Q. Pure conc. $HNO_{3}$ makes iron passive as the surface is covered with protective layer of:
A) $Fe\left( NO_{3} \right)_{3}$
B) $Fe_{3}O_{4}$
C) $FeO$
D) $Fe_{2}O_{3}$
Explanation
(b)
$\mu_{eff}$ value of 1.73 BM corresponds to one unpaired electron.
$Ti^{3 +} = 3d^{1}\ (Ti = \lbrack Ar\rbrack 3d^{2}\ 4s^{2})$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.