Mark the following statements as true or false.
(i) Ordinary hydrogen is a mixture of 75% ortho and 25% para - forms.
(ii) All the four atoms of molecule of `H_(2)O_(2)` lie in the same plane.
(iii) Hydrogen peroxide is neutral like water.
(iv) `H_(2)O_(2)` can be prepared from `BaO_(2)` but not from `MnO_(2)` and `PbO_(2)`

Options

A. (i) and (iv) - true, (ii) and (iii) - false
B. (i) and (ii) - true, (iii) and (iv) - false
C. (iii) and (iv) - true, (i) and (ii) - false
D. (i) and (iii) - true, (ii) and (iv) - false

Explanation

To determine the truth value of each statement, we will analyze them one by one.

### Step-by-Step Solution:

1. **Statement (i): Ordinary hydrogen is a mixture of 75% ortho and 25% para forms.**
- **Analysis:** Ordinary hydrogen (H₂) consists of two isotopes of hydrogen: protium (¹H) and deuterium (²H). The ortho and para forms refer to the spin states of the hydrogen nuclei. At room temperature, the distribution of ortho and para hydrogen is approximately 75% ortho and 25% para.
- **Conclusion:** This statement is **True**.

2. **Statement (ii): All the four atoms of the molecule of H₂O₂ lie in the same plane.**
- **Analysis:** In hydrogen peroxide (H₂O₂), the molecular geometry is not planar. The two hydrogen atoms and the two oxygen atoms do not lie in the same plane due to the presence of lone pairs on the oxygen atoms, which causes a bent structure.
- **Conclusion:** This statement is **False**.

3. **Statement (iii): Hydrogen peroxide is neutral like water.**
- **Analysis:** Hydrogen peroxide (H₂O₂) is not neutral; it is slightly acidic. It can react with bases to form salts, indicating that it has acidic properties, unlike water, which is neutral.
- **Conclusion:** This statement is **False**.

4. **Statement (iv): H₂O₂ can be prepared from BaO₂ but not from MnO₂ and PbO₂.**
- **Analysis:** Hydrogen peroxide can indeed be prepared from barium peroxide (BaO₂) through a reaction with acids. However, it can also be prepared from manganese dioxide (MnO₂) and lead dioxide (PbO₂) under specific conditions. Therefore, the statement that it cannot be prepared from MnO₂ and PbO₂ is incorrect.
- **Conclusion:** This statement is **False**.

### Final Answers:
- (i) True
- (ii) False
- (iii) False
- (iv) False