Dative Bond is present in :-

Options

A. `KI_(3)`
B. `KNO_(2)`
C. `KHF_(2)`
D. All

Answer

To determine where a dative bond is present among the given options, we need to analyze each compound. A dative bond, also known as a coordinate bond, occurs when one atom donates both electrons to form a covalent bond.

### Step-by-Step Solution:

1. **Analyze KI3:**
- KI3 consists of potassium (K) and iodine (I).
- Potassium (K) donates one electron to form K⁺.
- In KI3, iodine forms a covalent bond with another iodine atom, and one of the iodine atoms donates a pair of electrons to form a bond with K⁺.
- Therefore, KI3 contains a dative bond.

2. **Analyze K and O2:**
- K and O2 consists of potassium (K) and molecular oxygen (O2).
- In this case, K loses an electron to become K⁺, and O2 forms a double bond between the two oxygen atoms.
- There is no atom donating both electrons to form a bond with K⁺, so there is no dative bond present in K and O2.

3. **Analyze KHF2:**
- KHF2 consists of potassium (K), hydrogen (H), and fluorine (F).
- Potassium (K) donates one electron to become K⁺.
- HF forms a covalent bond between H and F, but there is no dative bond present in this compound either, as there is no pair of electrons donated by one atom to another.

4. **Conclusion:**
- From the analysis, we find that only KI3 contains a dative bond.
- Therefore, the correct answer is option A (KI3).

### Final Answer:
Dative bond is present in **KI3**.

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