A) \[-\frac{d\,[C]}{3\,dt}\]
B) \[-\frac{d\,[B]}{dt}\]
C) \[\frac{d\,[D]}{dt}\]
D) \[-\frac{d\,[A]}{2\,dt}\]
Correct Answer: A
Solution :
For the reaction \[2A+B\to 3C+D\] The reaction rate is written as follows: The reaction rate w.r.t. \[A=-\frac{1}{2}\,\frac{d\,[A]}{dt}\] The reaction rate w.r.t \[B=-\frac{d\,[B]}{dt}\] The reaction rate w.r.t \[C=+\frac{1}{3}\,\frac{d\,[C]}{dt}\] The reaction rate w.r.t \[D=\frac{d\,[D]}{dt}\] for product we take + sign because concentration of product increases with time Hence, the answer (a) is not correct expression to represent the rate of reaction.
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