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Ultra violet mercury lamp is made of quartz and not glass because

$(a)\;\text{quartz is harder than glass} \\(b)\;\text{to prevent it to become hot.} \\(c)\;\text{quartz is transparent} \\(d)\;\text{quartz absorbs ultraviolet ray.} $
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Ultra violet mercury lamp is made of quartz as it is transparent to ultraviolet light.
Hence c is the correct answer.
answered Mar 19, 2014 by meena.p
 

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