Educhlorine is

Options

A. Obtained by heating perchlorate with conc. `HCI`
B. A chloride of europium
C. A mixture of `CI_(2)` and `CI_(2)O_(7)`
D. A mixture of `CI_(2)` and `CIO_(2)`

Explanation

To understand what Educhlorine is, we can break down the information provided in the video transcript step by step.

### Step 1: Identify the Reaction
The reaction provided in the transcript is:
\[ \text{KClO}_3 + \text{HCl} \rightarrow \text{KCl} + \text{Cl}_2 + \text{ClO}_2 + \text{H}_2\text{O} \]

### Step 2: Balance the Reaction
To balance the reaction, we need to ensure that the number of atoms of each element is the same on both sides of the equation. The balanced equation is:
\[ 2 \text{KClO}_3 + 6 \text{HCl} \rightarrow 2 \text{KCl} + 3 \text{Cl}_2 + 2 \text{ClO}_2 + 4 \text{H}_2\text{O} \]

### Step 3: Determine the Oxidation States
Next, we determine the oxidation states of chlorine in the various compounds:
- In \( \text{KClO}_3 \), Cl is in the +5 oxidation state.
- In \( \text{HCl} \), Cl is in the -1 oxidation state.
- In \( \text{Cl}_2 \), Cl is in the 0 oxidation state.
- In \( \text{ClO}_2 \), Cl is in the +4 oxidation state.

### Step 4: Identify the Disproportionation Reaction
The reaction involves the disproportionation of chlorine, where:
- Chlorine in the +5 state (from \( \text{KClO}_3 \)) is reduced to 0 (in \( \text{Cl}_2 \)) and +4 (in \( \text{ClO}_2 \)).
- Chlorine in the -1 state (from \( \text{HCl} \)) remains unchanged.

### Step 5: Define Educhlorine
Educhlorine is defined as a mixture of \( \text{Cl}_2 \) (chlorine gas) and \( \text{ClO}_2 \) (chlorine dioxide).

### Conclusion
Thus, Educhlorine is a mixture of chlorine gas (\( \text{Cl}_2 \)) and chlorine dioxide (\( \text{ClO}_2 \)).

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