Final answer:
Two compounds are correctly matched with their molecular geometry: methane (CH₄) with a tetrahedral structure, and carbon tetrachloride (CCl₄) also with a tetrahedral structure.
Step-by-step explanation:
The question asks for correct matches of compounds with their molecular geometries. Two pairs from the given choices correctly match a compound to its molecular geometry:
- D. Methane (CH₄): tetrahedral
- E. Carbon tetrachloride (CCl₄): tetrahedral
In methane (CH₄), the carbon atom is at the center with four hydrogen atoms symmetrically arranged at the corners of a tetrahedron, resulting in a tetrahedral molecular geometry. Similarly, in carbon tetrachloride (CCl₄), the carbon atom is at the center with four chlorine atoms occupying the corners of a tetrahedron, also resulting in a tetrahedral molecular geometry.
However, the other compounds listed (A, B, C) do not correctly match the molecular geometry to the compound. Hydrochloric acid (HCl) is linear, not trigonal planar. Water (H₂O) has a bent molecular structure, not trigonal planar. And carbon dioxide (CO₂) has a linear molecular structure, not tetrahedral as suggested in the options.