Question

Which of the following is more soluble in water at 298 K?

• A. HCHO
• B. Vinylchloride
• C. Argon
• D. CO\(_2\)

Hint:

The solubility of molecules in water increases with their polarity and ability to hydrogen bond. Look for polar compounds that can interact with water molecules.

Answer 1

The Correct Option is A

At 298 K, the solubility of gases in water is influenced by their polarity and ability to form hydrogen bonds. Among the options: - HCHO (formaldehyde): It is a polar molecule and can form hydrogen bonds with water, making it highly soluble in water. - Vinylchloride: This compound is only slightly polar and does not form strong interactions with water, making it less soluble. - Argon: This is a noble gas and is essentially non-polar, making it poorly soluble in water. - CO\(_2\): While can CO\(_2\) dissolve in water, it forms weak interactions, and its solubility is lower compared to HCHO. Thus, HCHO (formaldehyde) is the most soluble in water at 298 K.