Question:
Unit of rate constant of zero order reaction is:
Unit of rate constant of zero order reaction is:
Updated On: Jul 28, 2022
- time $^{-1}$
- mol lit$^{-1}\sec ^{-1}$
- litre mol$^{-1}\sec {-1}$
- litre mol $^{-1}\sec$
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The Correct Option is B
Solution and Explanation
Unit of zero order rate constant
Rate $=K[\text { conc }]^{0}$
$K=$ Rate $=\frac{\text { change in concentration }}{\text { time interval }}$
$=\frac{\text { Mol/litre }}{\text { second}}$
$\therefore$ Unit of $K$ is mole litre $^{-1} \sec ^{-1}$
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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