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Question

Which of the following arrangements does not represent the correct order of the property stated against it?
  1. V2+<Cr2+<Mn2+<Fe2+: Paramagnetic behavior
  2. Ni2+<Co2+<Fe2+<Mn2+: Ionic size
  3. Co3+<Fe3+<Cr3+<Sc3+: Stability in aqueous solution
  4. Sc<Ti<Cr<Mn: Number of oxidation states

A
Sc<Ti<Cr<Mn: Number of oxidation states
B
Co3+<Fe3+<Cr3+<Sc3+: Stability in aqueous solution
C
V2+<Cr2+<Mn2+<Fe2+: Paramagnetic behavior
D
Ni2+<Co2+<Fe2+<Mn2+: Ionic size
Solution
Verified by Toppr

Greater is the number of unpaired electrons, greater is the paramagnetic behavior.
V=3d34s2;V2+=3d3=3 unpaired electrons

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Similar Questions
Q1
Which of the following arrangments does not represent the correct order of the property stated against it?
(1) V2+<Cr2+<Mn2<Fe2+ : paramagnetic behaviour
(2) Ni2+<Co2+<Fe2+<Mn2+ : ionic size
(3) Co3+<Fe3+<Cr3+<Sc3+ : stability in aqueous solution
(4) Sc<Ti<Cr<Mn : number of oxidation states
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Q2
Consider the ions Fe2+,Fe3+,Cr2+,Cr3+,Mn2+,Mn3+. Strongest oxidizing ion is ?
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Q3

The d - electron configurations of Mn2+, Fe2+, Co3+, and Ni2+ are 3d5, 3d6, 3d6, 3d8, respectively. Which of the following aqua complexes will exhibit the minimum paramagnetic behavior?


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Q4
Consider the ions Fe2+,Fe3+,Cr2+,Cr3+,Mn2+,Mn3+. Strongest reducing ion is ?
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Q5
For M2+/M and M3+/M2+ systems the E values for some metals are as follows:
Cr2+/Cr0.9V$Cr3/Cr2+0.4V
Mn2+/Mn1.2VMn3+/Mn2++1.5V
Fe2+/Fe0.4VFe3+/Fe2++0.8V
Use this data to comment upon:
(i) the stability of Fe3+ in acid solution as compared to that of Cr3+ or Mn3+ and
(ii) the ease with which iron can be oxidised as compared to a similar process for either chromium or manganese metal
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