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  4. For a reaction between A and B the order with respect to A is 2 and the order with respect to B is 3. The concentration of both A and B are doubled the rate will increase by a factor of :

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Q. For a reaction between A and B the order with respect to A is 2 and the order with respect to B is 3. The concentration of both A and B are doubled the rate will increase by a factor of :

NEETNEET 2013Chemical Kinetics

Solution:

Given, Order of $A=2 ;$
Order of $B=3 ;$
Rate $\propto[A]^{2}[B]^{3}$
If both concentrations of $A$ and $B$ are doubled.
Rate $\propto[2 A]^{2}[2 B]^{3}$
Rate $\propto 32[A]^{2}[B]^{3}$
Rate increases by a factor of $32 .$