Which of the following alcohols is least solu | vedclass

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(A) The solubility of alcohols in water depends on the balance between the hydrophilic hydroxyl $(-OH)$ group and the hydrophobic alkyl chain. As the

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Pentan-$1$-ol

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(A) The solubility of alcohols in water depends on the balance between the hydrophilic hydroxyl $(-OH)$ group and the hydrophobic alkyl chain. As the size of the hydrophobic alkyl chain increases,the solubility of the alcohol in water decreases. All the given alcohols are isomers with the molecular formula $C_5H_{12}O$. However,the solubility also depends on the branching of the alkyl chain. Increased branching reduces the surface area of the hydrophobic part,which generally increases solubility. Comparing the structures: $1$. Pentan-$1$-ol (straight chain,$5$ carbons) $2$. $2$-methyl butan-$2$-ol (branched,$5$ carbons) $3$. Pentan-$2$-ol (branched,$5$ carbons) $4$. $2,2$-Dimethyl propan-$1$-ol (highly branched,$5$ carbons) Among these,Pentan-$1$-ol has the longest straight alkyl chain,which makes it the least soluble in water compared to the more branched isomers.

Which of the following alcohols is least soluble in water?

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