Correct Answer: Option D

Explanation

- Iron sulfide reacts with hydrochloric acid, releasing hydrogen sulfide: FeS + 2HCl → FeCl\(_2\) + H\(_2\)S.

- 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.

• The question: A boat sails for 30km on a bearing of 145 degree,then 10km on a bearing of 250 degree... Answer this

  0 Answers   ·   Mathematics   ·   2 hours ago
• My jamb score is 175 and I want to study biotechnology in imo state university I don't know if I... Answer this

  0 Answers   ·   3 hours ago
• cultural weed controls methods? Answer this

  0 Answers   ·   Agricultural Science   ·   3 hours ago