(i) The oxidation of the hydroboration product with hydrogen peroxide (H2O2) and hydroxide (OH−) leads to the formation of a diol. The main product will be (CH3–CH2–CH2–CH2OH), 1-propanol.
(ii) Phenol (C6H5OH) reacts with aqueous NaOH to form phenoxide ion (C6H5O−). When phenol reacts with CO2 in the presence of H+, it undergoes carboxylation to form salicylic acid (2-hydroxybenzoic acid).
Main product: Salicylic acid (C6H4(OH)COOH)