Chemical Kinetics - Result Question 12
####12. For the reaction $2 A+B \to 3 C+D$
which of the following does not express the reaction rate?
[2006]
(a) $-\frac{d[B]}{d t}$
(b) $\frac{d[D]}{d t}$
(c) $-\frac{1}{2} \frac{d[A]}{d t}$
(d) $-\frac{1}{3} \frac{d[C]}{d t}$
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Solution:
(d) In the given options, $-\frac{d[C]}{3 d t}$ will not represent the reaction rate. It should not have -ve sign as it is product; since $\frac{1}{3} \frac{d[C]}{d t}$ show the rate of formation of product $C$, which will be positive.
