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Q.

At 400K, in a 1.0L vessel N2O4 is allowed to attain equilibrium N2(g) +O2⇌2NO2(g) At equilibrium the total pressure is 600mm Hg, when 20% of N2O4 is dissociated. The KP value for the reaction 

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a

150

b

100

c

 50

d

200

answer is B.

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Detailed Solution

 KP= P2NO2/PN2O4,

N2O4.=2NO2,

 In the equilibrium

Solution, 0.4+0.8 =1.2 total moles.

Kp =  (0.4/1.2×600)/(0.8/1.2×600) = 100

Therefore, the correct answer is option (B)100

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