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4746. Bristles of tooth brushes are made of

September 7, 2025 by Admin

nylon-6

nylon-66

polystyrene

PVC

✅ The correct answer is option B.

Categories Chemical Engineering, Engineering, Polymer Technology MCQs Tags Chemical Engineering MCQs, Engineering MCQs, Polymer Technology MCQs

4741. Helmholtz free energy (A) is defined as

4751. Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is

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