Which of the following graphs is the characteristic of a zero order reaction ?

Options

A.
B.
C.
D.

Answer

D

Explanation

In a zero order reaction, rate is independent of the concentration of the reactants. Mathematically, a reaction is said to be zero order when the rate is proportional to zero power of the reaction concentration.
`(dx)/(dt)=K_(0)(a-x)^(0)=K_(0)`
The first graph describes a third order reaction
`((dx)/(dt)=K_(3)(a-x)^(3))` , Second graph describes a second order reaction `((dx)/(dt)=K_(2)(a-x)^(2))` and third graph describes a first order reaction `((dx)/(dt)K_(1)(a-x))` .
Alternatively, the order `(n)` can also be determined from the slope of the curve plotted log `((dx)/(dt))` and log `(a-x)` :
`((dx)/(dt))=K(a-x)^(n)`
log `((dx)/(dt))=logK+nlog(a-x)`