Non sulphonated hard bakelites are not used for making _______________________?
Correct answer: A. Ion-exchange resins
- A. Ion-exchange resins
- B. Fountain pen barrels
- C. Formica table tops
- D. Combs
Explanation
Ion-exchange resins require sulphonated phenol-formaldehyde resin, whereas non-sulphonated hard bakelite is used for items such as combs, pen barrels and Formica laminates. Hence it is not used for ion-exchange resins.
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