Statement 1 is correct. Silver articles tarnish and turn black over time when exposed to air. Statement 2 is correct. This discoloration is primarily due to a chemical reaction with hydrogen sulfide gas present in the atmosphere, forming a layer of silver sulfide (Ag₂S) on the surface of the silver.
With reference to ‘Silver articles’, which of the following statements is/are correct ? 1. Silver articles turn black after some time when exposed to air. 2. It happens due to coating of silver sulphide. Select the correct answer from the code given below : Code :
Asked in uppsc 2025 2025 · Topic: Metals, Minerals, Ores: Properties, Uses (Corrosion of metals: causes, mechanism (rusting), and prevention methods (galvanization, anodizing, electroplating, alloying, painting))
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