Exposure of certain metals to sunlight may lead to photochemical reactions, causing oxidation or corrosion. Ultraviolet (UV) radiation can accelerate these processes, affecting the appearance and properties of the metal.
A metal X is obtained from its chloride salt by exposure to sunlight. (a) In which section of the reactivity series of metals- top, middle or bottom, is it likely to be placed? Justify your answer. (b) Identify the type of reaction the chloride salt of metal X undergoes on exposure to sunlight.
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(a) The fact that a metal X is obtained from its chloride salt by exposure to sunlight suggests that the metal X is likely to be placed towards the top of the reactivity series of metals. Metals towards the top of the reactivity series are more reactive, and they often require more energetic methods (such as exposure to sunlight or heat) to extract them from their compounds.
(b) The type of reaction that the chloride salt of metal X undergoes on exposure to sunlight is likely to be a photochemical reaction. Photochemical reactions involve the absorption of light energy to bring about a chemical change. In this case, exposure to sunlight induces a reaction in the chloride salt, leading to the formation of the metal X.
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