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First Order Reaction

If a I-order ...

Question

If a I-order reaction is completed to the extent of $60 %$ and $20 %$ in time intervals, $t_{1}$ and $t_{2}$ what is the ratio, $t_{1} : t_{2}$ ?

A

6.32

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B

5.587

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C

4.11

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D

8.33

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Solution

The correct option is D 4.11
In 1st Order Reaction,

$\frac{t_{1}}{t_{2}} = \frac{l o g (\frac{100}{100 - 60})}{l o g (\frac{100}{100 - 20})}$

$\frac{t_{1}}{t_{2}} = 4.11$

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