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Study of Compounds - Hydrogen Chloride — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryStudy of Compounds - Hydrogen Chloride1 Mark
MCQ
Gas liberated when hydrochloric acid reacts with galena.
  • A
    Sulphur dioxide
  • B
    Carbon dioxide
  • C
    Nitrogen
  • D
    Hydrogen sulphide
✓

Answer

D. Hydrogen sulphide
Explanation: Galena is also known as lead glance or lead sulphide. When lead sulphide reacts with dilute hydrochloric acid, it produces $PbCl _2$ as salt and hydrogen sulphide as gas. Which has a smell of rotten eggs. The balance reaction can be represented as:
$PbS+2 HCl \rightarrow PbCl_2+H_2 S(\uparrow)$
Lead Hydrogen Lead Hydrogen
sulphide sulphide chloride chloride

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