Question

For the reaction, $A+B⟶2C+D$, which one is the incorrect statement?

• A. Rate of disappearance of $A=$ Rate of disappearance of $B$
• B. Rate of disappearance of $A=$ Rate of appearance of $D$
• C. Rate of disappearance of $B=2\times$ rate of appearance of $C$
• D. Rate of disappearance of $B=\frac{1}{2}\times$ rate of appearance of $C$

Answer 1

The correct option is C Rate of disappearance of $B=2\times$ rate of appearance of $C$

$A+B\to 2C+D$

For this reaction, we can write:

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

Hence,

Rate of disappearance of $B=\frac{1}{2}\times$ rate of disappearance of $C$.

Hence the statement $C$ is incorrect.