MHT CET202519 Apr 2025Evening ShiftChemistryAlcohols Phenols and EthersActual
Which from following compounds is least soluble in water at STP?
Options
- AC ₂ H ₅ OH
- BCH ₃ OH
- CCH ₃ NH ₂
- DCH ₄
Correct answer
D. CH ₄
Step-by-step solution
The solubility of substances in water is determined by their ability to form hydrogen bonds and interact with the polar solvent. Ethanol ( C ₂ H ₅ OH ) and methanol ( CH ₃ OH ) contain hydroxyl groups that form strong hydrogen bonds with water. Methylamine ( CH ₃ NH ₂ ) has an amino group capable of hydrogen bonding with water molecules. Methane ( CH ₄ ) is nonpolar with only weak London dispersion forces and cannot form hydrogen bonds, making it the least soluble compound. Among these, methane exhibits the lowest