Give reasons: (i) Mn shows the highest ...

CBSE Class 12 Chemistry 2016 Delhi Set 1 Solved Paper

Question : 17 of 26

Marks: +1, -0

Give reasons:

(i) Mn shows the highest oxidation state of +7 with oxygen but with fluorine it shows the highest oxidation state of +4 .

(ii) Transition metals show variable oxidation states.

(iii) Actinoids show irregularities in their electronic configurations.

Solution:

(i) Ability of oxygen to form multiple bond /

p \pi -

d \pi

bond.

(ii) Partially filled

d

-orbitals / due to comparable energies of

n s

and

(n-1) d

-orbitals.

(iii) due to relative stabilities of the

f, f^{7}

and

f^{4}

occupancies of the 5 -orbitals / Comparable energies of

7 s, 6 d, 5 f

-orbitals.

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