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Q.

XY2  dissociates XY2(g)⇌XY(g)+Y(g) .When the initial pressure of XY2 is 600mm Hg, the total equilibrium pressure is 800 mm Hg.Calculate K for the reaction .Assuming that the volume of the system remains unchanged

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a

50.0

b

100.0

c

166.6

d

400.0

answer is B.

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Detailed Solution

XY2⇌XY+Y Initial    P         0     0Final      P-x      x     xInitial P=600 mm Hg.Final P=800 mmHg Total mole ∝  final PP-x+x+x∝ 800600-x+x+x∝ 800x = 200 mm Hg∝K=x×xP−x=200×200400=100 Hg
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