Indiscriminate disposal of used fluorescent electric lamps causes mercury pollution in the environment. Why is mercury uses in the manufacture of these lamps?

A mercury coating on the inside of the lamp makes the light bright white

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When the lamp is switched on, the mercury in the lamp causes the emission of ultra-violet radiations

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When the lamp is switched on, it is the mercury which converts the ultra-violet energy into visible light

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None of the statements given above is correct about the use of mercury in the manufacture of fluorescent lamps

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Solution

The correct option is B When the lamp is switched on, the mercury in the lamp causes the emission of ultra-violet radiations
Option:(b)

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