Why silver chloride is used in photochromic spectacles ? (1) Silver halides darken in light owin...
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Why silver chloride is used in photochromic spectacles ?
(1) Silver halides darken in light owing to photochemical decomposition
(2) Silver halides produced elemental silver in light.
(3) If the halogen produced is kept in close proximity to finely divided silver chloride, the silver metal is
\( \mathrm{P} \) formed.
(4) All of these.
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