In the reaction, `P+Q rarr R+S`
the time taken for `75%` reaction of `P` is twice the time taken for `50%` reaction of `P`. The concentration of `Q` varies with reaction time as shown in the figure. The overall order of the reaction is

Options

A. `2`
B. `3`
C. `0`
D. `1`

Answer

D

Explanation

Overall order reaction can be decided by the data given `t_(75%) = 2t_(50%)`
`:.` It is a first order reaction with respect to `P`.
form graph `[Q]` is linearly decreaisng with time, i.e., order of reaction w.r.t. `Q` is zero and the rate expresison is `r = [P]^(1)[Q]^(0)`.
Hence (d) is correct.