The half-life of a first order reaction with k value 6.93 x 1014 s-1 is

10-15 s-1 1015 s 10-15 s 1013 s

10-15 s

For first order reaction, half life time, t1/2 = \(\frac{0.693}{k}\) = \(\frac{0.693}{6.93 × 10^{14}}\) = 10-15 s