Question

How have they solved this acute problem? into passive

Answer 1

Explanation:

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.