N2O4 dissociates to NO2 for which equilibrium constant ( Kp ) is 0.2 at 300 K. Find out the fraction of N2O4 dissociated at total pressure of 4 atm pressure having 1 mole of Argon at equilibrium. Assume α being small for solving the problem.
a. 0.158
b. 0.058
c. 0.250
d. 0.015