Q30 of 56 Page 1

A student added acetic acid to test tubes I, II, III and IV containing the labeled substances and then brought a burning splinter near the mouth of each test tube.


The splinter would be extinguished when brought near the mouth of test tube.

When acetic acid is added to NaHCO3 solution, and when a burning splinter is brought near the mouth of each test tube, the splinter would be extinguished due to the evolution of carbon dioxide gas from the test tube.

CH3COOH + NaHCO3 CH3COONa + H2O + CO2

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