First law, Thermodynamic Equilibrium - Free MCQ Practice Test with solutions,
MCQ Practice Test & Solutions: Test: First law, Thermodynamic Equilibrium (15 Questions)
You can prepare effectively for JEE Chemistry for JEE Main & Advanced with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: First law, Thermodynamic Equilibrium". These 15 questions have been designed by the experts with the latest curriculum of JEE 2026, to help you master the concept.
Test Highlights:
- - Format: Multiple Choice Questions (MCQ)
- - Duration: 20 minutes
- - Number of Questions: 15
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A gas expands adiabatically at constant pressure such that 
. The value of 
of the gas will be :
. The value of of the gas will be :Detailed Solution: Question 1
constant
What is the value of change in internal energy at 1 atm in the process?
Given : 
at 
Given :
at Detailed Solution: Question 2
An ideal gas expands against a constant external pressure of 2.0 atmosphere from 20 litre to 40 litre and absorbs 10 kJ of heat from surrounding. What is the change in internal energy of the system? (given : 1 atm-litre = 101.3 J)
Detailed Solution: Question 3
The pressure-volume diagram shows six curved paths that can be followed by the gas (connected by vertical paths). Which two of them should be part of a closed cycle if the net work done by the gas is to be its maximum positive value?
Detailed Solution: Question 4
On P − V coordinates, the slope of an isothermal curve of a gas at a pressure P = 1MPa and volume V = 0.0025 m3 is equal to −400MPa/m3. If Cp/Cv = 1.4, the slope of the adiabatic curve passing through this point is :
Detailed Solution: Question 5
For an ideal gas four processes are marked as 1 2,3 and 4 on 
diagram as shown in figure. The amount of heat supplied to the gas in the process 
and 4 are 
and 
respectively, then correct order of heat supplied to the gas is 
is process- 
is process- 
is adiabatic process-3 and 
is process-4]
diagram as shown in figure. The amount of heat supplied to the gas in the process and 4 are and respectively, then correct order of heat supplied to the gas is is process- is process- is adiabatic process-3 and is process-4]Detailed Solution: Question 6
Which one of the following is applicable for an adiabatic expansion of an ideal gas?
Detailed Solution: Question 7
A system changes from the state 
to 
) as shown in the figure. What is the work done by the system?
to ) as shown in the figure. What is the work done by the system?Detailed Solution: Question 8
Joule
If 2.5 moles of an ideal gas at a certain temperature are allowed to expand isothermally and reversibly from an initial volume of 
to 
, the work done by the gas is −16.5 kJ.
The temperature (in K) of the gas is (Round off to the nearest value)
to , the work done by the gas is −16.5 kJ.The temperature (in K) of the gas is (Round off to the nearest value)
Detailed Solution: Question 9
An ideal gas is subjected to cyclic process involving four thermodynamic states, the amounts of heat (Q) and work (W) involved in each of these states 
The ratio of the net work done by the gas to the total heat absorbed by the gas is 
. The values of 
and 
respectively are
The ratio of the net work done by the gas to the total heat absorbed by the gas is
. The values of and respectively areDetailed Solution: Question 10
Now, 
For a monoatomic gas, the value of the ratio of 
and 
is
and isDetailed Solution: Question 11
If 
is the change in enthalpy and 
the change in internal energy accompanying a gaseous reaction, then
is the change in enthalpy and the change in internal energy accompanying a gaseous reaction, thenDetailed Solution: Question 12
An ideal gas expands adiabatically against vaccum. Which of the following is correct for the given process?
Detailed Solution: Question 13
When the state of a gas adiabatically changed from an equilibrium state A to another equilibrium state B an amount of work done on the stystem is 
. If the gas is taken from state 
to 
via process in which the net heat absorbed by the system is 
, then the net work done by the system is 
. If the gas is taken from state to via process in which the net heat absorbed by the system is , then the net work done by the system is Detailed Solution: Question 14
law of thermodynamics, 
The ratio γ = Cp, m/CV, m for a diatomic gaseous molecules is
Detailed Solution: Question 15
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