why are sour substances used to clean tarnished metallic vessels?

Asked by  | 21st Mar, 2008, 02:23: PM

Expert Answer:

sour substances are acids, it reacts with the layer exposing and is tarnished inner fresh metal with lusture  is seen later.

Answered by  | 23rd May, 2008, 09:08: AM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.