Medium
Rate of reaction is $r_1 = k[A]^a[B]^b$. If the concentration of $A$ is doubled and $B$ is halved,the new rate is $r_2$. What is the value of $\frac{r_2}{r_1}$?
- A$2^{a-b}$
- B$2^{a+b}$
- C$2^{b-a}$
- D$2^{-(a+b)}$
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Difficult
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