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First Order Reaction

Phosphorescen...

Question

Phosphorescence is the phenomenon observed when light passing through a substance gets absorbed and the substance continues to emit light and glow even in the dark when the light source is cut off. Which of the following is a phosphorescent substance?

A

Gems

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B

Zinc sulphide

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C

Diamond

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D

Silver chloride

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Solution

The correct option is B Zinc sulphide
Zinc sulphide $(Z n S)$ due to impurities exhibits strong phosphorescence on illumination with due or $U V$ light.

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