The sum of the powers of the concentration terms in the rate law expression is called the
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → order of a reaction
NCERT (2026-27 edition):
3.2.3 Order of a Reaction – “In the rate equation …
\( \displaystyle \text{Rate} = k\,[A]^x\,[B]^y \)
… Hence, the sum of powers of the concentration of the reactants in the rate law expression is called the order of that chemical reaction.”