The hybrid orbitals used by the underlined atoms in CH₂CHCHO,from left to right,respectively,are A)sp³ and sp². B)sp² and sp². C)sp² and sp. D)sp and sp. E)sp³ and sp.

Question

Quizplus · Accepted Answer

The underlined atoms in CHS1U1B12S1U1B0CHCHO are the first carbon (C1) and the second carbon (C2). 
C1 is bonded to one sulfur (S1U1B1) and two hydrogen atoms (H), which leads us to the conclusion that it has three hybrid orbitals. One of these hybrid orbitals is used with the single bond to S1U1B1, and the other two are used with the double bond to C2 and the single bond to H. Therefore, C1 has spS1U1P12S1S1P0 hybrid orbitals.
C2 is bonded to two oxygen atoms (O) and one hydrogen atom (H), which means it also has three hybrid orbitals. One of these hybrid orbitals is used with the double bond to C1, and the other two are used with the two single bonds to O and H. Therefore, C2 also has spS1U1P12S1S1P0 hybrid orbitals.

The Hybrid Orbitals Used by the Underlined Atoms in CH2CHCHO,from

The Hybrid Orbitals Used by the Underlined Atoms in CH₂CHCHO,from