Question

The time taken-for 90% Of a first-order reaction to complete is approximately

a. 1.1 times that of half life

b. 2.2 times that of half life
c. 3.3 times that of half life
d. 4.4 times that of half life

Answer 1

1st Order Reaction

$t=\frac{2.303}{k}log\frac{100}{10}$

$t=\frac{2.303}{k}$

$t=3.3\times \frac{0.693}{k}$

$t=3.3\times t_{1/2}$

So, Option C is correct