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  • The inactivation rate of viral preparation is proportional to the amount of virus. In first minute after preparation, 20 % of the virus is inactivated. Calculate the rate constant for viral in

The inactivation rate of viral preparation is proportional to the amount of virus. In first minute after preparation, 20 % of the virus is inactivated. Calculate the rate constant for viral inactivation in \mathrm{\mathrm{min}^{-1} \{Take\log 8=0.9\}}

Option: 1

0.6914


Option: 2

0.2303


Option: 3

0.66597


Option: 4

0.7284


Answers (1)

best_answer

Asper unit of rate constant is \mathrm{min ^{-1}} so it must be a first order reaction

\mathrm{ k \times t=2.303 \log A_0 / A t }

I min 20 \% activated so;

\mathrm{ A_0=100 \quad A_t=80 \, \mathrm{in} / \mathrm{min} }
\mathrm{ \begin{aligned} & k \times 1=2.303 \times \log \frac{100}{80} \\\\ & k=2.303 \times \log 10-\log 8 . \\\\ & k=2.303 \times(1-0.9) \\\\ & k=2.303 \times 0.1 \\\\ & k=0.2303 \end{aligned} }

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jitender.kumar

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