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JEE Main 18 March 2021, Shift 2, Chemistry Q53

Question 53 of 90 in this shift, Chemistry question 23 of 30, Section B.

The gas phase reaction

\mathrm{2A(g) \rightleftharpoons A_2(g)}

at 400 K has

\Delta G^\circ = +25.2

kJ mol

^{-1}

. The equilibrium constant

\mathrm{K_C}

for this reaction is __________

\times 10^{-2}

. (Round off to the Nearest Integer). [Use : R = 8.3 J mol

^{-1}

^{-1}

, ln 10 = 2.3

\log_{10} 2 = 0.30

, 1 atm = 1 bar] [antilog

(-0.3) = 0.501

]

Official answer

166

NTA final key.

Same idea in other shifts