A student separately warms 1-chlorobutane, 1-bromobutane, and 1-iodobutane with aqueous silver nitrate in ethanol.
Which statement correctly identifies the halogenoalkane that reacts the fastest, the correct explanation for this rate, and the observation of the precipitate formed?
1-chlorobutane reacts the fastest because the C–Cl\text{C–Cl}C–Cl bond is the most polar; a white precipitate is formed.
1-iodobutane reacts the fastest because the C–I\text{C–I}C–I bond has the lowest bond enthalpy; a yellow precipitate is formed.
1-iodobutane reacts the fastest because the C–I\text{C–I}C–I bond is the most polar; a cream precipitate is formed.
1-bromobutane reacts the fastest because the C–Br\text{C–Br}C–Br bond has the lowest bond enthalpy; a cream precipitate is formed.