Which of the following metal (shown by its symbol) is generally used for making filaments of bulb?

Options

A. Fe
B. An
C. Ag
D. W

Answer

D

Explanation

Tungsten, a chemical element with symbol W, is used in incandescent light bulb filaments, X-ray tubes (as bot the filament and target), eletrodes in TIG welding, supealloys, and radiation shielding. It has the highest melting point of all the element discovered, melting at `3422^(@)` (`6192^(@)F`, 3695K). It also has the second highest boiling point, at `5930^(@)C`.