PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free Demo1. Why do we store silver chloride in dark coloured bottles?
Silver chloride is a compound that decomposes easily in a process. It quickly reacts with light, losing its property and producing silver and chlorine gas. So silver chloride is stored in dark coloured bottles.
2. A silver article generally turns black when kept in the open for a few days. The article when rubbed with toothpaste again starts shining.Name the black substance formed and give its chemical formula.
The silver article turns black when kept in the air because the silver article reacts with sulphur compounds such as present in the air.
\(2Ag\) + \(H_2S\) → \(Ag_2S\) + \(H_2\)
The phenomenon is called corrosion. It is called tarnishing of silver.
The black substance formed is sulphide.
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