A gas H2S evolves.
When calcium sulphide reacts with hydrochloric acid, it forms calcium chloride and hydrogen sulphide gas. The balanced chemical equation for the reaction is CaS + 2HCl → CaCl2 + H2S. Hydrogen sulphide gas being released gives off a rotten egg smell.
produce
Hydrogen
Iron sulphide slowly dissolves in acid giving Hydrogen sulphide gas and a dirty green solution along with a burning sulpher smell. FeS + 2HCl ---------> FeCl2 + H2S
Silver sulphide dissolves in strong acids like sulphuric acid and nitric acid. It however does not dissolve in hydrochloric acid.
I goes all gloppy and odd
There is very strong hydrochloric acid in the stomach. It is a good experiment to see what happens to milk by adding strong hydrochloric acid.
It reacts
Nothing happens. They don't react.
A gas H2S evolves.
Nothing
it turns in to a zombie