The reaction `2A + B + C rarr D + 2E` is found to be first order in `A`, second order in `B` and zero order in `C`. (a) Write the rate expresison. (b) What is the effect on rate on increaisng the concentration of `A, B`, and `C` two times ?

The reaction `2A + B + C rarr D + 2E` is found to be first order in `A

1.	The reaction `2A + B + C rarr D + 2E` is found to be first order in `A`, second order in `B` and zero order in `C`. (a) Write the rate expresison. (b) What is the effect on rate on increaisng the concentration of `A, B`, and `C` two times ?
Answer» (a) Rate `=K[A]^(1)[B]^(2)[C]^(0)` (b) Let initial conc. Of `A, B` and `C` be a, b, and c mol `litre^(-1)` respectively Then, Rate `r_(1) =K a^(1) b^(2) c^(0) …(1)` Now if conc. Of `A, B` and `C` are double, i.e., `2a, 2b` and `2c` respectively, then, `r_(2)=K(2a)^(1) (2a)^(2) (2c)^(0) ...(2)` By eqs. (1) and (2), `r_(1)/r_(2)=1/8` `r_(2)=8r_(1)`

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The reaction `2A + B + C rarr D + 2E` is found to be first order in `A`, second order in `B` and zero order in `C`. (a) Write the rate expresison. (b) What is the effect on rate on increaisng the concentration of `A, B`, and `C` two times ?

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