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Order of Reaction

Rate constant...

Question

Rate constant of a reaction is $175$ ${l i t r e}^{- 2}$ ${m o l}^{- 2}$ ${s e c}^{- 1}$ . What is the order of reaction?

A

First

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B

Second

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C

Third

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D

Zero

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Solution

The correct option is C Third
Unit of $k = {[\frac{l i t r e}{m o l}]}^{n - 1} \times {s e c}^{- 1}$ ...(i)
Given unit of $k = {l i t r e}^{2} {m o l}^{- 2} {s e c}^{- 1}$ ...(ii)
Comparing the unit of litre,
$n - 1 = 2$
$n = 3$

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Q. The unit of rate constant for a reaction is

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sec.
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Q. The rate constant

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