Silver articles become black when kept in open for some time

Silver articles become black when kept in open for some time, whereas copper vessels lose their shiny brown surfaces and gain a green coat when kept in open. Name the substances present in air with which these metals react and write the name of the products formed. 

Answer

Silver - sulphur in air - Silver sulphide

Copper - Moisture & Carbon dioxide - Copper Carbonate

• Exam Year: 2019