Silver articles become black after some time when exposed to air becau – McqOptions

MCQOPTIONS

1.	Silver articles become black after some time when exposed to air because
A.	silver gets oxidized to silver oxide
B.	silver reacts with moist carbon dioxide in the air to form silver carbonate
C.	silver reacts with sulphur in the air to form a coating of silver sulphide
D.	silver reacts with nitrogen oxides in the air to form silver nitrate
Answer» D. silver reacts with nitrogen oxides in the air to form silver nitrate

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