Iat IiserChemical KineticsIAT (IISER) 2020MCQ+4 / -12020A first-order reaction is found to have a half-life of one second (sec). What will be the time required for $99.9 \%$ completion of the reaction?A 0.693 secB 2 secC 10 secD 69.3 secCheck AnswerClear SelectionReveal AnswerShow Explanation