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Write the unit for specific rate constant for a second order reaction.


Unit of second order reaction is L mol–1 s–1

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Define half-life of a reaction.

It the time required for the concentration of a reactant to decrease to half of its initial value.



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Define activation energy of a reaction.

Activation energy of a reaction is defined as the extra energy over and above the average potential energy of the reactants, which must be supplied to the reactants to enable them to cross-over the energy barrier between the reactants and products. It is denoted by EA.

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A reaction is 50% complete in 2 h and 75% complete in 4h. What is the order of the reaction?

First half reaction gets completed within 2 hours and next half reaction gets completed within next 2 hours. That means, t1/2 is indepedent of concentration. Hence, the order of reaction is first order reaction.

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What will be the shape of the curve of concentration of the reactant is plotted against time for a zero order reaction?

The curve for zero order is linear





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