The boiling points of methanol, water and dimethyl ether are respectively 65ºC, 100ºC and…
Chemistry · JEE Main · NTA Exams — Chemical Bonding and Molecular Structure
The boiling points of methanol, water and dimethyl ether are respectively 65ºC, 100ºC and 34.5ºC. Which of the following best explains these wide variations in b.p. ?
- The molecular mass increases from water (18) to methanol (32) to diethy ether (74)
- The extent of H-bonding decreases from water to methanol while it is absent in ether
- The extent of intramolecular H-bonding decreases from ether to methanol to water
- The density of water is 1.00 g mL–1, methanol
0.7914 g mL–1 and that of diethyl ether is 0.7137 g mL–1
Answer
(B) The extent of H-bonding decreases from water to methanol while it is absent in ether
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