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Chemistry Question on Rate of a Chemical Reaction

Unit of rate constant of zero order reaction is:

A

time −1^{-1}

B

mol lit−1sec⁡−1^{-1}\sec ^{-1}

C

litre mol−1sec⁡−1^{-1}\sec {-1}

D

litre mol −1sec⁡^{-1}\sec

Answer

mol lit−1sec⁡−1^{-1}\sec ^{-1}

Explanation

Solution

Unit of zero order rate constant Rate =K[ conc ]0=K[\text { conc }]^{0} K=K= Rate = change in concentration  time interval =\frac{\text { change in concentration }}{\text { time interval }} = Mol/litre  second=\frac{\text { Mol/litre }}{\text { second}} ∴\therefore Unit of KK is mole litre −1sec⁡−1^{-1} \sec ^{-1}