Which of the following statements about `H_(2)O_(2)` is not true ?

Options

A. Both oxidising and reducing agent
B. Two hydroxyl group of `H_(2)O_(2)` lie in the same plane
C. Same structure in liquid and solid form
D. None of these

Answer

To determine which statement about hydrogen peroxide (H₂O₂) is not true, we can analyze the properties and structure of H₂O₂. Here’s a step-by-step solution:

### Step 1: Identify the Properties of H₂O₂
- Hydrogen peroxide (H₂O₂) is a chemical compound that is known for its oxidizing and reducing properties.
- It is commonly recognized as a pale blue liquid.

### Step 2: Understand the Structure of H₂O₂
- H₂O₂ has a non-planar structure, which means that the atoms do not all lie in the same plane.
- The molecule consists of two hydroxyl (–OH) groups connected by a single bond between the two oxygen atoms.

### Step 3: Analyze the Bond Angles
- The bond angle in H₂O₂ is approximately 94.5 degrees, indicating that the molecule has a bent shape due to the repulsion between the lone pairs of electrons on the oxygen atoms.

### Step 4: Evaluate the Statements
- Now, we need to evaluate the statements provided in the question:
1. H₂O₂ is a pale blue liquid. (True)
2. H₂O₂ can act as both an oxidizing and reducing agent. (True)
3. The two hydroxyl groups of H₂O₂ lie in the same plane. (Not true, as they lie in opposite planes due to its non-planar structure.)

### Conclusion
- The statement that is not true about H₂O₂ is that the two hydroxyl groups lie in the same plane. Therefore, the answer is option B.

### Final Answer
The statement that is not true about H₂O₂ is: **The two hydroxyl groups of H₂O₂ lie in the same plane.** (Option B)

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