Chemical Kinetics and Nuclear ChemistryMedium

Question

Match List I with List II:

List-I (Order of reaction) List-II (Unit of rate constant)
A. Zero order I. $${mol}^{- 1}\text{ }L{\text{ }s}^{- 1}$$
B. First order II. $${mol}^{- 2}{\text{ }L}^{2}{\text{ }s}^{- 1}$$
C. Second order III. $$s^{- 1}$$
D. Third order IV. $$molL^{- 1}{\text{ }s}^{- 1}$$

Choose the correct Ans. from the options given below :

Options

A.A-IV, B-II, C-I, D-III
B.A-IV, B-III, C-I, D-II
C.A-IV, B-III, C-II, D-I
D.A-I, B-II, C-III, D-IV

Solution

Sol. [Key Concept: Matching coordination/structure concepts]

Unit for rate constant of $n^{\text{th}\text{~}}$ order reaction $= \left( \frac{mol}{L} \right)^{1 - n}s^{- 1}$

For zero order reaction $\Rightarrow n = 0$; unit $\Rightarrow molL^{- 1}{\text{ }s}^{- 1}$

For first order reaction $\Rightarrow n = 1$; unit $\Rightarrow s^{- 1}$

For second order reaction $\Rightarrow n = 2$; unit $\Rightarrow {mol}^{- 1}\text{ }L{\text{ }s}^{- 1}$

For third order reaction $\Rightarrow n = 2$; unit $\Rightarrow {mol}^{- 2}{\text{ }L}^{2}{\text{ }s}^{- 1}$

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