Which one of the following statement regardings `BF_(3)` is not correct ?

Options

A. it is a Lewis acid
B. it is an ionic compound
C. it is an electron deficient compound
D. it forms adducts

Answer

To determine which statement regarding BF3 is not correct, we will evaluate each of the provided statements one by one.

### Step 1: Analyze the first statement - "It is a Lewis acid."
- **Explanation**: BF3 is known to act as a Lewis acid because it can accept a pair of electrons. In BF3, boron has an incomplete octet and can accept electron pairs from Lewis bases.
- **Conclusion**: This statement is correct.

### Step 2: Analyze the second statement - "It is an ionic compound."
- **Explanation**: BF3 is not an ionic compound; it is a covalent compound. In BF3, boron and fluorine are bonded through covalent bonds, and there is no complete transfer of electrons that would characterize ionic bonding.
- **Conclusion**: This statement is incorrect.

### Step 3: Analyze the third statement - "It is an electron deficient compound."
- **Explanation**: BF3 is indeed an electron deficient compound because boron has only six electrons in its valence shell, making it electron deficient and capable of accepting electron pairs.
- **Conclusion**: This statement is correct.

### Step 4: Analyze the fourth statement - "It forms edX."
- **Explanation**: BF3 can dimerize to form a compound known as B2F6 (often referred to as edX), which helps it achieve stability by sharing electron pairs between boron atoms.
- **Conclusion**: This statement is correct.

### Final Conclusion:
The statement that is not correct regarding BF3 is: **"It is an ionic compound."**

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