When acetylene is passed through hot iron tube at 400 oC, it gives:
Correct answer: A. Benzene
- A. Benzene
- B. Toluene
- C. O-Xylene
- D. Metaxylene
Explanation
Acetylene on passing through a red hot iron tube undergoes cyclic polymerization. Three of the acetylene molecules polymerise to form benzene.
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About Benzene and Aromatic Compounds
Benzene has a planar ring of delocalised π electrons, giving aromatic stability and equal carbon-carbon bond lengths. The topic covers resonance, electrophilic substitution reactions such as nitration, halogenation, sulphonation and Friedel-Crafts reactions, along with substituent effects and the distinction between substitution in benzene and addition in ordinary alkenes.
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