Classification of Elements and Periodicity in Properties - Result Question 34
####34. Which of the following does not represent the correct order of the properties indicated [1997]
(a) $Ni^{2+}>Cr^{2+}>Fe^{2+}>Mn^{2+}$ (size)
(b) $Sc>Ti>Cr>Mn($ size)
(c) $Mn^{2+}>Ni^{2+}<Co^{2+}<Fe^{2+}$ (unpaired electron)
(d) $Fe^{2+}>Co^{2+}>Ni^{2+}>Cu^{2+}$ (unpaired electron)
Show Answer
Solution:
- (a) In a period on moving from left to right ionic radii decreases.
So order of cationic radii is $Cr^{2+}>Mn^{2+}>Fe^{2+}>Ni^{2+}$
