• # question_answer Which among the following will change with respect to time for a first order reaction? (I) Rate of reaction (II) Rate constant (III)Half-life A)  (I) only                       B)  (III) onlyC)  (I) and (II) only           D)  (II) and (III) only

Rate constant varies with temperature only and ${{t}_{1/2}}$is the rate constant dependent. Hence, the correct option is [b].