Q. An organic compound X of molecular formula C₂H₄O₂gives brisk effervescence with sodium hydrogen carbonate. Give the name and formula of X.

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Solution

Because the compound gives brisk effervescence on reacting with NaHCO₃, therefore the compound is a carboxylic acid. Also, its chemical formula suggests that it is a carboxylic acid with two carbon atoms. Thus, the compound is ethanoic acid (or carboxylic acid) and its chemical formula is CH₃COOH. Following is the chemical equation for the reaction
CH₃COOH + NaHCO₃ â†’ CH₃COONa + H₂O + CO₂

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C_{2} H_{4} O_{2}

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C_{2} H_{4} O_{2}

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Q. Which of the following will give brisk effervescence with sodium hydrogen carbonate and why?
CH₃COOH, CH₃CH₂OH

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Q. An organic compound X of molecular formula C2H4O2 gives brisk effervescence with sodium hydrogen carbonate. Give the name and formula of X.

Q. An organic compound X of molecular formula C₂H₄O₂gives brisk effervescence with sodium hydrogen carbonate. Give the name and formula of X.