Chapter 4

NCERT
Class 10
Science
Solutions
7. How can ethanol and ethanoic acid be differentiated on the basis of their physical and chemical properties?

Question:

How can ethanol and ethanoic acid be differentiated on the basis of their physical and chemical properties?

Answer:

Difference in physical properties :

Ethanol Ethanoic acid
(i) It has a specific smell. (i) It smells like vinegar.
(ii) Its boiling point is 351 K. (ii) Its boiling point is 391 K.
(iii) Its melting point is 150K. (iii) Its melting point is 290 K.

Difference in chemical properties :

Ethanol         Ethanoic acid
(i) It does not react with
sodium carbonate.
(i) It reacts with sodium carbonate and
forms sodium salt and CO2 gas.
(ii) In the presence of basic KMnO4, it forms
ethanoic acid, due to which KMnO4
becomes colorless.
Image
(ii) It does not react in the presence of basic KMnO4,
Due to which KMnO4 retains its original color.

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