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Contact surface catalyst used in cracking furnace (vinyl chloride manufacture) within the tubes is ____________

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Contact surface catalyst used in cracking furnace (vinyl chloride manufacture) within the tubes is ____________

(a) Charcoal

(b) Anthracite

(c) Coke

(d) Lignite

I had been asked this question during an internship interview.

This question is from C2 Compounds in section Synthetic Organic Chemical Industries of Chemical Technology

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Right choice is (a) Charcoal

To explain I would say: Charcoal or pumice is used as contact surface catalyst within the tubes in tubular cracking furnace. 50% conversion and 95-96% yield are obtained.

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