Question

In a certain reaction, 10% of the reactant decomposes in one hour, 20% in two hours, 30% in three hours and so on. Dimension of the velocity constant are:

• A. hour${}^{-1}$
• B. mole litre${}^{-1}$ hour${}^{-1}$
• C. litre mol${}^{-1}$ hour${}^{-1}$
• D. mole sec${}^{-1}$

Answer 1

Answer: (B)

mole litre${}^{-1}$ hour${}^{-1}$

For the zero-order reaction, the time taken for the decomposition of the reactant is independent of initial concentration which is the case here.

The dimension of the velocity constant for the zero-order reaction is = mole litre${}^{-1}$ hour${}^{-1}$

Option B is correct.