Question:
Which from following compounds is least soluble in water at STP?
Which from following compounds is least soluble in water at STP?
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Hydrocarbons are non-polar and hydrophobic (water-fearing).
Updated On: May 15, 2026
- $\text{C}_2\text{H}_5\text{OH}$
- $\text{CH}_3\text{OH}$
- $\text{CH}_3\text{NH}_2$
- $\text{CH}_4$
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The Correct Option is D
Solution and Explanation
Step 1: Concept Solubility in water generally depends on the ability to form hydrogen bonds or the polarity of the molecule.
Step 2: Meaning "Like dissolves like": polar/H-bonding solutes dissolve in polar water.
Step 3: Analysis Methanol, ethanol, and methylamine are all polar and can form hydrogen bonds with water. Methane ($\text{CH}_4$) is a non-polar hydrocarbon.
Step 4: Conclusion Methane has no polar groups and cannot form H-bonds, making it the least soluble in water. Final Answer: (D)
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