Chemical Kinetics Question 98

Question: The rates of a certain reaction (dc/dt) at different times are as follows
Time Rate(mole litre-1 sec -1 )
0 $ 2.8\times {10^{-2}}$
10 $ 2.78\times {10^{-2}} $
20 $ 2.81\times {10^{-2}} $
30 $ 2.79\times {10^{-2}} $

The reaction is [NCERT 1978]

Options:

A) Zero order

B) First order

C) Second order

D) Third order

Show Answer

Answer:

Correct Answer: A

Solution:

The concentration of reactant does not change with time for zero order reaction (unit of K suggests zero order) since reactant is in excess.



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