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The rate law for a reaction between the ...

The rate law for a reaction between the substances A and B is given by rate =`k (A)^n (B)^m`.On doubling the conc. Of A and halving the conc.of B. The ratio of the new rates to the earlier rate of the reaction will be as

A

`1/ 2^m+n`

B

`m+n`

C

`n -m `

D

`2 ^n-m`

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