3 questions from 2026
In the following reaction sequence, \( Q \), \( R \), \( S \) and \( T \) are the major products.
The correct statement(s) about Q, R, S and T is(are)
Natural rubber on complete ozonolysis \( \left(\mathrm{O_3/Zn - H_2O}\right) \) gives compound \( X \) as the major product. \( X \) gives positive iodoform and Tollen’s tests. \( X \) on heating with aqueous \( \mathrm{NaOH} \) gives \( Y \) as the major product. \( Y \) is:
The List-II contains products obtained from the reaction of compounds in List-I with \( \mathrm{O_3} / \mathrm{Zn} - \mathrm{H_2O} \) followed by cyclization (via more stable enolate) in the presence of aqueous \( \mathrm{NaOH} \).Match each entry in List-I with appropriate entry in List-II and choose the correct option.
