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Rate expressions for reactants and products
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For a reaction $3A\rightarrow2B$ The average rate of appearance of B is given by $\dfrac{\Delta[B]}{\Delta t}$. The correct relation between the average rate of appearance of B with the average rate of disappearance of A is given in option:A $\dfrac{-\Delta[A]}{\Delta t}$B $\dfrac{-3\Delta[A]}{2\Delta t}$C $\dfrac{-2\Delta[A]}{3\Delta t}$D $\dfrac{\Delta[A]}{\Delta t}$$r=-\dfrac{1}{3}\dfrac{\Delta[A]}{\Delta t}=+\dfrac{1}{2}\dfrac{\Delta[B]}{\Delta t}\Rightarrow\dfrac{\Delta[B]}{\Delta t}=-\dfrac{2}{3}\dfrac{\Delta[A]}{\Delta t}$.