Question

For the reaction,

$4A+B\to 2C+2D$

Select the incorrect statement.

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

Answer 1

The correct option is B The rate of appearance of C is half the rate of disappearance of B

$4A+B\to 2C+2D$

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

$\therefore$ Option B states incorrectly.

Hence, the correct option is B.