Answer: Tungsten (W).
- A Tungsten (W)
- B Iron
- C Molybdenum
- D Nickel
Correct answer: A. Tungsten (W)
Explanation: Tungsten has the highest melting point of all metals (3422°C) and can withstand filament temperatures without melting.
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.