Rate of chemical reaction

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Question

$A + 3 B \to 2 C$ . Rate of formation of ‘C’ is $10^{- 2} M m i n^{- 1}$ . Rate of disappearance of ‘B’ will be ------ $M m i n^{- 1}$

Moderate

Solution

$\begin{array}{l} - \frac{1}{3} \frac{d [B]}{d t} = + \frac{1}{2} \frac{d [C]}{d t} \\ - \frac{d [B]}{d t} = \frac{3}{2} \frac{d [C]}{d t} \\ = \frac{3}{2} \times 10^{- 2} M \min^{- 1} \\ = 1.5 \times 10^{- 2} M \min^{- 1} \end{array}$

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