Chemistry · 2026
JEE Main · 21 January 2026, Shift 1 · Q55
For the reaction, N_2 O_4 ⇌ 2 NO_2, graph is plotted as shown below. Identify correct statements. A. Standard free energy change for the reaction is…
For the reaction, $\displaystyle \mathrm{N}_2 \mathrm{O}_4 \rightleftharpoons 2 \mathrm{NO}_2$, graph is plotted as shown below. Identify correct statements.
A. Standard free energy change for the reaction is $\displaystyle -5.40 \mathrm{~kJ} \mathrm{~mol}^{-1}$.
B. As $\displaystyle \Delta \mathrm{G}^{\ominus}$ in graph is positive, $\displaystyle \mathrm{N}_2 \mathrm{O}_4$ will not dissociate into $\displaystyle \mathrm{NO}_2$ at all.
C. Reverse reaction will go to completion.
D. When $\displaystyle 1$ mole of $\displaystyle \mathrm{N}_2 \mathrm{O}_4$ changes into equilibrium mixture, value of $\displaystyle \Delta \mathrm{G}^{\ominus}=-0.84 \mathrm{~kJ} \mathrm{~mol}^{-1}$
E. When $\displaystyle 2$ mole of $\displaystyle \mathrm{NO}_2$ changes into equilibrium mixture, $\displaystyle \Delta \mathrm{G}^{\ominus}$ for equilibrium mixture is $\displaystyle -6.24 \mathrm{~kJ} \mathrm{~mol}^{-1}$.
Choose the correct answer from the options given below :
Official answer
From NTA’s final answer key for this paper.
(2)
D and E only
More from Chemical Thermodynamics
- Consider the reaction 2 H_2 S( g)+3 O_2( g) → 2 H_2 O(l)+2 SO_2( g) The magnitude of enthalpy change for the reaction in kJ mol^-1 is ____. (Nearest…2026
- Consider the reaction X ⇌ Y at 300 K. If Δ H^θ and K are 28.40 kJ mol^-1 and 1.8 × 10^-7 at the same temperature, then the magnitude of Δ S^θ for the…2026
- Gas 'A' undergoes change from state 'X' to state 'Y'. In this process, the heat absorbed and work done by the gas is 10 J and 18 J respectively. Now…2026
- At the transition temperature T, A ⇌ B and Δ G^0=105-35 log T where A and B are two states of substance X. The transition temperature in °C when…2026
- The correct order of molar heat capacities measured at 298 K and 1 bar is:2026
- If 3.365 g of ethanol (l) is burnt completely in a bomb calorimeter at 298.15 K, the heat produced is 99.472 kJ. The |Δ H_f^°| of ethanol at 298.15 K…2026
- Consider the following data. (i) 2 Al(s)+6 HCl(aq) → Al_2 Cl_6(aq)+3 H_2( g)+1200 kJ / mol (ii) H_2( g)+Cl_2( g) → 2 HCl(g)+164 kJ / mol. (iii)…2026
- Given below are two statements: Statement I:For an ideal gas, heat capacity at constant volume is always greater than the heat capacity at constant…2026
JEE Main 2026 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.