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JEE Main2014ChemistryChemical Bonding and Molecular StructureActual

The number and type of bonds in C 2 2 - ion in CaC 2 are:

Options

  1. ATwo σ -bonds and two π -bonds
  2. BOne σ -bond and two π -bonds
  3. COne σ -bond and one π -bond
  4. DTwo σ -bonds and one π -bond

Correct answer

B. One σ -bond and two π -bonds

Step-by-step solution

The structure of calcium carbide is: Ca 2 + C ≡ C 2 - Both C atoms are sp hybridised. The carbide anion, having 2 units of negative charge between two carbon atoms, has 1   σ and 2   π bonds.

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