[Campbell Biology P.108] Which of the following statements accurately describes the molecula... | Practice Question

Which of the following statements accurately describes the molecular geometry and bonding characteristics as presented in Figure 4.3?

  • A: Methane has a planar structure due to its single bonds.
  • B: Ethane consists of two non-overlapping tetrahedral groups.
  • C: Ethene's carbon atoms are joined by a double bond, resulting in a flat molecule with all atoms in the same plane.
  • D: In all organic molecules, carbon atoms form four single covalent bonds leading to a tetrahedral shape.

Explanation

Figure 4.3 illustrates that methane CH4 is tetrahedral with single bonds, and ethane C2H6 consists of two overlapping tetrahedrons. However, ethene C2H4 has a carbon-carbon double bond, and all atoms attached to these carbons are in the same plane, making the molecule flat. Therefore, option C accurately describes ethene.