The reaction 2A + B → C is first order with respect to A and first order with respect to B. What is the overall order of the reaction?
Correct: B
The overall order of a reaction is the sum of the exponents of the concentration terms in the rate equation. Since the reaction is first order with respect to A (exponent of 1) and first order with respect to B (exponent of 1), the overall order is 1 + 1 = 2.