What is the name of the gas liberated when diluted hydroc...
What is the name of the gas liberated when diluted hydrochloric acid is added to iron(ii)sulphide?
turns lime water milky
decolorizes bromine water
gives a pop sound
turns lead(ii)ethanoate paper black
Correct answer is D
- Iron sulfide reacts with hydrochloric acid, releasing hydrogen sulfide: FeS + 2HCl → FeCl2 + H2S.
- Hydrogen sulfide reacts with lead acetate to form lead sulfide and thus produces a coloration on the paper which will vary from yellow to black, depending upon the amount of hydrogen sulfide present.
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