Which among the following reactions is elementary?(a) A + B → R; (-rA) = k CACB(b) 2A + B → R; (-rA) = k CA^2(c) 2A + B → R; (-rA) = k CACB^2(d) A + B → R; (-rA) = k CBThe question was posed to me by my school teacher while I was bunking the class.The query is from Reaction Rates in division Basic Concepts of Chemical Reaction Engineering

Which among the following reactions is elementary?(a) A + B → R; (-r

1.	Which among the following reactions is elementary?(a) A + B → R; (-rA) = k CACB(b) 2A + B → R; (-rA) = k CA^2(c) 2A + B → R; (-rA) = k CACB^2(d) A + B → R; (-rA) = k CBThe question was posed to me by my school teacher while I was bunking the class.The query is from Reaction Rates in division Basic Concepts of Chemical Reaction Engineering
Answer» Right choice is (a) A + B → R; (-rA) = k CACB Explanation: ELEMENTARY reactions are the ones in which rate equation corresponds to stoichiometry. For the REACTION A + B → R, 1 MOLE of A and 1 mole of B TAKE part in the reaction. Hence, the rate equation has to be (-rA) = k CA^1CB^1.

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