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Carbon and its Compounds — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceCarbon and its Compounds5 Marks
Question
  1. In tabular form, differentiate between ethanol and ethanol acid under the following heads:
  1. Physical state.
  2. Taste.
  3. $NaHCO_3$ test.
  4. Ester test.
  1. Write a chemical reaction to show dehydration of ethanol.
✓

Answer

  1.  
Property
Ethanol
Ethanoic Acid
Physical State
Ethanol is a colorless liquid with pleasant odor
Ethanoic acid is colorless, pungent smelling liquid
Taste
Ethanol is bitter to taste
Ethanoic acid is sour to taste
$NaHCO_3$ Taste
Ethanol does not react with sodium bicarbonate
When ethanoic acid reacts with sodium $NaHCO_3$ with the evolution of carbon dioxide gas.
Ester Test
Ethanol on reaction with ethanoic acid in the presence of acid forms ester.
Ethanoic acid on reaction with alcohols in the presence of conc. Sulphuric acid to form ester.
  1. Ethanol undergoes dehydration to form ethane.
$2\text{CH}_{3}\text{CH}_{2}\text{OH}\xrightarrow[\text{conc.} \text{H}_2 \text{SO}_{4}]{\Delta} 2\text{CH}_{2} = \text{CH}_{2} + \text{H}_{2}\text{O}$

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