Arrange the following compounds in decreasing order of their boiling points: \(NH_3\), HF, \(SiH_4\), \(CH_4\)

Chemistry

WAEC 2023

A. HF,\(NH_3\), \(SiH_4\), \(CH_4\)
B. \(CH_4\), \(SiH_4\), HF, \(NH_3\),
C. \(NH_3\),\(CH_4\), \(SiH_4\), HF
D. \(CH_4\), \(SiH_4\), \(NH_3\), HF

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Correct Answer: Option A

Explanation

The correct order of boiling points of the compounds \(NH_3\), HF, \(SiH_4\), and \(CH_4\) is HF, \(NH_3\), \(SiH_4\), \(CH_4\).
The correct order of boiling points of the compounds \(NH_3\), HF, \(SiH_4\), and \(CH_4\) is HF, \(NH_3\), \(SiH_4\), \(CH_4\).

The boiling point of a compound is the temperature at which the vapor pressure of the liquid is equal to the atmospheric pressure. The stronger the intermolecular forces, the higher the boiling point.

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