Butan-1-ol (CH3CH2CH2CH2OH) is only partially miscible with water at 25 °C. Which structural modification to the molecule would most increase its miscibility with water?
a) Replacing the hydroxyl group with chloride to form 1-chlorobutane
b) Branching the carbon chain to form tert-butanol (2-methyl-2-propanol)
c) Extending the carbon chain to form hexan-1-ol
d) Oxidizing the alcohol to a ketone to form 2-butanone