For an `S_(N^(2))` reaction which of the following statements are true:-

Options

A. The rate of reaction is independent of the concentration of the nucleophile
B. The nucleophile attacks the C-atom on the side of the molecule opposite to the group being displaced
C. The reaction proceeds with simultaneous bond formation and rupture
D. None of these

Answer

To determine which statements about the SN2 reaction are true, we will analyze each statement carefully.

### Step-by-Step Solution:

1. **Statement 1: The rate of reaction is independent of the concentration of the nucleophile.**
- **Analysis:** In an SN2 reaction, the rate of reaction is dependent on the concentrations of both the alkyl halide and the nucleophile. This is because the reaction involves a single step where both reactants collide. Therefore, this statement is **false**.

2. **Statement 2: The nucleophile attacks the carbon atom on the side of the molecule opposite to the group being displaced.**
- **Analysis:** In an SN2 mechanism, the nucleophile indeed attacks the carbon atom from the side opposite to the leaving group (the halide). This leads to an inversion of configuration at the carbon center. Thus, this statement is **true**.

3. **Statement 3: The reaction proceeds with simultaneous bond formation and rupture.**
- **Analysis:** The SN2 reaction occurs in a single concerted step where the bond between the leaving group (halide) and the carbon atom weakens as the nucleophile forms a new bond with the carbon atom. This simultaneous bond formation and bond breaking is characteristic of the SN2 mechanism. Therefore, this statement is **true**.

4. **Statement 4: None of the above.**
- **Analysis:** Since we have identified that statements 2 and 3 are true, this statement is **false**.

### Conclusion:
The true statements regarding the SN2 reaction are:
- Statement 2: The nucleophile attacks the carbon atom on the side of the molecule opposite to the group being displaced.
- Statement 3: The reaction proceeds with simultaneous bond formation and rupture.