A first order reaction is 50% completed in 1.26 ×10¹⁴s. How much time would it take for 100% completion?

A. 1.26 ×10¹⁵s

B. 2.52 ×10¹⁴s

C. 2.52 ×10²⁸s

D. Infinite

Kindly go through the solution 

$K=A.e^{-Ea/RT}=\left(6.5\times 10^2\right)e^{-26000K/T}$

$\frac{Ea}{8.314}=26000$

Ea = 216.164kJ/mol $\cong$ $$ 216

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Reaction Kinetics, also known as chemical kinetics, is the study of the rate of chemical reaction and the factors affecting the reaction rate, such as temperature, concentration, and catalyst.