Home
Class 12
CHEMISTRY
At least how many half-lives should elap...

At least how many half-lives should elapse for a `1^(st)` order reaction `Ato` products so that the reaction is at least `95%` completed?
`(log2=0.3)`

A

4

B

5

C

6

D

7

Text Solution

Verified by Experts

The correct Answer is:
B
`underset(0%)(100)overset(t_((1)/(2)))tounderset(50%)(50)overset(t_((1)/(2)))tounderset(75%)(25)overset(t_((1)/(2)))to`
`underset(87.5%)(12.5)overset(t_((1)/(2)))tounderset(93.75%)(6.25)overset(t_((1)/(2)))tounderset(96.875%)(3.125)`
Promotional Banner

Similar Questions

Explore conceptually related problems

At least how many thermal neutrons should be available to strat a fission reaction

How many half-lives are needed to complete the zeroth order reaction ?

Half life of a first order reaction in 10 min. What % of reaction will be completed in 100 min ?

75% of the first order reaction completed in 3 min. 50% of the reaction was completed in

A first order reaction is 60% complete in 20 min. How long will the reaction take to be 84% complete?

The half-life period or a first order reaction is 1 hrs. What is the time in hour taken for 87.5% completion of the reaction?

Half life of a first order reaction is 69.3 minutes. Time required to complete 99.9% of the reaction will be :

Rate constant of a first order reaction, A to Product is 0.016" min"^(-1) . Calculate the time required for 80% of the reaction to be completed.

90% of a first order reaction was completed in 100 min .What is the half life of the reaction ?