NEET Physics / AI question bank / NCERT Class 11 / Thermodynamics
Thermodynamics: NEET questions with solutions
NEET uses this chapter for the first law with correct signs, work in isothermal, adiabatic, isobaric and cyclic processes, C_p − C_v = R, the second-law statements and Carnot efficiency. Marks are lost on sign conventions in ΔQ = ΔU + ΔW, using °C in 1 − T₂/T₁, and treating heat or work as properties of a state.
Also called: laws of thermodynamics · heat engines · Carnot engine
Questions
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- Q1A gas in a cylinder absorbs 500 J of heat and, at the same time, pushes a piston outward, doing 200 J of work on the surroundings. The…
First law of thermodynamicsEasySingle correct
- Q2A Carnot engine works between a hot reservoir at 227 °C and a cold reservoir at 27 °C. Its efficiency is
Carnot engineEasySingle correct
- Q3An ideal gas expands slowly while kept in contact with a large reservoir at a fixed temperature. Assess the Assertion (A) about where the…
Quasi-static and isothermal processesEasyAssertion–Reason
- Q4Two moles of a rigid diatomic ideal gas are heated at constant pressure so that their temperature rises by 50 K. Take R = 8.31 J mol⁻¹ K⁻¹.…
Specific heat capacityMediumSingle correct
- Q5One mole of an ideal gas at 300 K expands isothermally and reversibly from 10 L to 20 L. Take R = 8.31 J mol⁻¹ K⁻¹ and ln 2 = 0.693. The…
Quasi-static and isothermal processesMediumSingle correct
- Q6A monatomic ideal gas at 300 K is compressed adiabatically and reversibly to one-eighth of its original volume. Its final temperature is
Adiabatic processMediumSingle correct
- Q7An ideal gas is taken once round a rectangular cycle on a P–V diagram (P on the vertical axis) in the clockwise direction. The pressure…
Isochoric, isobaric and cyclic processesMediumSingle correct
- Q8Which of the claims I to IV about the second law of thermodynamics, Carnot engines and the nature of heat are correct?
Second law of thermodynamicsMediumStatement based
- Q9Two moles of a monatomic ideal gas expand adiabatically and reversibly, and the temperature falls from 400 K to 300 K. Take R = 8.31 J mol⁻¹…
Adiabatic processHardSingle correct
- Q10A Carnot engine has an efficiency of 40% with its sink at 300 K. Keeping the sink temperature fixed, by how much must the source temperature…
Carnot engineHardSingle correct
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