MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryChemical EquilibriumEffect of Stoichiometry on K

In the two gaseous reactions (i) and (ii), at 25ºC (i) NO(g) + 1/2O2(g) NO2(g); K1 (ii) 2NO2(g) 2NO(g) + O2 (g), K2 the equilibrium constants K1 and K2 are related as

A.K2 = 1/K1

B.K2 = K1/2

D.K2 =

Explanation

1 2 K 2 2 2 1 1 2 2 K 2 2 2 2 2 2 2 2 2 2 1 2 2 2 2 2 2 1 2 1 NO(g) O NO (g) 2 [NO ] K (1) [NO][O ] 2 NO (g) 2NO(g) O (g) [NO] [O ] K (2) [NO ] From equation (1), squaring both side: [NO ] K [NO] [O ] [NO] [O ] 1 (3) K [NO ] From eq (2) >> 2 2 1 and (3) 1 K (K ) Hence, the correct answer is option (c)

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