Question

What will be the half-life of the first order reaction for which the value of rate constant is $200s^{-1}$?

• A. $3.46\times {10}^{-2}s$
• B. $3.46\times {10}^{-3}s$
• C. $4.26\times {10}^{-2}s$
• D. $4.26\times {10}^{-3}s$

Answer 1

The correct option is B $3.46\times {10}^{-3}s$

$Given:k=200s^{-1}$

$t_{1/2}=\frac{0.693}{k}=\frac{0.693}{200}=3.46\times {10}^{-3}s$.