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What is ebonite classified as?

1. A type of natural rubber
2. A form of synthetic rubber
3. A rubber that is extensively vulcanized
4. A variety of polypropylene

Correct answer: A rubber that is extensively vulcanized

Solution

Ebonite is classified as a rubber that is extensively vulcanized, which means it has undergone a high degree of cross-linking to produce a hard, rigid material with unique properties.

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