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Chemistry

Chemistry · Fundamental Principles of Organic Chemistry

Work through this past-paper style MCQ, then read the full explanation. Practice more chemistry questions on mMCQ with adaptive practice and topic analytics.

Question

Which of the following does not have sp2 hybridized orbitals?

Options
  • A

    Acetone

  • B

    Acetonitrile

  • C

    Acetic acid

  • D

    Acetamide

Explanation

Acetonitrile has a carbon-nitrogen triple bond. The carbon atom in the triple bond is sp hybridized, with one sigma bond to nitrogen and two pi bonds to nitrogen.

Acetone has a carbonyl group, which is a carbon-oxygen double bond. The carbon atom in the carbonyl group is sp2 hybridized, with one sigma bond to oxygen and two sigma bonds to hydrogen atoms.

Acetonitrile has a carbon-nitrogen triple bond. The carbon atom in the triple bond is sp hybridized, with one sigma bond to nitrogen and two pi bonds to nitrogen.

Acetic acid also has a carbonyl group, so the carbon atom in the carbonyl group is sp2 hybridized. The other carbon atom in acetic acid is sp3 hybridized, with three sigma bonds to hydrogen atoms and one sigma bond to the carbonyl carbon.

Acetamide has a carbonyl group and an amide group. The carbon atom in the carbonyl group is sp2 hybridized, and the nitrogen atom in the amide group is sp2 hybridized. The other carbon atom in acetamide is sp3 hybridized, with three sigma bonds to hydrogen atoms and one sigma bond to the carbonyl carbon.

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Tagged under Chemistry · Fundamental Principles of Organic Chemistry