Which statement is wrong for NO

Options

A. It is anhydride of nitrous acid
B. Its dipole moment in 0.22 D
C. it forms dimer
D. It is paramagnetic

Explanation

To determine which statement is wrong for nitric oxide (NO), we will analyze the provided statements step by step.

### Step 1: Analyze the First Statement
**Statement 1:** "It is an N-hydride of nitrous oxide."

- **Explanation:** Nitrous oxide (N2O) is a different compound than nitric oxide (NO). The term "N-hydride" typically refers to compounds that contain hydrogen and nitrogen, such as hydrazine (N2H4) or ammonia (NH3). NO does not fit this definition as it does not contain hydrogen. Therefore, this statement is incorrect.

### Step 2: Analyze the Second Statement
**Statement 2:** "Dipole moment is 0.22 D and it forms a dimer."

- **Explanation:** The dipole moment of NO is indeed around 0.22 D, indicating that it has a polar bond due to the difference in electronegativity between nitrogen and oxygen. Additionally, NO does form a dimer, specifically dinitrogen tetroxide (N2O4), under certain conditions. This statement is correct.

### Step 3: Analyze the Third Statement
**Statement 3:** "The structure of NO has nitrogen double bonded to oxygen, with nitrogen having one lone pair and one unpaired electron."

- **Explanation:** The structure of NO consists of a nitrogen atom double bonded to an oxygen atom. The nitrogen atom has one lone pair of electrons and one unpaired electron, which contributes to its paramagnetic nature. This statement is correct.

### Step 4: Analyze the Fourth Statement
**Statement 4:** "It is paramagnetic due to the presence of an unpaired electron."

- **Explanation:** This statement is true. The presence of an unpaired electron in the molecular orbital of NO makes it paramagnetic, which means it is attracted to magnetic fields.

### Conclusion
The wrong statement regarding nitric oxide (NO) is the first statement: "It is an N-hydride of nitrous oxide."