`A(aq)rarrB(aq)+C(aq)` is first order reaction.
`"Time"" "t" "oo`
`"moles of reagent " " "n_(1)" "n_(2)`
Reaction prgress is measured with the help of titration of reagent 'R'. If all A, B and C react with reagent and have 'n' factors [n factor,eq. mass=`("mol.mass")/(n)` in the ratio of `1:2:3` with the reagent, the k in terms of `t, n_(1) and `n_(2)` is :

Options

A. `k=10/tln(n_(2)/(n_(2)-n_(1)))`
B. `k=1/tln.((2n_(2))/(n_(2)-n_(1)))`
C. `k=1/tln.((4n_(2))/(n_(2)-n_(1)))`
D. `k=1/tln.((4n_(2))/(5(n_(2)-n_(1))))`

Answer

D