Match the items of Column I and Column II.
Column I Column II
(i) Mathematical expression for rate of reaction (a) rate constant
(ii) Rate of reaction for zero order reaction is equal to (b) rate law
(iii) Units of rate constant for zero order reaction is same as that of (c) order of slowest step
(iv) Order of a complex reaction is determined by (d) rate of a reaction
(i)→ (b),(ii)→ (a),(iii)→ (d),(iv)→ (c)
(i) →(b),
Rate of a reaction is the rate of disappearance of a reactant or appearance of a product.
Rate=-d[R]/dt=(d[P])/dt
Where R is the molar concentration of reactant and P is the molar concentration of the product.
The equation is known as Rate Law.
(ii) →(a), For a zero-order reaction, Rate is only depending on rate constant i.e. it is independent of the concentration of the reactant.
Rate=k〖[R]〗^0
Where k is the rate constant and R is the molar concentration of a reactant.
(iii) →(d), For a zero-order reaction, Rate is only depending on rate constant i.e. it is independent of the concentration of the reactant.
Rate=k〖[R]〗^0
Where k is the rate constant and R is the molar concentration of a reactant.
Thus, the above equation changes to,
Rate=k
Hence, the units of the rate constant are the same as that of the rate.
(iv) →(c), Complex reactions occur in the steps and the slowest step is said to be the rate-determining step as it involves the formation of the intermediate.
Thus, the order of the slowest step of the complex reaction is the order of the overall reaction.