Science, asked by khalidahmad7385, 10 months ago

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.; A. I; B. II; C. III; D. IV(All India - 2011)

Answers

Answered by babundkumar45

3

Answer:

C. III

Explanation:

When acetic acid (CH3COOH) is added to sodium bicarbonate (NaHCO3) solution, and a burning splinter is brought near the mouth of each test tube, then the splinter would be extinguished due to the evolution of carbon dioxide (CO2) gas from the test tube. Therefore, student should add accetic acid to sodium bicarbonate solution.

CH3COOH + NaHCO3→ CH3COONa + H2O + CO2

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