JEE Advanced Model Paper 9 with solutions for online practice

The reaction : 2NO + H2 → H2 + 2H2O has been assigned to follow the followingmechanism.
I . NO + NO ⇌ N2O2 (fast)
II. N2O2 + H2 → N2O + H2O (slow)
III. N2O + H2 → N2 + H2O (fast)
The rate constant of step II is 1.2 × 10−4 l mole−1min−1 1while equilibrium constant ofstep I is 1.4 × 10−2 L mole−1
What is the rate of reaction when concentration of NO and H2 each is 0.5 mole L−1