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NTA Abhyas JEE Main2020ChemistryHaloalkanes and HaloarenesPractice

Arrange the following compounds in decreasing order of their boiling points ( i ) C H 3 C l ( i i ) C H 3 C H 2 C l ( i i i ) C H 3 C H 2 C H 2 C l ( i v ) C H 3 C H 2 C H 2 C H 2 C l

Options

  1. A(iii) > (iv) > (i) > (ii)
  2. B(iv) > (iii) > (ii) > (i)
  3. C(i) > (iii) > (ii) > (iv)
  4. D(i) > (ii) > (iii) > (iv)

Correct answer

B. (iv) > (iii) > (ii) > (i)

Step-by-step solution

Boiling point of the given compounds decreases in the following order as when molecular weight decreases magnitude of Van der Waal's forces also decreases so boiling point also decreases. C H 3 C H 2 C H 2 C H 2 C l > C H 3 C H 2 C H 2 C l > C H 3 C H 2 C l > C H 3 C l

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