A) bimolecular reaction
B) second order reaction
C) first order reaction
D) unimolecular reaction
Correct Answer: D
Solution :
There are two different reactants (say A and S). \[A+B\xrightarrow{{}}product\] Thus it is a bimolecular reaction. If \[\frac{dx}{dt}=k[A][B]\] it is second-order reaction If \[\left( \frac{dx}{dt} \right)=k[A]=k[B]\] it is first order reaction. Molecularity is independent of rate, but is the sum of the reacting substances thus it cannot be unimolecular reaction.
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