Regarding the compound `CrO_(5)` which of the following statement is/are correct ?

Options

A. Oxidation number of Cr is (+6)
B. 4-oxygen atoms are present in form of peroxide
C. Oxidation number of Cr is +10
D. 2-oxygen atoms are present in form of peroxide

Answer

To determine the correct statements regarding the compound CrO5 (chromium pentoxide), we need to analyze the oxidation states and the structure of the compound. Let's go through the solution step by step.

### Step 1: Identify the structure of CrO5
CrO5 has a specific structure where one chromium atom is bonded to five oxygen atoms. In this structure, one oxygen is bonded via a double bond, while the other four are bonded through single bonds.

**Hint:** Visualize the structure of CrO5 to understand how the chromium and oxygen atoms are arranged.

### Step 2: Determine the oxidation state of chromium
To find the oxidation state of chromium (Cr) in CrO5, we can use the following equation based on the known oxidation states of oxygen:
- The oxidation state of the double-bonded oxygen (O) is -2.
- The four single-bonded oxygen atoms are in the form of peroxides, each having an oxidation state of -1.

Let the oxidation state of chromium be \( x \). The equation can be set up as follows:

\[ x + (-2) + 4 \times (-1) = 0 \]

This simplifies to:

\[ x - 2 - 4 = 0 \]

\[ x - 6 = 0 \]

\[ x = +6 \]

**Hint:** Remember that the sum of oxidation states in a neutral compound must equal zero.

### Step 3: Analyze the statements
Now, let's evaluate the statements given in the question:

1. **Statement A:** The oxidation number of chromium is +6.
- From our calculation, this statement is **correct**.

2. **Statement B:** Four oxygen atoms are present in the form of peroxide.
- Since we established that four of the oxygen atoms are indeed in the form of peroxides (each with an oxidation state of -1), this statement is also **correct**.

3. **Statement C:** The oxidation number of chromium is +10, and the two oxygen atoms are present in the form of peroxide.
- This statement is **incorrect** because we found that the oxidation state of chromium is +6, not +10.

### Conclusion
The correct statements regarding the compound CrO5 are:
- A: The oxidation number of chromium is +6.
- B: Four oxygen atoms are present in the form of peroxide.

Thus, the correct options are A and B.

**Final Answer:** Statements A and B are correct.