Rate of the reaction =K[NO]x[H2]y where Kis rate constant and x, y are order of reaction w.r.t. NO and H2 respectively. From observations A and B 7×10−9=K(8×10−5)x(8×10−5)y ...(i) and 2.1×10−8=K(24×10−5)x(8×10−5)y ...(ii) Dividing Eqs. (i) by (ii)