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← ScienceWhich outcome occurs when concentrated sulfuric acid contacts solid potassium chloride?
A)Hydrogen chloride gas is released✓
B)Potassium sulfate rapidly decomposes
C)Chlorine gas undergoes spontaneous condensation
D)No observable reactions occur
💡 Explanation
Hydrogen chloride gas evolves, because strong acids displace weaker, volatile acids through Bronsted-Lowry acid-base chemistry. This reaction overcomes stable ionic bonds because sulfuric acid donates protons, therefore HCl gas evolves from the mixture rather than decomposition or inert behavior.
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