NEET · Chemistry · STD 12 - 4. d and f- block elements
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 \(3 d\) block is considered not as a transition element | \((ii)\) Copper |
| \((c)\) The metal which does not exhibit variable oxidation states | \((iii)\) Manganese |
| \((d)\) The metal which in \(+1\) oxidation state in aqueous solution undergoes disproportionation | \((iv)\) Zinc |
- A \((a)-(ii) (b)-(iv) (c)-(i) (d)-(iii)\)
- B \((a)-(i) (b)-(iv) (c)-(ii) (d)-(iii)\)
- C \((a)-(iii) (b)-(iv) (c)-(i) (d)-(ii)\)
- D \((a)-(iii) (b)-(i) (c)-(iv) (d)-(ii)\)
Answer & Solution
Correct Answer
(C) \((a)-(iii) (b)-(iv) (c)-(i) (d)-(ii)\)
Step-by-step Solution
Detailed explanation
In 3 d-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
\(2 Cu ^{*}( aq ) \longrightarrow Cu ^{2+}( aq )+ Cu ( s )\)
\((+2\) 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
\(2 Cu ^{*}( aq ) \longrightarrow Cu ^{2+}( aq )+ Cu ( s )\)
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