Question

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

• A. $0$
• B. $1$
• C. $2$
• D. not possible to determine from this plot

Answer 1

Answer: (A)

$0$

The order of this reaction with respect to the reactant is zero-order reaction is reaction in which the rate does not vary with the increase or decrease in the concentration of the reactants.

Therefore the rate of these reactions is always equal to the rate constant ($K$) of the specific reactions (since the rate of these reactions is proportional to the 0th power of reactants concentration).

The Differential form of a zero-order reaction can be written as

Rate $=\frac{dA}{dt}=k[A{]}^0=k$

Hence option A is correct.