For the reaction `2KClO_(3)to2KCl+3O_(2)` which statements (s) is (are) correct?

Options

A. It is disproportionation
B. It is intramolecular redox change
C. Cl atoms are reduced
D. Oxygen atoms are oxidized

Answer

To determine which statements are correct for the reaction \(2KClO_3 \rightarrow 2KCl + 3O_2\), we can analyze the oxidation states of the elements involved in the reaction. Here’s a step-by-step breakdown of the solution:

### Step 1: Write the Balanced Reaction
The balanced reaction is given as:
\[ 2KClO_3 \rightarrow 2KCl + 3O_2 \]

### Step 2: Determine Oxidation States
- For \(KClO_3\):
- Potassium (K) has an oxidation state of +1.
- Oxygen (O) has an oxidation state of -2.
- Let the oxidation state of chlorine (Cl) be \(x\).

The equation for the oxidation states in \(KClO_3\) is:
\[ +1 + x + 3(-2) = 0 \implies +1 + x - 6 = 0 \implies x = +5 \]
So, the oxidation state of chlorine in \(KClO_3\) is +5.

- For \(KCl\):
- Potassium (K) remains +1.
- Chlorine (Cl) in \(KCl\) has an oxidation state of -1.

- For \(O_2\):
- In elemental form, oxygen has an oxidation state of 0.

### Step 3: Analyze Changes in Oxidation States
- Chlorine changes from +5 in \(KClO_3\) to -1 in \(KCl\). This indicates that chlorine is being reduced (gaining electrons).
- Oxygen changes from -2 in \(KClO_3\) to 0 in \(O_2\). This indicates that oxygen is being oxidized (losing electrons).

### Step 4: Identify the Type of Reaction
Since one element (chlorine) is being reduced while another element (oxygen) is being oxidized, this reaction is classified as an **intramolecular redox reaction**. It is not a disproportionation reaction because the same element is not undergoing both oxidation and reduction.

### Step 5: Conclusion
Based on the analysis:
1. The reaction is an **intramolecular redox reaction**.
2. Chlorine atoms are **reduced**.
3. Oxygen atoms are **oxidized**.

Thus, all three statements regarding the reaction are correct.

### Final Answer:
All three statements are correct:
1. The reaction is an intramolecular redox reaction.
2. Chlorine atoms are reduced.
3. Oxygen atoms are oxidized.

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