
\begin{tabular}{|c|c|}
\hline Q. 139 & \begin{tabular}{l}
Orange juice is packaged aseptically and stored under ambient conditions. The \\
degradation of vitamin $\mathrm{C}$ in the juice occurs during storage and it follows first \\
order reaction kinetics. The degradation rate constant is $5.2 \times 10^{-3}$ day $^{-1}$. The half- \\
life of vitamin $\mathrm{C}$ in days is _ (in integer).
\end{tabular} \\
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\end{tabular}