Question

For a first order reaction, half life is 10 min. The % of reaction that will be completed in 1.67 hr is 90% B 95% C 9.99% D 99.9%​

Answer 1

Answer:

D

Explanation:

time given is much greater than the half life almost all the reaction must have been completed

Answer 2

Answer:

D 99.9%

Explanation:

1.67 hrs have 100.2 minutes

so reaction will be halved 10 times

100 50 25 12.5 6.25 3.125 1.5625 0.78125 0.390625 0.1953125 0.09765625

So, 100-0.09765625 = 99.902