Question
Download Solution PDFA boy breaks the glass of an electric bulb and found the filament is made up of tungsten, the chemical symbol represents this element is -
Answer (Detailed Solution Below)
Option 3 : W
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ST 1: B.Ed. Common Entrance (Teaching Aptitude)
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Detailed Solution
Download Solution PDFCONCEPT
- Electric bulb: It is an electric device which converts electric energy into heat and light energy.
- it is generally made of glass with inert gases filled in it (Nitrogen and argon).
- The filament is made of tungsten which has a very high melting point.
EXPLANATION
- Tungsten is a transition metal.
- Its atomic number is 74 with sign 'W' as Tungsten or wolfram
- The melting point of this element is very high but get oxidised at high temperature.
- So, to protect this element from getting oxidised it is kept in a container filled with inert gases.
Ti - Titanium, atomic number - 22.
Sn - Tin or stannum, atomic number - 50
Te - Tellerium, Atomic number -52
⇒ Option 3 is correct.
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