Q. 125.0( 2 Votes )

It has been notic

Answer :

Pollution of the environment has lead to an increase in sulphur present in the air. Now, since sulphur is readily available, silver reacts with it and thus becomes black:

2Ag + H2S (present in air) Ag2S + H2


The black coating is of Ag2S. Fifty years ago, the air was less polluted so was the amount of sulphur in the air and thus less sulphur was available for reacting with silver jewellery.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses