When iron filings are heated in a stream of dry hydrogen chloride, the compound formed is `FeCl_x`, where x is :

Options

A. 1
B. 2
C. 3
D. 4

Explanation

To solve the question of what the compound formed when iron filings are heated in a stream of dry hydrogen chloride is, we can follow these steps:

### Step 1: Identify the Reactants
The reactants in this reaction are iron filings (Fe) and dry hydrogen chloride (HCl).

### Step 2: Understand the Reaction
When iron reacts with hydrogen chloride, it forms a chloride compound. The reaction can be represented as:
\[ \text{Fe} + \text{HCl} \rightarrow \text{FeCl}_x + \text{H}_2 \]

### Step 3: Determine the Product
The product formed from the reaction of iron with hydrogen chloride is ferrous chloride, which has the formula FeCl₂. This indicates that for the compound FeClₓ, the value of x is 2.

### Step 4: Write the Balanced Equation
The balanced chemical equation for the reaction is:
\[ \text{Fe} + 2\text{HCl} \rightarrow \text{FeCl}_2 + \text{H}_2 \]

### Step 5: Conclude the Value of x
From the formula of the compound formed, FeCl₂, we can conclude that the value of x is 2.

### Final Answer
Thus, when iron filings are heated in a stream of dry hydrogen chloride, the compound formed is FeCl₂, where x = 2.

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