Chemical Kinetics Question 4
Question 4 - 25 January - Shift 1
For the first order reaction $A \to B$ Br the half life is $30 mm$. The time taken for $75 %$ completion of the reaction is mm. (Nearest mteger)
Given : $\log 2=0.3010$
$\log 3=0.4771$
$\log 5=0.6989$
Show Answer
Answer: (60)
Solution:
$t _{1 / 2}=T _{50}=30 min$
$T _{75}=2 t _{1 / 2}=30 \times 2=60 min$