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Match the following aspects with the respective metal.
Aspects Metal
(a) The metal which reveals a maximum number of oxidation states (i) Scandium
(b) The metal although placed in 3d block is considered not as a transition element (ii) Copper
(c) The metal which does not exhibit variable oxidaiton states (iii) Manganese
(d) The metal which in +1 oxidation state in aqueous solution undergoes disproportionation (iv) Zinc
Select the correct option:

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(a)-(ii) (b)-(iv) (c)-(i) (d)-(iii)

(a)-(i) (b)-(iv) (c)-(ii) (d)-(iii)

(a)-(iii) (b)-(iv) (c)-(i) (d)-(ii)

(a)-(iii) (b)-(i) (c)-(iv) (d)-(ii)

answer is A.

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Detailed Solution

In 3d-series, Manganese reveals maximum number of oxidation states i.e., (+2 to +7)
Zinc atom has completely filled d-orbitals in its ground state as well as in its oxidised state, hence it is not regarded as a transition element.
Scandium shows only one oxidation state i.e., +3.
${Cu}^{+}$ undergoes disproportionation reaction in aqueous solution

$2 {Cu}^{+} (aq) ⟶ {Cu}^{2 +} (aq) + Cu (s)$

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