Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature.
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Question context
This question is part of ⚗️ Chemical Engineering within the broader 🛠️ Engineering Essentials subject and appears in the DemoPaper-Pakistan preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.