What is the rate of disappearance of B in following reaction? $2 \mathrm{~A}+\mathrm{B} \rightarrow 3…

What is the rate of disappearance of B in following reaction? $2 \mathrm{~A}+\mathrm{B} \rightarrow 3 \mathrm{C}$, if rate of appearance of $\mathrm{C}$ is $1.3 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$.
  1. $4.33 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$
  2. $8.6 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$
  3. $2.6 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$
  4. $5.2 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$

Solution

$\frac{\text { Rate of disappearance of B }}{1}=\frac{\text { Rate of appearance of } \mathrm{C}}{3}$ Rate of disappearance of B $=\frac{1}{3} \times 1.3 \times 10^{-4}$ $=4.33 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$

Asked in: MHT CET 2021 (21 Sep Shift 2)

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