In the reaction 2 NO + Cl2 → 2 NOCl, it has been found that doubling the concentration of both the reactants increases the rate by a factor of eight but doubling the chlorine concentration alone only doubles that rate. Which of the following statement is correct?
a. The reaction is second order in Cl2
b. The reaction is first order in NO
c. The overall order of reaction is 2
d. The overall order of reaction is 3
