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Standard entropies of X_2, Y_2 and XY_3 are 60,40 and 50 ~J ~K ~K^-1 ~mol^-1 respectively. For the reaction 1 2 X_2+ 3 2 Y_2 ⇌ XY_3 ; Δ H=-30 ~kJ, to…

NEET UG 2010 — Chemistry Physical Chemistry

2010mcqmedium

Standard entropies of X2,Y2\mathrm{X}_2, \mathrm{Y}_2X2​,Y2​ and XY3\mathrm{XY}_3XY3​ are 60,40 and 50 J K K−1 mol−150 \mathrm{~J} \mathrm{~K} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}50 J K K−1 mol−1 respectively. For the reaction 12X2+32Y2⇌XY3;ΔH=−30 kJ\frac{1}{2} \mathrm{X}_2+\frac{3}{2} \mathrm{Y}_2 \rightleftharpoons \mathrm{XY}_3 ; \Delta \mathrm{H}=-30 \mathrm{~kJ}21​X2​+23​Y2​⇌XY3​;ΔH=−30 kJ, to be at equilibrium, the temperature should be

Official previous-year question

Held on 30 Apr 2010 · Verified 9 Jul 2026.

Options

  1. A

    750 K750 \mathrm{~K}750 K

  2. B

    1000 K1000 \mathrm{~K}1000 K

  3. C

    1250 K1250 \mathrm{~K}1250 K

  4. D

    500 K500 \mathrm{~K}500 K

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