Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Thermodynamics question

2025 · 23 Jan · Shift 2 · Q8
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Chemistry
  4. /Thermodynamics
  5. /2025 · 23 Jan · Shift 2 · Q8

Thermodynamics question

2025 · 23 Jan · Shift 2 · Q8

JEE MainChemistryThermodynamicsMCQ+4 / −1

The effect of temperature on spontaneity of reactions are represented as :

Δ\DeltaΔ H Δ\DeltaΔ S Temperature Spontaneity
(A) +++ −-− any T Non spontaneous
(B) +++ +++ low T spontaneous
(C) −-− −-− low T Non spontaneous
(D) −-− +++ any T spontaneous

The incorrect combinations are :

  1. A
    (A) and (C) only
  2. B
    (B) and (D) only
  3. C
    (A) and (D) only
  4. D
    (B) and (C) only
PreviousNext

More from Thermodynamics

  • Let us consider an endothermic reaction which is non-spontaneous at the freezing point of water. However, the reaction is spontaneous at boiling point of water. Choose the correct option.2025 · MCQ
  • Standard entropies of X2​,Y2​ and XY5​ are 70, 50 and 110 J K−1 mol−1 respectively. The temperature in Kelvin at which the reaction 21​X2​+25​Y2​⇌XY5​ΔH⊖=−35 kJ mol−1…2025 · Numerical
  • Which of the following mixing of 1 M base and 1 M acid leads to the largest increase in temperature?2025 · MCQ
  • ​S( g)+23​O2​( g)→SO3​( g)+2xkcalSO2​( g)+21​O2​( g)→SO3​( g)+ykcal​…2025 · MCQ
  • Ice and water are placed in a closed container at a pressure of 1 atm and temperature 273.15 K . If pressure of the system is increased 2 times, keeping temperature constant, then identify correct observation from following2025 · MCQ
  • The formation enthalpies, ΔHf⊖​ for H(g)​ and O(g)​ are 220.0 and 250.0 kJ mol−1, respectively, at 298.15 K , and ΔHf⊖​…2025 · Numerical
  • Consider the following data : Heat of formation of CO2​(g)=−393.5 kJ mol−1 Heat of formation of H2​O(l)=−286.0 kJ mol−1 Heat of…2025 · Numerical
  • An ideal gas undergoes a cyclic transformation starting from the point A and coming back to the same point by tracing the path A→B→C→D→A as shown in the three cases above. Choose the correct option regarding ΔU : Includes diagram2025 · MCQ