Question: The correct order of the first ionization enthalpies is :
$\mathrm{Ti}<\mathrm{Mn}<\mathrm{Zn}<\mathrm{Ni}$
$\mathrm{Ti}<\mathrm{Mn}<\mathrm{Ni}<\mathrm{Zn}$
$\mathrm{Mn}<\mathrm{Ti}<\mathrm{Zn}<\mathrm{Ni}$
$\mathrm{Zn}<\mathrm{Ni}<\mathrm{Mn}<\mathrm{Ti}$
Correct Option: , 2
Solution:
I.E. increases on moving left to right in a period.
$\therefore \mathrm{Ti}<\mathrm{Mn}<\mathrm{Ni}<\mathrm{Zn}_{\text {, }}$
