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Q.

When acetylene passed through red hot Fe tube hybridization of C changes from _ to _

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a

sp, sp3d

b

sp2 sp3

c

sp, sp2

d

sp2, sp

answer is B.

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Detailed Solution

  • Acetylene on passing through red hot iron tube at 873K undergoes cyclic polymerization. 
  • Three of the acetylene molecules polymerize to form benzene. 
  • This is the best route for entering from aliphatic to aromatic compounds.
  • Hybridization of each carbon atom in Acetylene is sp and that of carbon atoms in benzene is sp2.
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