The rate of reaction, $A + B ⟶$ Products, is given by the equation, $r = k [A] [B]$ . If $B$ is taken in large excess, the order of reaction would be:

2

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1

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0

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Unpredictable

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Solution

The correct option is B $1$
If $B$ is in excess then $A$ is limiting reagent thus
$ϑ = k [A]$
$∴$ order $= 1.$

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