27 JEE Main 2021 Thermodynamics (C) previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2021 previous-year questions from the Thermodynamics (C) chapter of Chemistry. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Thermodynamics (C) chapter hub.
At 298 . 2   K the relationship between enthalpy of bond dissociation (in kJ   mol - 1 ) for hydrogen E H and…
For a given chemical reaction A → B at 300   K the free energy change is - 49 . 4   kJ   mol - 1 a…
A system does 200   J of work and at the same time absorbs 150   J of heat. The magnitude of the change in in…
Five moles of an ideal gas at 293   K is expanded isothermally from an initial pressure of 2 . 1   MPa to 1 .…
The Born-Haber cycle for KCl is evaluated with the following data: Δ f H Θ  for  KCl = − 436.…
For the reaction C 2 H 6 → C 2 H 4 + H 2 the reaction enthalpy ∆ r H   in kJmol - 1 is (Round off to t…
The gas phase reaction 2   A g ⇌ A 2 g at 400   K has Δ G o = + 25 . 2   kJ   mol - 1 .…
The reaction of cyanamide, NH 2 CN s with oxygen was run in a bomb calorimeter and ΔU was found to be - 742 . 24 &…
The ionization enthalpy of Na + formation from Na g is 495 . 8   kJ   mol - 1 , while the electron gain entha…
The number of f electrons in the ground state electronic configuration of Np ( Z = 93 ) is ______ .(Integer answer)
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