Question

$B+B\to E+D\left(slow\right)$
$E+A\to B+C$
Based on the above reaction mechanism, which of the following statements is true?

• A. The overall is: $A+B\to C+D$, and $E$ is an intermediate.
• B. The overall is: $A+2B\to C+D$, and $E$ is an intermediate.
• C. The overall is: $A+B\to C+D$, and $E$ is a catalyst.
• D. The overall is: $A+2B\to C+D$, and $E$ is a catalyst.

Answer 1

Answer: (A)

The overall is: $A+B\to C+D$, and $E$ is an intermediate.

$B+B⟶E+D\left(Slow\right)E+A⟶B+C$

Overall reaction:- $A+B⟶C+D$

An intermediate is the compound that is product during a reaction & is consumed before the reaction goes to completion. Therefore, In this case, E is an intermediate.

Therefore, (A) is the correct answer.