1. Tardigrade
  2. Question
  3. Chemistry
  4. Arrange the melting points of following compounds in decreasing order 1. n-butane 2. cis-2-butene 3. trans-2-butene 4. 1-butyne

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Q. Arrange the melting points of following compounds in decreasing order

$1.$ n-butane

$2.$ cis-2-butene

$3.$ trans-2-butene

$4.$ 1-butyne

NTA AbhyasNTA Abhyas 2020Chemical Bonding and Molecular Structure

Solution:

Melting point $ \propto $ molecular weight, symmetry of the molecule

$ \propto \frac{1}{\mu }$ of the compound. $\left(\text{μ} = \text{dipole} \, \text{moment}\right)$

Hence the correct order of melting point is

1-butyne > trans-2-butene > cis-2-butene > n-butane.