Classification Of Elements And Periodicity In Properties Ques 28
28. Which of the following does not represent the correct order of the properties indicated [1997]
(a) $Mn^{2+}>Fe^{2+}>Cr^{2+}>Ni^{2+}$ (size)
(b) $Sc>Ti>Cr>Mn($ size)
(c) $Mn^{2+}>Fe^{2+}<Co^{2+}<Ni^{2+}$ (unpaired electron)
(d) $Fe^{2+}>Co^{2+}>Ni^{2+}>Cu^{2+}$ (unpaired electrons)
Show Answer
Solution:
- (a) In a period on moving from left to right ionic radii decreases.
So order of cationic radii is $Ni^{2+}>Fe^{2+}>Mn^{2+}>Cr^{2+}$
BETA
