Which of the following is used to reduce `TiCl_4` to Ti?

Options

A. C
B. Al
C. Mg
D. `H_2`

Answer

To solve the question "Which of the following is used to reduce TiCl₄ to Ti?", we can follow these steps:

### Step 1: Understand the Reaction
The question involves the reduction of Titanium Tetrachloride (TiCl₄) to Titanium (Ti). Reduction is a chemical process where a substance gains electrons or decreases its oxidation state.

### Step 2: Identify the Process
The reduction of TiCl₄ to Ti is commonly known as the Kroll process. This process is specifically designed for extracting titanium from its chloride.

### Step 3: Identify the Reducing Agent
In the Kroll process, the reducing agent used to convert TiCl₄ to Ti is liquid magnesium (Mg). Magnesium donates electrons to TiCl₄, reducing it to titanium.

### Step 4: Write the Reaction
The balanced chemical reaction for the reduction of TiCl₄ using magnesium can be represented as:
\[ \text{TiCl}_4 + 2 \text{Mg} \rightarrow \text{Ti} + 2 \text{MgCl}_2 \]
This shows that titanium is produced along with magnesium chloride (MgCl₂).

### Step 5: Conclusion
From the above analysis, we conclude that the correct answer to the question is magnesium, as it is the reducing agent used in the Kroll process to reduce TiCl₄ to Ti.

### Final Answer
The reducing agent used to reduce TiCl₄ to Ti is **Liquid Magnesium (Mg)**.

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