Question

Give the chemical name and chemical formulae of the following:
(a) A reddish brown deposit formed on iron nail on exposure to damp air
(b) A greenish layer formed on copper articles on long exposure to air.
(c) A blackish tinge formed on silver vessels
(ii) Also mention condition/conditions necessary for their formation in each case.
(iii) Name the process involved and define it.
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Answer 1

Answer:

sorry I can't give my intro

Answer 2

Chemical Name and Chemical Formula for the following are given below:

Explanation:

a) When iron nail is exposed to damp air for a significant time period reddish-brown crumbling substance called Rust ($Fe_{2}Ox_{3}$) starts forming.

b) When exposed to moist air for a significant time period copper articles form greenish layer on them due to Corrosion. It forms a mixture of copper hydroxide ($Cu(OH)_{2}$ ) and  copper carbonate ($CuCO_{3}$).

c) When silver vessels are exposed to air for a considerable period of time it reacts with hydrogen sulphide to form blackish tinge on it called Silver Sulphide ($Ag_{2}S$).