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Write the chemical equation involved in the following chemical reactions:
(i) White washing.
(ii) Black and white photography.

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(i) In white washing, quicklime reacts with water to from slaked lime.
`underset("Quick lime")(CaO+H_(2)O) rarr underset ("Slacked lime")(Ca(OH)_(2)+"Heat")`
(ii) Silver bromide, when exposed to light decomposes to to silver and bromine.
`underset ("Silver bromide")(2AgBr(s)) overset ("Sunlight") rarr underset("Silver")(2Ag(s))+ underset("Bromine")(Br_(2)(g))`
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