JEE Questions for Chemistry Thermodynamics Quiz 11 - MCQExams.com

The decreasing order of calorific values is
  • C2H2 > C4H10 > C3H8 > C2H4
  • C4H10 > C3H8 > C2H4 > C2H2
  • C2H4 > C3H8 > C4H10 >C2H2
  • C3H8 > C2H4 > C4H10 >C2H2
If ΔHf (X), ΔHf (Y) ΔHf (R) and ΔHf (S) denote the enthalpies of formation of X, Y, R and S respectively the enthalpy of the reaction X + Y → R + S is given by
  • ΔHf (X) + ΔHf (Y)
  • ΔHf (R) + ΔHf (S)
  • ΔHf (X) + ΔHf (Y) ‒ ΔHf (R) ‒ ΔHf (S)
  • ΔHf (S)+ ΔHf (R) ‒ ΔHf (X) ‒ ΔHf (Y)
Match list I with List II and select the correct answer using the codes given below the lists:
Chemistry-Thermodynamics-8979.png
  • A = 5, B = 1, C = 2, D = 4
  • A = 5, B = 3, C = 2, D = 4
  • A = 3, B = 5, C = 2, D = 1
  • A = 5, B = 3, C = 2, D = 1
The process, in which no heat enters or leaves the system, is termed as
  • Isochoric
  • Isobaric
  • Isothermal
  • Adiabatic
Out of boiling point (I), entropy (II), pH (III) and e.m.f. of a cell (IV), intensive properties are –
  • I, II
  • I, II, III
  • I, III, IV
  • All the above
If for a given substance melting point is TB and freezing point is TA, then correct variation shown by graph between entropy change and temperature is

  • Chemistry-Thermodynamics-8981.png
  • 2)
    Chemistry-Thermodynamics-8982.png

  • Chemistry-Thermodynamics-8983.png

  • Chemistry-Thermodynamics-8984.png
1 mole of NH3 gas at 27° C is expanded adiabatic condition to make volume 8 times (γ = 1.33). Final temperature and work done respectively are –
  • 150 K, 900 cal
  • 150 K, 400 cal
  • 250 K, 1000 cal
  • 200 K, 800 cal
0:0:1


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