The species in which the N-atom is in a state of sp hybridisation is

Options

A. `NO_(2)^(+)`
B. `NO_(2)^(-)`
C. `NO_(3)^(-)`
D. `NO_(2).`

Explanation

To determine the species in which the nitrogen atom is in a state of sp hybridization, we need to analyze the hybridization of nitrogen in various species. Here’s a step-by-step solution:

### Step 1: Understand Hybridization
Hybridization is the concept used to explain the bonding in molecules. It involves the mixing of atomic orbitals to form new hybrid orbitals. The type of hybridization depends on the number of bond pairs and lone pairs around the central atom.

### Step 2: Identify the Species
We need to look at the given species and analyze the nitrogen atom in each case. The species mentioned are:
1. Nitrogen ion (N⁺)
2. Nitrogen dioxide (NO₂)
3. Nitrate ion (NO₃⁻)
4. Nitroxyl (NO)

### Step 3: Analyze Each Species
1. **Nitrogen Ion (N⁺)**:
- The nitrogen atom has a positive charge and typically forms two bonds (e.g., with two hydrogen atoms).
- Since there are 2 bond pairs and no lone pairs, the hybridization is **sp**.

2. **Nitrogen Dioxide (NO₂)**:
- In NO₂, nitrogen has one lone pair and forms two bonds with oxygen.
- This results in 2 bond pairs and 1 lone pair, leading to **sp² hybridization**.

3. **Nitrate Ion (NO₃⁻)**:
- In NO₃⁻, nitrogen forms three bonds with oxygen and has no lone pairs.
- This results in 3 bond pairs, leading to **sp² hybridization**.

4. **Nitroxyl (NO)**:
- In NO, nitrogen has one bond with oxygen and one unpaired electron.
- This leads to **sp² hybridization** as well, due to the presence of one bond and one lone pair.

### Step 4: Conclusion
From the analysis, the species in which the nitrogen atom is in a state of **sp hybridization** is the **Nitrogen Ion (N⁺)**.

### Final Answer
The species in which the N-atom is in a state of sp hybridization is **N⁺**.

---