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प्रश्न
Name the compound used in black and white photography. State whether the reaction that occurs is exothermic or endothermic. Give justification for your answer.
औचित्य
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उत्तर
Photography in black and white uses silver chloride. It is an endothermic process. Photodecomposition is the process by which silver chloride breaks down into silver and chlorine after absorbing sunlight.
\[\ce{2AgCl ->[Sunlight] 2Ag + Cl2}\]
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