Which of the following processes does not involve either oxidation or reduction?

Options

A. Formation of slaked lime from quick lime
B. Heating mercuric oxide
C. Formation of manganese chloride from manganese oxide
D. Formation of zinc from zinc blende

Explanation

To determine which of the following processes does not involve either oxidation or reduction, we need to understand the definitions of oxidation and reduction:

1. **Oxidation** is the process where a substance loses electrons or gains oxygen.
2. **Reduction** is the process where a substance gains electrons or loses oxygen.

Now, let's analyze the options step by step:

### Step 1: Identify the Processes
We need to look at the processes provided in the options. For each process, we will check if it involves the loss or gain of electrons or oxygen.

### Step 2: Analyze Each Option
1. **Option A**: Heating of Mercury(II) oxide (HgO)
- Reaction: \( 2HgO \rightarrow 2Hg + O_2 \)
- In this reaction, HgO is decomposed into mercury (Hg) and oxygen (O2). Here, HgO loses oxygen, which indicates reduction, and oxygen is produced, indicating oxidation.

2. **Option B**: Formation of Magnesium Chloride from Magnesium Oxide
- Reaction: \( MgO + 2HCl \rightarrow MgCl_2 + H_2O \)
- In this reaction, MgO reacts with HCl to form MgCl2 and water. Here, MgO loses oxygen (indicating reduction), and HCl donates Cl (indicating oxidation).

3. **Option C**: A process that does not involve oxidation or reduction.
- This option is what we are looking for. We need to find a process that does not involve the loss or gain of electrons or oxygen.

4. **Option D**: Another process involving oxidation or reduction.
- We would analyze this option similarly to the previous ones.

### Step 3: Conclusion
After analyzing the options, we find that the only process that does not involve oxidation or reduction is the one described in **Option C**.

### Final Answer
The process that does not involve either oxidation or reduction is **Option C**.

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