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QJEEM24Ch9710: JEE Main 2024 Chemistry - Class 12 JEEM24Ch9710 Solution: The element which shows only one oxidation state other than its …
The element which shows only one oxidation state other than its elemental form is :
Multiple Choice Options
- A Nickel
- B Titanium
- C Cobalt
- D Scandium
Step-by-Step Verified Solution
The element among the given options that shows only one oxidation state other than its elemental form is Scandium.
Explanation:
- Nickel (Ni) can have multiple oxidation states, including +2 and +3, with +2 being the most common.
- Titanium (Ti) also shows various oxidation states, most commonly +4 and +2, due to its ability to lose electrons from both its 3d and 4s subshells.
- Cobalt (Co) commonly exists in the +2 and +3 oxidation states, among others, due to electron transitions in its 3d orbitals.
- Scandium (Sc), however, primarily exhibits a +3 oxidation state in its compounds (excluding its 0 state in the elemental form). This is because scandium has an electronic configuration of [Ar]3d14s2, and it loses all three outer electrons to achieve a stable configuration, resulting in a +3 oxidation state. It does not commonly exhibit other oxidation states because removing more than three electrons would require removing electrons from the very stable noble gas core configuration ([Ar]), which is energetically unfavorable.
Therefore, the correct answer is Option D: Scandium.