identify the correct statement(s):

Options

A. Ozone is a powerful oxidising agent as compared to `O_(2)`
B. Ozone racts with KOHH and gives ann orange coloured solid `KO_(3)`
C. There is a decrese in volume when ozone decomposed to form `O_(2)`
D. The decomposition of `O_(3)` to `O_(2)` is exothermic

Answer

To identify the correct statements regarding ozone and its properties, we will analyze each statement one by one.

### Step 1: Analyze Statement 1
**Statement:** Ozone is a powerful oxidizing agent as compared to oxygen.

**Analysis:** This statement is true. Ozone (O₃) can break down to form oxygen (O₂) and nascent oxygen (O), which is a highly reactive species. The presence of nascent oxygen gives ozone strong oxidizing properties, making it a more powerful oxidizing agent than molecular oxygen.

### Step 2: Analyze Statement 2
**Statement:** Ozone reacts with KOH and gives an orange-colored solid KO3.

**Analysis:** This statement is false. When ozone reacts with potassium hydroxide (KOH), it forms potassium superoxide (KO₂), which is an orange-colored solid. KO₃ does not exist as a stable compound in this reaction.

### Step 3: Analyze Statement 3
**Statement:** There is a decrease in volume when ozone decomposes to oxygen.

**Analysis:** This statement is false. The decomposition of ozone (2 O₃ → 3 O₂) results in an increase in the number of moles of gas (from 2 moles of ozone to 3 moles of oxygen). According to Avogadro's law, an increase in the number of moles leads to an increase in volume, not a decrease.

### Step 4: Analyze Statement 4
**Statement:** Decomposition of ozone to oxygen is exothermic.

**Analysis:** This statement is true. The formation of ozone from oxygen is an endothermic process (it requires energy), and thus the reverse reaction (decomposition of ozone to oxygen) is exothermic, releasing energy.

### Conclusion
After analyzing all statements, we find that:
- **Correct Statements:** 1 and 4
- **Incorrect Statements:** 2 and 3

### Final Answer
The correct statements are 1 and 4.

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