Question

For the reaction, $4A+B\to 2C+2D$ , the statement not correct is

• A. The rate of disappearance of B is 1/4 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

Answer: (B)

Here statement in option B is incorrect while rest other statements are correct as
$-\frac{1}{4}\frac{dA}{dt}=\frac{-dB}{dt}=\frac{1}{2}\frac{dC}{dt}=\frac{1}{2}\frac{dD}{dt}$
$-\frac{1}{4}\frac{dA}{dt}==\frac{1}{2}\frac{dC}{dt}$
$\frac{dC}{dt}=\frac{1}{2}\frac{dA}{dt}=\frac{2dB}{dt}$
Hence the rate of appearance of C is twice the rate of disappearance of B.