Question

In a chemical reaction two reactants takes part. The rate of reaction is directly proportional to the concentration of one of them and inversely proportional to the concentration of the other. The order of reaction is:

• A. zero
• B. 1
• C. 2
• D. 4

Answer 1

Answer: (A)

zero

Answer 2

The order of reaction is zero. Suppose the following reaction takes place. $A+B \longrightarrow$ product $\therefore$ rate $=K[A][B]^{-1}$ $\therefore$ order $=1+(-1)=0$