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For the reaction $2A + 3B \to$ products, it is found that doubling the concentration of both reactants, increases the rate by a factor of 4. But doubling the concentration of A alone, only doubles the rate. What is the total order of the given reaction ?

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answer is B.

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Detailed Solution

rate = ${K[H}_{2} O_{2} {][I}^{-}]$

$\begin{array}{l} 4 = 2^{x} {, 2}^{y} \\ 2^{x} = 2 \\ ∴ x = 1and y = 1 \end{array}$

Total order = 1+1 =2

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