Question

What is rate constant of a first order reaction having half life \(138.6 \text{ minute}\)?

• A. \(5.0 \text{ minute}^{-1}\)
• B. \(0.54 \text{ minute}^{-1}\)
• C. \(0.25 \text{ minute}^{-1}\)
• D. \(0.005 \text{ minute}^{-1}\)

Hint:

First order: \(t_{1/2} = 0.693/k\) → directly use for quick calculation.

Answer 1

The Correct Option is D