Appeared in: 2025 (2 sets)
If the half-life period of a first order reaction is $1386\text{ s}$, then the rate constant of this reaction is :
(A) $0.5 \times 10^{-2}\text{ s}^{-1}$
(B) $0.5 \times 10^{-3}\text{ s}^{-1}$
(C) $5 \times 10^{-2}\text{ s}^{-1}$
(D) $5 \times 10^{-3}\text{ s}^{-1}$