For the reaction A + B ⇌ C + D, Kc = 9. If A and B are taken in equal amounts, then amount of C at equilibrium is :
(1) 1                    (2) 0.25                   (3) 0.75                      (4) None of these

                    A +B C +DInitial           1       1         -    -At eqm      1-x  1-x    x      xnv            1-x1   1-x1  x1  x1 KC = [C][D][A][B]9 = 1-x1-xx × x9x2= 1-2x+x21-2x-8x2 =0x= 0.25
Thus the amount of [C] = x = 0.25
Option 2 is correct. 

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