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GK QUESTION#3257

Assertion (A): Each carbon atom in acetylene (C₂H₂) undergoes sp² hybridization. Reason (R): Acetylene contains a triple bond between the two carbon atoms.

  1. ABoth A and R are true, and R is the correct explanation of A.
  2. BBoth A and R are true, but R is not the correct explanation of A.
  3. CA is true, but R is false.
  4. DA is false, but R is true.Correct answer
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Answer

D. A is false, but R is true.

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Explanation

Acetylene, HC≡CH, contains a carbon–carbon triple bond. Each carbon is sp-hybridised and has a linear local geometry. The triple bond comprises one sigma and two pi bonds. Thus the assertion assigning sp² hybridisation is false, and the reason is true.

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