Silver tarnish is caused by the formation of silver sulfide (Ag₂S) through the reaction of silver with hydrogen sulfide in the air.
Silver articles turn black when kept in the open for longer time due to the formation of
Asked in UPSC CDS 2 2020 · Topic: Metals, Minerals, Ores: Properties, Uses (Corrosion of metals: causes, mechanism (rusting), and prevention methods (galvanization, anodizing, electroplating, alloying, painting))
More Chemistry questions
- When copper reacts with moist carbon dioxide (CO₂) in air, it forms a green coating of which one of the following compounds ?
- Example of corrosion is
- Rusting of iron is :
- Aluminium surfaces are often 'anodized', this means the deposition of a layer of :
- Given below are two statements : Statement I : Rusting of Iron is a chemical change. Statement II : The process of depositing a layer of Zinc on Iron is called galvanisation. In the light of the above statements, choose the most appropriate answer from the options given below :
- Which one of the following elements corrodes rapidly?
- On exposure to moist air, copper gains a green coat on its surface due to formation of which one of the following compounds ?
- Zinc is used to protect iron from corrosion because zinc is