List of top Physics Questions on Thermodynamics asked in NEET (UG)

The equilibrium state of a thermodynamic system is described by:
A. Pressure
B. Total heat 
C. Temperature 
D. Volume 
E. Work done
Choose the answer from the options given below.
What is the correct expression for enthalpy?
A carnot engine has an efficiency of 50% when its source is at a temperature 327°C. The temperature of the sink is:
An ideal gas undergoes four different processes from the same initial state as shown in the figure below. Those processes are adiabatic, isothermal, isobaric and isochoric. The curve which represents the adiabatic process among 1, 2, 3 and 4 is:
A cylinder contains hydrogen gas at pressure of 249 kPa and temperature $27^\circ\,C$. Its density is :$(R = 8.3\,J\,mol^{-1}K^{-1}$)
Two cylinders $A$ and $B$ of equal capacity are connected to each other via a stop clock. A contains an ideal gas at standard temperature and pressure. $B$ is completely evacuated. The entire system is thermally insulated. The stop clock is suddenly opened. The process is:
In which of the following processes, heat is neither absorbed nor released by a system?
Which of the following processes is reversible?
An ideal gas heat engine operates in Carnot cycle between 227°C and 127°C. It absorbs 6 x 104 cal of heat at higher temperature. Amount of heat converted to work is:
The equation of state for 5g of oxygen at a pressure P and temperature T, when occupying a volume V, will be :-
One mole of an ideal gas at an initial temperature of T K does 6 R joules of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume is 35 , the final temperature of gas will be
The ratio  \((W/Q)\) for a carnot–engine is \(\frac 16\), Now the temperature of sink is reduced by  \(62 \ ºC\), then this ratio becomes twice, therefore the initial temperature of the sink and source are respectively: