Medium
Consider the reaction $2 \ A + 2 \ B \rightarrow C + 2 \ D$. If the concentration of $A$ is doubled at constant $B$,the rate increases by a factor of $4$. If the concentration of $B$ is doubled at constant $A$,the rate is doubled. What is the rate law?
- A$r = k[A]^{2}[B]^{2}$
- B$r = k[A]^{4}[B]^{2}$
- C$r = k[A][B]^{2}$
- D$r = k[A]^{2}[B]$
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