wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Question 13
Silver articles become black on prolonged exposure to air. This is due to the formation of:
(a) Ag3N
(b) Ag2O
(c) Ag2S
(d) Ag2S and Ag3N

Open in App
Solution

Option (c) is correct.

Tarnishing of silver refers to thin coating of silver sulphide bring formed on the surface of silver. Silver is not appreciably affected by dry or moist air. The presence of hydrogen sulphide in the surroundings is one of the major reasons for silver tarnish. It reacts with the silver to form silver sulphide, which is black in colour. The reaction involved is:

2Ag(s)+H2S(g)Ag2S(s)+H2(g)


flag
Suggest Corrections
thumbs-up
34
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon