Which metal is used generally for the filament of electric bulbs?
Correct answer: D. W
- A. Pt
- B. Fe
- C. Cu
- D. W
Explanation
Tungsten (W) is used in bulbs because of its physical properties like high melting point compared to other options and apt resistivity to produce glow light in the bulb.
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About Electronic Structure of d-Block Elements
The electronic structure of d-block elements covers the filling of the (n-1)d and ns orbitals, general electronic configurations, and the exceptions shown by chromium and copper. It explains how partially filled d orbitals produce variable oxidation states, coloured ions, magnetic behaviour and complex formation, while distinguishing transition elements from elements with completely filled d subshells.
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