Which of the following graphs is correct for a zero order reaction?
for a zero-order reaction,
R is the molar concentration of reactants.
Hence the reaction rate remains constant with time and becomes zero when the concentration of reactants is zero.
At t=0, R=R0 and at t=t, R=R, where R is the concentration of reactants at time t.
Integrating w.r.t. t on both side and putting limit we get,
[R]=-kt + [R0]
Following an equation of a line with negative slope, hence the graph (iv) is correct.
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Note: In the following questions match the items of Column I with appropriate item given in Column II.
Match the graph given in Column I with the order of reaction given in Column II. More than one item in Column I may link to the same item of Column II.
Column I Column II
(ii) (a) first order
(iii) (b) zero order
Chemistry - Exemplar