QJEEM13Chcbab: JEE Main 2013 Chemistry - Class 12 JEEM13Chcbab Solution: Which of the following arrangements does not represent the…

Question

Verified Solution • 2025–26 Session moderate

Which of the following arrangements does not represent the correct order of the property stated against it?

Accepted Answer

(1)

hence the correct order of paramagnetic behaviour

{V^{2 + }} &lt; Cr{}^{2 + } = F{e^{2 + }} &lt; M{n^{2 + }}

(2)

\,\,\,\,

For the same oxidation state, the-ionic radii generally

dc

-creases as the atomic number increases in a particular transition series.

Hence the order is

M{n^{ + + }} &gt; F{e^{ + + }} &gt; C{o^{ + + }} &gt; N{i^{ + + }}

(3)

In solution, the stability of the compounds depends upon electrode potentials,

SEP

of the transitions metal ions are given as

C{o^{3 + }}/Co = + 1.97,\,\,\,F{e^{3 + }}/Fe = + 0.77;

C{r^{3 + }}/C{r^{2 + }} = - 0.41,\,\,S{c^{3 + }}

is highly stable as it does not show

+2

O.

S.

(4)

Sc - \left( { + 2} \right),\left( { + 3} \right)

Ti - \left( { + 2} \right),\left( { + 3} \right),\left( { + 4} \right)

Cr - \left( { + 1} \right),\left( { + 2} \right),\left( { + 3} \right),\left( { + 4} \right),\left( { + 5} \right),\left( { + 6} \right)

Mn - \left( { + 2} \right),\left( { + 3} \right),\left( { + 4} \right),\left( { + 5} \right),\left( { + 6} \right),\left( { + 7} \right)

i.e.\,Sc &lt; Ti &lt; Cr = Mn

{E_a} = 53598.6J/mol

= 53.6\,kJ/mol.

Step-by-Step Verified Solution