Read the following passage and answer questions. Nucleophiles attack at that part of the substrate molecule which is electron deficient. The reaction in which a nucleophile replaces already existing nucleophile in a molecule is called nucleophilic substitution reaction. Haloalkanes are substrates in these reactions. In this type of reaction, a nucleophile reacts with haloalkane (the substrate) having a partial positive charge on the carbon atom bonded to halogen. A substitution reaction takes place and halogen atom, called leaving group departs as halide ion. Since the substitution reaction is initiated by a nucleophile, it is called nucleophilic substitution reaction. |
When NaOH reacts with R-X, what is the major product? |
Alcohol Ether Ester Acid |
Alcohol |
The correct answer is Option (1) → Alcohol NaOH provides OH⁻ ion which acts as a nucleophile. In nucleophilic substitution: R–X + OH⁻ → R–OH + X⁻ OH⁻ attacks the carbon bonded to halogen and replaces the halide ion. This results in the formation of alcohol. Option 1: Alcohol - OH⁻ replaces halogen (X⁻). Product formed is R–OH. Option 2: Ether - Requires alkoxide ion (RO⁻). Not formed here. Option 3: Ester - Requires acid derivative. Not possible. Option 4: Acid- Not formed in this reaction. |