2 Answers

Ethyne is passed through a hot tube containing organo-nickel…

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Ethyne is passed through a hot tube containing organo-nickel catalyst to produce

A. Isoprene

B. polythene

C. ethanol

D. benzene

QUICK ANSWER…

D

DETAILS…

During a process called cyclic polymerization, ethyne is passed through red hot iron tube to produce benzene. As you can see, the formula for ethyne is C₂H₂, and that of benzene is C₆H₆, polymerizing or tripling the molecule of ethyne gives benzene. This reaction can be catalyzed by the aforementioned.

Now for the right answer to the above question:

  1. Option A is incorrect. isoprene is a monomer of natural rubber and not a product of ethyne polymerization.
  2. Option B is incorrect. polythene is a polymer of ethene (C₂H₄) and not ethyne (C₂H₂).
  3. C is incorrect. Ethanol, not produced through this way.
  4. D is the correct answer. Benzene, in a way, is a polymer of ethyne.

KEY-POINTS…

You may please note these/this:

  • Cyclic polymerization involves the combination of three units of ethyne (aka acetylene), to form benzene.

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/ culled from 2015 JAMB-UTME Chemistry past question 37 /

Ethyne is passed through a hot tube containing organo-nickel... » QuizTablet
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