For the Overall Reaction a + 2B ? C
Which

question 19

Multiple Choice

For the overall reaction A + 2B ? C
Which of the following mechanisms yields the correct overall chemical equation and is consistent with the rate equation below?
Rate = k[A]×[B]

• A)
• \(\begin{array}{l}
• \mathrm{A}+\mathrm{B} \rightleftharpoons \mathrm{I} &\text { (fast) } \\
• \mathrm{I}+\mathrm{A} \rightarrow \mathrm{C} &\text { (slow) }
• \end{array}\)
• B)
• \(\begin{array}{l}
• \mathrm{A}+\mathrm{B} \rightarrow \mathrm{I} &\text { (slow) } \\
• \mathrm{I}+\mathrm{B} \rightarrow \mathrm{C} &\text { (fast) }
• \end{array}\)
• C)
• \(\begin{array}{l}
• 2 \mathrm{~B} \rightarrow \mathrm{I} &\text { (slow) } \\
• \mathrm{A}+\mathrm{I} \rightarrow \mathrm{C} &\text { (fast) }
• \end{array}\)
• D)
• \(\begin{array}{l}
• 2 \mathrm{~B} \rightleftharpoons \mathrm{I}& \text { (fast) } \\
• \mathrm{I}+\mathrm{A} \rightarrow \mathrm{C} &\text { (slow) }
• \end{array}\)
• E)
• \(\begin{array}{l}
• \mathrm{A}+2 \mathrm{~B} \rightleftharpoons \mathrm{I} &\text { (fast) } \\
• \mathrm{I}+\mathrm{B} \rightarrow \mathrm{C}+\mathrm{B} &\text { (slow) }
• \end{array}\)

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