The tarnished layer of silver amalgam consists of________________?
Correct answer: B. Sulphides of silver
- A. Oxides of tin
- B. Sulphides of silver
- C. Chlorides of tin
- D. All of the above
Explanation
The characteristic tarnish of silver-containing amalgam is mainly due to formation of silver sulfide, which produces a dark surface film. Tin oxides and chlorides may occur among broader corrosion products, but they are not the best answer for the named silver tarnish layer.
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