It becomes acid gold
Just gold and nitric acid. Gold's impervious to nitric acid.
No
With a strong acid, like muratic acid used to clean concrete. Gold will be unaffected by the acid. However if it's gold plated or a gold alloy (not 24K gold) it will react to the acid.
The 2011 50 dollar gold proof is pure 14mm 24k .9999 gold
Gold react with aqua regia not with hydrochloric acid.
Gold don't react with sulphuric acid.
Provided it is yellow, put it in nitric acid. If not huing the acid, that is pure gold in contact with the acid
=stainless steel=
what acid do you use to test gold
Nothing happens. Gold will not react with sulfuric acid.
Gold can be turned into a variety of gold compounds. Most easily it can be turned into chloroauric acid by immersing it in aqua regia, a mixture of hydrochloric acid and nitric acid.