The plot of concentration of a reactant versu | vedclass

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(A) The correct option is $A$.For a reaction $X \longrightarrow Y$,if the reaction is of $n$th order,the rate is given by $	ext{rate} = -\frac{d[X]}{

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(A) The correct option is $A$.For a reaction $X \longrightarrow Y$,if the reaction is of $n$th order,the rate is given by $	ext{rate} = -\frac{d[X]}{dt} = k[X]^n$.From the given graph,the plot of concentration $[X]$ versus time $t$ is a straight line with a negative slope.$A$ straight line graph for $[X]$ versus $t$ indicates that the rate of reaction $(-\frac{d[X]}{dt})$ is constant and independent of the concentration of the reactant.Since the rate is constant,the order of the reaction $n$ must be $0$ (i.e.,$	ext{rate} = k[X]^0 = k$).

The plot of concentration of a reactant versus time for a chemical reaction is shown below. The order of this reaction with respect to the reactant is

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