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  • For the reaction:  2A→1/3B, rate of disappearance of ‘A’ related to the rate of appearance of ‘B’ by the expression:  <s

For the reaction:  2A→1/3B, rate of disappearance of ‘A’ related to the rate of appearance of ‘B’ by the expression:

 

Option: 1

\mathrm{-\frac{d[A]}{d t}=\frac{-2}{3} \times \frac{d[B]}{d t}\\ }


Option: 2

\mathrm{-\frac{d[A]}{d t}=\frac{+3}{2} \times \frac{d[B]}{d t} }


Option: 3

\mathrm{-\frac{d[A]}{d t}=-6 \times \frac{d[B]}{d t}\\ }


Option: 4

\mathrm{-\frac{d[A]}{d t}=+6 \times \frac{d[B]}{d t} }


Answers (1)

best_answer

For a reaction, if:
\mathrm{a P+b Q \rightarrow c R+d S }
Overal rate \mathrm{r } can be expressed as:
\mathrm{ r=\frac{-1}{a} \times \frac{d[P]}{d t}=\frac{-1}{b} \times \frac{d[Q]}{d t}=\frac{+1}{c} \times \frac{d[R]}{d t}=\frac{+1 d|S|}{d d t} }
The given reaction is:
\mathrm{ 2 A \rightarrow \frac{1}{3} B \\ }
\mathrm{ r=\frac{-1}{2} \times \frac{d[A]}{d t}=\frac{+3}{1} \times \frac{d[B]}{d t} \\ }
\mathrm{ -\frac{d[A]}{d t}=+6 \times \frac{d[B]}{d t} }.

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sudhir.kumar

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