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4. Chemical bonding and molecular structure — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry4. Chemical bonding and molecular structure1 Mark
MCQ
The high boiling point of ethanol $({78.2\,^o}C)$ compared to dimethyl ether$( - {23.6\,^o}C)$, though both having the same molecular formulae ${C_6}{H_6}O$, is due to
  • ✓
    Hydrogen bonding
  • B
    Ionic bonding
  • C
    Coordinate covalent bonding
  • D
    Resonance
✓

Answer

Correct option: A.
Hydrogen bonding
a
Even though the ethanol and dimethyl ether contains same molecular formula $C _2 H _6 O$, ethanol contains the boiling point $78.2$ degree centigrade while dimethyl ether contains the boiling point $-23.6$ degree centigrade because of the presence of hydrogen bonding in ethanol where as the hydrogen bonding is absent in di methyl ether.

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