1.

When a vessel is exposed to moist air for a long time,then a green coating is formed on its surface.The vessel must be made of : (a) zinc (b) magnesium (c) iron (d) copper

Answer»

When a vessel is exposed to moist air for a long time,then a green coating is formed on its surface.The vessel must be made of :

(a) zinc

(b) magnesium

(c) iron

(d) copper



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