# NEET Chemistry Chemical Kinetics Questions Solved

BOARD

What is meant by rate of a reaction? Differentiate between average rate and instantaneous rate of a reaction.

Rate of reaction : It is the change in concentration of the reactants or products in a unit time.

Average rate : Average rate depends upon the change in concentration of reactants or products and the time taken for the change to occur. R$\to$P

Average rate = $-$$\frac{\Delta \left[R\right]}{\Delta t}$

or  Average rate =$+$$\frac{\Delta \left[P\right]}{\Delta t}$

Instantaneous rate : It is defined as the rate of change in concentration of any one of the reactant or product at a particular moment of time.

$\underset{∆t\to 0}{\mathrm{lim}}$ $\left[\frac{-\Delta d\left[R\right]}{dt}\right]$ = $\frac{-d\left[R\right]}{dt}$

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