For the reaction 4A + B -> 2C + 2D, which statement is INCORRECT?

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

Correct answer: The rate of appearance of C is half the rate of disappearance of B

Solution

Since C has coefficient 2 and B has coefficient 1, the rate of appearance of C is twice (not half) the rate of disappearance of B, making that statement incorrect.

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