Which of the following combination doen's evolve `Cl_(2)` gas?

Options

A. `HCl(aq.)+KMnO_(4)`
B. `HCl+MnO_(2)`
C. `HCl+I_(2)`
D. `HCl+F_(2)`

Explanation

To determine which combination does not evolve chlorine gas, we will analyze each of the given reactions step by step.

### Step 1: Analyze the first combination - Hydrochloric acid (HCl) and Potassium Permanganate (KMnO4)

**Reaction:**
\[ \text{HCl} + \text{KMnO}_4 \rightarrow \text{KCl} + \text{MnCl}_2 + \text{Cl}_2 + \text{H}_2\text{O} \]

**Observation:**
In this reaction, chlorine gas (Cl2) is produced as a product.

### Step 2: Analyze the second combination - Hydrochloric acid (HCl) and Manganese Dioxide (MnO2)

**Reaction:**
\[ \text{HCl} + \text{MnO}_2 \rightarrow \text{MnCl}_2 + \text{Cl}_2 + \text{H}_2\text{O} \]

**Observation:**
Here too, chlorine gas (Cl2) is evolved.

### Step 3: Analyze the third combination - Hydrochloric acid (HCl) and Iodine (I2)

**Reaction:**
\[ \text{HCl} + \text{I}_2 \rightarrow \text{No Reaction} \]

**Observation:**
In this case, there is no reaction between hydrochloric acid and iodine. Therefore, chlorine gas is not evolved.

### Step 4: Analyze the fourth combination - Hydrochloric acid (HCl) and Chlorine (Cl2)

**Reaction:**
\[ \text{HCl} + \text{Cl}_2 \rightarrow \text{HCl} + \text{Cl}_2 \]

**Observation:**
This reaction involves chlorine gas, and it does not produce any new chlorine gas but involves it in the reaction.

### Conclusion
Among the combinations analyzed, the only one that does not evolve chlorine gas is the reaction between hydrochloric acid and iodine.

**Final Answer:**
The combination that does not evolve Cl2 gas is the reaction between Hydrochloric Acid and Iodine (Option C).

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