Time required to decompose `SO_2 Cl_2` to half of its initial amount is 40 minutes. If the decomposition is a first order reaction, What will be the rate constant of the reaction?

Options

A. `2.88 xx10^(-4) s^(-1)`
B. `2.88xx10^(-2) s^(-1)`
C. `1.73 xx 10^(-2) s^(-1)`
D. `1.73 xx 10^(-4) s^(-1)`