Which of the following is a thermosetting polymer?

💡 Solution & Explanation

Bakelite is a synthetic thermosetting phenol-formaldehyde polymer that undergoes irreversible cross-linking upon heating, rendering it incapable of being remelted. In contrast, thermoplastics like polythene, PVC, and nylon can be repeatedly softened and reshaped through thermal processing. Bakelite was one of the earliest plastics synthesized entirely from artificial components.