# NEET Chemistry Chemical Kinetics Questions Solved

BOARD

A reaction is of second order with respect to a reactant. How is the rate of reaction affected if the concentration of the reactant is reduced to half? What is the unit of rate constant for such a reaction?

Rate = K[A]2 = Ka2

If [A] =$\frac{1}{2}$a          Rate= K${\left(\frac{a}{2}\right)}^{2}$ =$\frac{1}{4}$Ka2

$\therefore$  Rate =${1}{4}}^{th}$ (one fourth of original rate)

The unit of rate constant is L mol-1 s-1 .

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