Answer: Zinc.
- A Manganese
- B Iron
- C Chromium
- D Zinc
Correct answer: D. Zinc
Explanation: Zn (3d<sup>10</sup>4s<sup>2</sup>) has a completely filled d subshell in its atom and common +2 ion (d<sup>10</sup>), so it is not a typical transition element.
Aqueous solutions of transition metal ions show characteristic colours caused by electrons absorbing visible light to jump between split d-orbitals; the exact colour depends on the metal, its oxidation state, and surrounding ligands.
Concept context
Transition metals (d-block) and lanthanides/actinides (f-block). Known for coloured compounds, variable oxidation states, complex formation, and catalytic properties. Frequently tested in JEE and NEET.