Chemical Kinetics Question 192

Question: 75% of a first order reaction was completed in 32 minutes when was 50% of the reaction completed [AMU 1999; Kerala (Med.) 2003]

Options:

A) 16 min.

B) 24 min.

C) 8 min.

D) 4 min.

Show Answer

Answer:

Correct Answer: A

Solution:

k=2.303tlog(aax)

k=2.30332log(10010075) .- (i) k=2.303tlog(10010050) -.(ii) from the two equation (i) and (ii), t=16 minutes.



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