A) Heat of vaporization,
B) Vapour pressure at the same temperature
C) Boiling points
D) Gaseous densities at the same temperature and pressure
Correct Answer: D
Solution :
In\[C{{H}_{3}}C{{H}_{2}}OH,\]there is intermolecular H-bonding while it is absent in isomeric ether\[C{{H}_{3}}CO{{H}_{3}}\]. Larger heat is required to vaporise\[C{{H}_{3}}C{{H}_{2}}OH\]as compared to\[C{{H}_{3}}OC{{H}_{3}}\]thus (a) is incorrect. \[C{{H}_{3}}C{{H}_{2}}OH\]is less volatile than\[C{{H}_{3}}OC{{H}_{3}},\]thus vapour pressures are different, thus (b) is incorrect. Boiling point of\[C{{H}_{3}}C{{H}_{2}}OH>C{{H}_{3}}OC{{H}_{3}},\]thus is incorrect. \[Density=\frac{mass}{volume},\]due to ideal behaviour at a given temperature, pressure, volume and molar mass are same. Hence, they have same vapour density.
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