Question

Which of the following statements is not correct for the reaction, $4A+B⟶2C+2D$?

• A. The rate of appearance of $C$ is one-half the rate of disappearance of $B$
• B. The rate of disappearance of $B$ is one-fourth of the rate of disappearance of $A$
• C. The rate of formation of $D$ is one-half of the rate of consumption of $A$
• D. The rates of formation of $C$ and $D$ are equal

Answer 1

The correct option is A The rate of appearance of $C$ is one-half the rate of disappearance of $B$

$-\frac{1}{4}\frac{d\left[A\right]}{dt}=-\frac{d\left[B\right]}{dt}=\frac{1}{2}\frac{d\left[C\right]}{dt}=\frac{1}{2}\frac{d\left[D\right]}{dt}So,\frac{d\left[C\right]}{dt}=2.\frac{-d\left[B\right]}{dt}$