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9. Hydricarbon — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry9. Hydricarbon1 Mark
MCQ
In paraffins, with the increasing molecular weight, it is found that
  • A
    Freezing point decreases
  • B
    Boiling point decreases
  • ✓
    Boiling point increases
  • D
    Vapour pressure decreases
✓

Answer

Correct option: C.
Boiling point increases
c
(c) Paraffins are non-polar compounds. The intermolecular forces are weak Vander Waal’s forces. As the molecular mass increases Vander Waal’s forces increases. Hence boiling point increases.

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