Which pairing is correct?a.ethyne - sp hybridizedb.ethene - sp hybridizedc.ethane - sp3 hybridizedd.toluene - sp hybridized

1. ### Break Down the Problem

We need to analyze the hybridization of the given compounds: ethyne, ethene, ethane, and toluene, and identify which pairing is correct.

2. ### Relevant Concepts

The hybridization of a molecule can be determined based on its geometry and bonding:

• sp Hybridization: Linear geometry, 180° bond angles (e.g., ethyne).
• sp² Hybridization: Trigonal planar geometry, 120° bond angles (e.g., ethene).
• sp³ Hybridization: Tetrahedral geometry, 109.5° bond angles (e.g., ethane).
• Toluene contains a benzene ring, which can be considered sp² hybridized due to the presence of double bonds in the aromatic structure.

3. ### Analysis and Detail

1. Ethyne (C₂H₂):

   • Hybridization: sp
   • Geometry: Linear.

2. Ethene (C₂H₄):

   • Hybridization: sp²
   • Geometry: Trigonal planar.

3. Ethane (C₂H₆):

   • Hybridization: sp³
   • Geometry: Tetrahedral.

4. Toluene (C₇H₈):

   • Hybridization: sp² (due to the aromatic ring).

4. ### Verify and Summarize

• Ethyne - sp hybridized (correct)
• Ethene - sp² hybridized (incorrect)
• Ethane - sp³ hybridized (correct)
• Toluene - sp² hybridized (incorrect)

Based on this analysis, the only correct pairing for the options listed is:

• Ethyne - sp hybridized.

Final Answer

The correct pairing is a. ethyne - sp hybridized.