Haloalkanes and HaloarenesmediumMCQ SINGLE

According to documented standard physical state trends, which of the following sets exclusively contHaloalkanes and Haloarenes Chemistry Question

Question

According to documented standard physical state trends, which of the following sets exclusively contains organohalogen compounds that exist naturally as colourless gases at standard room temperature and standard atmospheric pressure?

Answer: A

💡 Solution & Explanation

At standard room temperature ($25^\circ C$), the lowest members of the aliphatic haloalkanes—specifically methyl chloride ($CH_3Cl$), methyl bromide ($CH_3Br$), and ethyl chloride ($C_2H_5Cl$), alongside select chlorofluorocarbons—are gases. As molecular mass increases, the strengthening London dispersion forces condense the substances into liquids (e.g., methyl iodide, ethyl bromide, chloroform, chlorobenzene) and eventually into solids (e.g., iodoform, highly polyhalogenated arenes).

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