R. The rate of cooling of this sphere at 400 K is (temperature of surroundings is 200 K)
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Question 5 of 15
5. Question
A cylinder of fixed capacity 67.2 litres contains helium gas at STP. The amount of heat needed to rise the temperature of the gas in the cylinder by 20℃ is (R = 8.31 J mol-1 k-1)
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Question 6 of 15
6. Question
A solid cube and a solid sphere of the same material have equal surface area. Both are at the same temperature 120℃, then
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Question 7 of 15
7. Question
H2 , O2 , N2 and He are enclosed in identical containers under the similar conditions of pressure and temperature. The gases will have
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Question 8 of 15
8. Question
With same initial conditions, an ideal gas expands from volume V1 to V2 in three different ways the work done by gas is W1, if the process is isothermal, W2 if isobaric and W3 if adiabatic, then
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Question 9 of 15
9. Question
To what temperature should the hydrogen at 327ºC be cooled at constant pressure, so that the root mean square velocity of its molecules becomes half of its previous value?
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Question 10 of 15
10. Question
In the expression for Boyle’s laws , the product ‘PV’ has dimensions of
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Question 11 of 15
11. Question
For a gas R/ Cv =0.4, where ‘R’ is the universal gas constant and ‘Cv’ is molar specific heat at constant volume. The gas is made up of molecules which are
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Question 12 of 15
12. Question
Two spherical black bodies have radii ‘r1’ and ‘r2’. Their surface temperatures are ‘T1’ and ‘T2’ . If they radiate same power then r2/r1 is
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Question 13 of 15
13. Question
Heat energy is incident on the surface at the rate of 100 J/min. If coefficient of absorption is 0.8 and coefficient of reflection is 0.1 then heat energy transmitted by the surface in 5 minute is
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Question 14 of 15
14. Question
The r.m.s. speed of oxygen molecule in a gas is ‘u’. If the temperature is doubled and the molecules dissociate into two atoms, the r.m.s speed will be
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Question 15 of 15
15. Question
An iron nail changes its colour from red to orange red and then to bluish white, when heated strongly in flames. This change of colour can be explained on the basis of
