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  •  A first order reaction takes 30 minute for 20% decomposition &nb

 A first order reaction takes 30 minute for 20% decomposition \mathrm{t_\mathrm{1/2}} for the reaction is approx.. 

 

Option: 1

66 min 


Option: 2

93 min


Option: 3

116 min


Option: 4

Infinite time


Answers (2)

best_answer

\mathrm{K}= \frac{0.693}{t_{1 / 2}}=\frac{2.303}{t} \times \log \left(\frac{A_o}{A}\right) \\

\mathrm{ \Rightarrow \frac{0.693}{t_{1 / 2}}=\frac{2.303}{30} \times \log \left(\frac{100}{80}\right) \\ }

\mathrm{ \Rightarrow \mathrm{t}_{1 / 2}=93.15 \mathrm{~min }}.
 

Posted by

Gautam harsolia

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JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

t1/2=99min

Posted by

Kartik

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