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A reaction has the rate expression Rate = k[A]^1/2 [B]^3/2. What is the overall order of the reaction?
A1
B3
C2
D1.5
Answer & Solution
Correct answer: C. 2
1. Overall order is the sum of the exponents of concentration terms.
2. Order $= \tfrac{1}{2} + \tfrac{3}{2}$.
3. $= 2$, so it is a second order reaction.
_Source: NCERT Class 12 Chemistry Ch 3 "Chemical Kinetics", p.7_
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