The reaction of benzyl chloride with sodium hydroxide primarily follows the SN1 mechanism due to the stability of the benzyl carbocation formed during the reaction.

The reaction of 1-chloropropane with potassium tert-butoxide favors elimination, leading to the formation of propene as the major product.

The compound C4H9Br corresponds to 1-bromobutane, as it has a straight-chain structure with the bromine on the first carbon.

The correct IUPAC name is 1-bromo-2-methylpropane, as the longest carbon chain has three carbons and the bromine is on the first carbon.

The reaction of 1-bromopropane with sodium hydroxide in ethanol proceeds via the SN2 mechanism due to the primary nature of the substrate, allowing for a backside attack.

The reaction between 1-bromopropane and sodium hydroxide in ethanol proceeds via the SN2 mechanism due to the primary nature of the alkyl halide, allowing for a direct nucleophilic attack.

The E2 elimination of 2-bromobutane primarily yields 2-butene as the product due to the formation of a double bond between the second and third carbons.

SN2 reactions result in inversion of configuration at the carbon center where the nucleophile attacks, leading to a stereochemical change.

E2 elimination reactions require the leaving group and the hydrogen to be in an anti-periplanar arrangement, leading to the formation of the alkene.

Sodium hydroxide is a strong nucleophile that can effectively participate in SN2 reactions due to its hydroxide ion.

SN1 reactions are favored by tertiary substrates due to the stability of the carbocation formed, while SN2 reactions are favored by primary substrates.