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Half life

Units of rate...

Question

Units of rate constant of a first order reaction is :

m o l e . l i t^{- 1}

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l i t . m o l e

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m o l e . s e c^{- 1}

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s e c^{- 1}

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Solution

The correct option is C $s e c^{- 1}$
A $\to$ product
For first order reaction, rate is dependent on single reactant A for example, rate = k[A]
$k = \frac{r a t e}{[A]}$
$= \frac{m o l e}{l i t e r} s e c \times \frac{l i t e r}{m o l e}$
$= s e c^{- 1}$

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