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  •  Consider the reaction <img alt="\mathrm{A {\longrightarrow} B\: \& \: 2 A \rightarrow C}" src="/latex-image/?%5Cmathrm%7BA%20%7B%5Clongrightarrow%7D%20B%5C%3A%20%5C%26%20%5C%3A%202%20A%20

 Consider the reaction \mathrm{A {\longrightarrow} B\: \& \: 2 A \rightarrow C}, occurring in parallel. If the rate constant for the first reaction \mathrm{\left(k_{1}\right)} is \mathrm{2 \times 10^{-2} \mathrm{~s}^{-1}} & for the second reaction \mathrm{\left(k_{2}\right)} is \mathrm{4 \times 10^{-2} \mathrm{~s}^{-1}}, What is the overall rate constant \mathrm{(k)}for the parallel reactions?

 

Option: 1

6 \times 10^{-2} \mathrm{~s}^{-1}


Option: 2

8 \times 10^{-2} \mathrm{~s}^{-1}


Option: 3

2 \times 10^{-2} \mathrm{~s}^{-1}


Option: 4

4 \times 10^{-2} s^{-1}


Answers (1)

best_answer

For a parallel reactions, the overall rate constant \left ( k \right ) is the sum of the individual rate constants \mathrm{\left(k_{1}+k_{2}\right)}

\mathrm{K_{\text {overall }}=k_{1}+k_{2}=2 \times 10^{-2}+4 \times 10^{-2} }
\mathrm{k_{\text {overall }}=6 \times 10^{-2} \mathrm{~s}^{-1}}
 

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