RRB Paramedical Staff Nurse Model Paper 3

Question : 96 of 100

Marks: +1, -0

The boiling point of methanol, water and dimethyl ether are respectively 65° C, 100° C and 34.50° C Which of the following best explains these wide variations in b.p.?

The molecular mass increases from water (18) to methanol (32) to diethyl 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 $1.00 gml^{−1}$ , methanol $0.7914 gml^{−1}$ and that of diethyl ether is $0.7137gml^{−1}$

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