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Question

State what you would observe when: Dilute hydrochloric acid is added to zinc sulphide.


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Solution

  • When dilute hydrochloric acid is added to zinc sulphide, a colourless gas with a foul smell like rotten egg is evolved i.e. H2S (Hydrogen sulphide gas).
  • ZnS(s)Zincsulphide+2HCl(aq)HydrochloricacidZnCl2(sZincchloride)+H2SHydogensulphide
  • Conclusion: Here we observe that a colourless gas H2Sis evolved along with the formation of zinc chloride.

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