For a reaction, the rate constant is 0.693× 10-1min-1 and initial concentration is 0.2 mol/L. Half-life period will be

Question

For a reaction, the rate constant is 0.693× 10-1min-1 and initial concentration is 0.2 mol/L. Half-life period will be (A) 400 s (B) 600 s (C) 800 s (D) 100 s

Tardigrade Admin · Accepted Answer

Velocity constant =0.693× 10-1min-1 =(0.693× 10-1/60)s-1 Initial concentration = 0.2 mol/L This is first order reaction. It does not depend on initial concentration. Half-life =(0.693× 60/0.693× 10-1) =600s

Q. For a reaction, the rate constant is $0.693 \times 10^{- 1} mi n^{- 1}$ and initial concentration is 0.2 mol/L. Half-life period will be

400 s

600 s

800 s

100 s

Velocity constant $= 0.693 \times 10^{- 1} mi n^{- 1}$ $= \frac{0.693 \times 10 ^{- 1}}{60} s^{- 1}$ Initial concentration = 0.2 mol/L This is first order reaction. It does not depend on initial concentration.
Half-life $= \frac{0.693 \times 60}{0.693 \times 10 ^{- 1}}$ $= 600 s$

Q. For a reaction, the rate constant is 0.693×10−1min−1 and initial concentration is 0.2 mol/L. Half-life period will be