In which transformation the change of hybridization and shape about underlined atom take place ?

Options

A. `ul(C)H_3CH_3rarrul(C)H_3^(-)+CH_3^(+)`
B. `NH_3+ul(B)F_3rarr[H_3N^+rarrbarul(B)F_3]`
C. `H_2ul(O)+H^+rarrH_3ul(O)^+`
D. `ul(N)H_3+H^+rarrul(N)H_4^(+)`

Answer

The question seems to be about identifying a transformation in which there is a change in hybridization and shape of an atom. Let's break down the solution step-by-step.

### Step-by-Step Solution:

1. **Understanding Hybridization**:
- Hybridization refers to the mixing of atomic orbitals to form new hybrid orbitals, which can then be used to form bonds in molecules. The type of hybridization can affect the shape of the molecule.

**Hint**: Recall the common types of hybridization: sp, sp², sp³, etc., and their corresponding shapes.

2. **Identifying the Atom in Question**:
- The question mentions an "underlined atom." To answer the question, we need to identify which atom is being referred to and its current hybridization state.

**Hint**: Look for the context in which the atom is mentioned in the question or any accompanying diagrams.

3. **Analyzing the Transformation**:
- A transformation that involves a change in hybridization typically occurs during reactions such as:
- Addition reactions (e.g., alkenes to alkanes)
- Elimination reactions (e.g., alkanes to alkenes)
- Coordination complex formation (where ligands can change the hybridization of the central atom)

**Hint**: Think about common reactions in organic chemistry that lead to changes in hybridization.

4. **Determining the New Hybridization and Shape**:
- After identifying the transformation, determine the new hybridization state of the atom and the resulting molecular shape. For example, if an sp² hybridized atom undergoes a reaction to become sp³ hybridized, the shape would change from trigonal planar to tetrahedral.

**Hint**: Use VSEPR theory to predict the shape based on the new hybridization.

5. **Conclusion**:
- Summarize the findings by stating the specific transformation that leads to the change in hybridization and shape of the underlined atom.

**Hint**: Make sure to clearly state both the initial and final hybridization states and the corresponding shapes.

### Final Answer:
The transformation that leads to a change in hybridization and shape about the underlined atom can be identified as a specific type of reaction (e.g., addition, elimination, or coordination). The exact answer will depend on the context provided in the question regarding the atom and the reaction it undergoes.