Final answer:
c. AlF₃; Sp₂. The statement 'AlF₃; Sp²' is not true as aluminum in AlF₃ does not typically exhibit sp² hybridization in its ionic form.
Step-by-step explanation:
The student asked which of the following is not true with respect to the central atom's hybridization:
- BF₃; Sp²
- NH₃; Sp³
- AlF₃; Sp²
- PF₃; Sp³
The correct hybridizations for the given molecules are:
AlF₃ is an ionic compound and the aluminum ion typically exhibits an electron configuration without hybridization in the solid state. However, in some coordination complexes, aluminum can be sp² hybridized. Nonetheless, this is not the case for simple ionic compounds like AlF₃. Therefore, the statement c. AlF₃; Sp² is not true, since aluminum does not adopt sp₂ hybridization in AlF₃.