Question

Choose the correct option(s) regarding following hydrogen halides:

• A. $HF$ is gas at room temperature
• B. $HF$ is liquid at room temperature
• C. $HCl$ is solid at room temperature
• D. $HCl$ is gas at room temperature

Answer 1

Answer: (B), (D)

$HCl$ is gas at room temperature

Hydrogen fluoride is liquid (b.p. $293K$) due to strong hydrogen bonding.​ Other hydrogen halides that have bigger size and less electronegativity are gases.​