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Q.

In the reaction A  +  2B  ⇌ 2C, if 2 moles of A, 3.0 moles of B and 2.0 moles of C are placed in a 2.0 L flask and the equilibrium concentration of C is 0.5 mole/L. The equilibrium constant KC for the reaction is

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a

0.073

b

0.147

c

0.05

d

0.026

answer is C.

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Detailed Solution

A    +    2B   ⇌   2C  here equilibrium shifted to backInitial conc.       2            3           2at eqm.             2.5         4            1Molar     2.52=1.25    42=2    12=0.5K=0.521.25  ×  22= 0.05
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In the reaction A  +  2B  ⇌ 2C, if 2 moles of A, 3.0 moles of B and 2.0 moles of C are placed in a 2.0 L flask and the equilibrium concentration of C is 0.5 mole/L. The equilibrium constant KC for the reaction is