Which of the following do not define instantaneous reactions?
A
Appearance of a product over a particular time interval
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B
Change in the concentration of the products at a particular instant of time
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C
Change in the concentration of the reactants at a particular instant of time
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D
Reactions completed in fraction of seconds
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Solution
The correct option is A Appearance of a product over a particular time interval Instantaneous rate of reaction measures the infinitesimally small change in concentration that occurs over an infinitesimally short period of time. The rate of reaction changes while it is being measured.