For a reaction pA+qB→product, the rate law expression is r=k[A]l[B]m, then:
A
(p+l)<(l+m)
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B
(p+q)>(l+m)
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C
(p+q) may or may not be equal to (l+m)
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D
(p+q)=(l+m)
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Solution
The correct option is C(p+q) may or may not be equal to (l+m) p and q are stoichiometric coefficients while l and m are the order of the reaction with respect to A and B respectively. There is no relation between order and stoichiometric coefficients. Also order must be obtained experimentally. Hence, (p+q) may or may not be equal to (l+m).