Which one of the following should have the lowest boiling point? hcl ph3 h2s c2h6 c3h7oh

Explanation:

The boiling point depends on the intermolecular forces between the molecules of the compound.

have dipole- dipole interactions because there is the difference in electronegativity values of the atoms in the molecules.

posses hydrogen bonding.

: The bond in the molecule is C-H, which is non-polar in nature because the carbon and the hydrogen having very similar electronegativity values.

The intermolecular force acting in the molecule are induced the dipole-dipole forces or London Dispersion forces / van der Waals forces which are the weakest intermolecular force.

Hence, it has the weakest bond, so it takes least amount of the energy and hence the lowest boiling point.

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the answer to this question is 3.