Chemistry Question 74 – JEE-MAIN 2026

In a closed flask at $600\text{ K}$, one mole of $X_2{Y}_4(g)$ attains equilibrium as given below : $$X_2{Y}_4(g)\rightleftharpoons 2X{Y}_2(g)$$ At equilibrium, $75\mathrm{\%}{X}_2{Y}_4(g)$ was dissociated and the total pressure is $1\text{ atm}$. The magnitude of ${\mathrm{\Delta }}_r{G}^{\ominus }$ (in ${\text{kJ mol}}^{-1}$) at this temperature is _______. (Nearest Integer) (Given : $R=8.3{\text{ J mol}}^{-1}{\text{ K}}^{-1}$, $\ln 10=2.3$, $\log 2=0.3$, $\log 3=0.48$, $\log 5=0.69$, $\log 7=0.84$)