General Science • ChemistryEasy
Which gas is released when dilute hydrochloric acid reacts with sodium carbonate?
A. Hydrogen
B. Carbon dioxide✓ Correct Answer
C. Oxygen
D. Chlorine
💡 Solution & Explanation
When dilute hydrochloric acid reacts with sodium carbonate, it undergoes a neutralization reaction that yields sodium chloride, water, and carbon dioxide gas, which produces effervescence and turns limewater milky. Reactions involving reactive metals produce hydrogen gas instead of carbon dioxide. This chemical test is commonly used in laboratories to identify carbonate and bicarbonate salts.
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