1.

If the half life period for a reaction in A is 100 min . How long will it take [A] to reach 25 % of its initial concentration ?

Answer»

50 MIN
250 min
200 min
500 min

Solution :( C) K `= (0.693)/(100) = 6.93 xx10^(-3)`
` t= (2.303)/(6.93xx10^(-3)) "LOG" ([A]_(0))/(0.25[A]_(0))`
`= (2.303)/(6.93xx10^(-3))"log"4`
`= (2.303)/(6.93xx10^(-3))xx0.6020`
=200 min


Discussion

No Comment Found

Related InterviewSolutions