Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Thermodynamics question

2022 · 27 Jun · Shift 1 · Q3
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /JEE Main
  3. /Chemistry
  4. /Thermodynamics
  5. /2022 · 27 Jun · Shift 1 · Q3

Thermodynamics question

2022 · 27 Jun · Shift 1 · Q3

JEE MainChemistryThermodynamicsMCQ+4 / −1

Match List-I with List-II.

List - I List - II
(A) Spontaneous process (I) ΔH<0\Delta H \lt 0ΔH<0
(B) Process with ΔP=0\Delta P = 0ΔP=0, ΔT=0\Delta T = 0ΔT=0 (II) ΔGT,P<0\Delta {G_{T,P}} \lt 0ΔGT,P​<0
(C) ΔHreaction\Delta {H_{reaction}}ΔHreaction​ (III) Isothermal and isobaric process
(D) Exothermic Process (IV) [Bond energies of molecules in reactants] −-− [Bond energies of product molecules

Choose the correct answer from the options given below :

  1. A
    (A) - (III), (B) - (II), (C) - (IV), (D) - (I)
  2. B
    (A) - (II), (B) - (III), (C) - (IV), (D) - (I)
  3. C
    (A) - (II), (B) - (III), (C) - (I), (D) - (IV)
  4. D
    (A) - (II), (B) - (I), (C) - (III), (D) - (IV)
View written solutionFree

Correct answer: B

  1. Match (A) Spontaneous process
    For a process to be spontaneous at constant temperature and pressure, the Gibbs free energy must decrease: ΔGT,P<0\Delta G_{T,P} < 0ΔGT,P​<0 So, A→(II)A \to (II)A→(II)

  2. Match (B) Process with ΔP=0\Delta P = 0ΔP=0, ΔT=0\Delta T = 0ΔT=0
    If pressure and temperature do not change, the process is isothermal and isobaric. So, B→(III)B \to (III)B→(III)

  3. Match (C) ΔHreaction\Delta H_{\text{reaction}}ΔHreaction​
    Using bond energies, ΔHreaction=Bond energies of reactants−Bond energies of products\Delta H_{\text{reaction}} = \text{Bond energies of reactants} - \text{Bond energies of products}ΔHreaction​=Bond energies of reactants−Bond energies of products So, C→(IV)C \to (IV)C→(IV)

  4. Match (D) Exothermic process
    In an exothermic process, heat is released, hence enthalpy decreases: ΔH<0\Delta H < 0ΔH<0 So, D→(I)D \to (I)D→(I)

  5. Final matching A−(II),  B−(III),  C−(IV),  D−(I)A-(II),\; B-(III),\; C-(IV),\; D-(I)A−(II),B−(III),C−(IV),D−(I)

  6. Check options
    This corresponds to Option B.

Therefore, the correct answer is B.

PreviousNext

More from Thermodynamics

  • When 5 moles of He gas expand isothermally and reversibly at 300 K from 10 litre to 20 litre, the magnitude of the maximum work obtained is ​ J. [nearest integer] (Given : R = 8.3 J K − 1 mol − 1 and log 2 =…2022 · Numerical
  • Which of the following relation is not correct?2022 · MCQ
  • Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R Assertion A : The reduction of a metal oxide is easier if the metal formed is in liquid state than solid state.…2022 · MCQ
  • Among the following the number of state variables is ​. Internal energy (U) Volume (V) Heat (q) Enthalpy (H)2022 · Numerical
  • 4.0 L of an ideal gas is allowed to expand isothermally into vacuum until the total volume is 2.0 L. The amount of heat absorbed in this expansion is ​ L atm.2022 · Numerical
  • For combustion of one mole of magnesium in an open container at 300 K and 1 bar pressure, Δ CH Θ=− 601.70 kJ mol − 1, the magnitude of change in internal energy for the reaction is ​ kJ. (Nearest…2022 · Numerical
  • When 600 mL of 0.2 M HNO3​ is mixed with 400 mL of 0.1 M NaOH solution in a flask, the rise in temperature of the flask is ​×10−2∘C. (Enthalpy of neutralisation =57 kJ mol−1…2022 · Numerical
  • 17.0 g of NH3​ completely vapourises at − 33.42 ∘ C and 1 bar pressure and the enthalpy change in the process is 23.4 kJ mol − 1. The enthalpy change for the vapourisation of 85 g of NH3​ under the same conditions is ​…2022 · Numerical