Question:
Units of rate constant for first and zero order reactions in terms of molarity $M$ unit are respectively
Units of rate constant for first and zero order reactions in terms of molarity $M$ unit are respectively
Updated On: Jul 28, 2022
- $M \,sec^{-1}, \,sec^{-1}$
- $M\,sec^{-1}$
- $sec^{-1}, M \,sec^{-1}$
- $sec^{-1}, M$
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The Correct Option is C
Solution and Explanation
Unit of rate constant $=\left[\frac{1}{M}\right]^{n-1} time^{-1}$
for zero order, $\left[\frac{1}{M}\right]^{-1} sec^{-1}=M \,sec^{-1}$
for first order , $\left[\frac{1}{M}\right]^{1-1} sec^{-1}=sec^{-1}$
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Concepts Used:
Rate of a Chemical Reaction
The rate of a chemical reaction is defined as the change in concentration of any one of the reactants or products per unit time.
Consider the reaction A → B,
Rate of the reaction is given by,
Rate = −d[A]/ dt=+d[B]/ dt
Where, [A] → concentration of reactant A
[B] → concentration of product B
(-) A negative sign indicates a decrease in the concentration of A with time.
(+) A positive sign indicates an increase in the concentration of B with time.
Factors Determining the Rate of a Reaction:
There are certain factors that determine the rate of a reaction:
- Temperature
- Catalyst
- Reactant Concentration
- Chemical nature of Reactant
- Reactant Subdivision rate