The concentration of R in the reaction R $\to$ P was measured as a function of time and the following data is obtained :

[R] (molar) 1.0 0.75 0.40 0.10
t(min.) 0.0 0.05 0.12 0.18
The order of the reaction is ___

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Detailed Solution

From the given data $\frac{x}{t} = constant$
$\frac{1 - 0.75}{0.05 - 0} = \frac{0.75 - 0.4}{0.12 - 0.05} = \frac{0.40 - 0.10}{0.18 - 0.12} = 5$
$∴$ Order of reaction is zero.

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