Question

which one of these would be a gas at room temperature? koh nacl mgcl₂ so₂

Explanation:

• \(KOH\) (potassium hydroxide) is a solid at room temperature. It has a high melting point due to its ionic structure.
• \(NaCl\) (sodium chloride) is also a solid. It forms a crystalline lattice structure typical of ionic compounds, which gives it a relatively high melting point.
• \(MgCl_{2}\) (magnesium chloride) is a solid. Ionic compounds like \(MgCl_{2}\) have strong electrostatic forces between ions, resulting in solid - state at room temperature.
• \(SO_{2}\) (sulfur dioxide) has a relatively low molar mass and weak intermolecular forces (dipole - dipole forces). These characteristics allow it to exist as a gas at room temperature.

Answer:

\(SO_{2}\)