Question

What happens when-
(1)Silver article is kept in the open for few days.
(2)copper nitrate undergoes heating.
(3)Aluminium metal is added to dilute hydrochloric acid.
(4)Molten NACL is electrolysed.
(5)Iron sulphate reacts with zinc metal

Answer 1

increase points please

Answer 2

1) becomes black bcoz of sulphur obsorbed by atmosphere
2)becomes reddish brown bcoz whrn it is heated h2o molecules vapours.
3)al plus hcl - alcl plus h2
4)cloride converts bubbles out
5) no reaction bcoz of by displacement reactions