At high temperature, nitrogen combines with `CaC_(2)` to give `:`

Options

A. Calcium Cyanide
B. Calcium Cyanamide
C. Calcium Carbonate
D. Calcium Nitride

Answer

To solve the question of what nitrogen combines with calcium carbide (CaC₂) to produce at high temperatures, we can follow these steps:

### Step 1: Identify the Reactants
The reactants in this reaction are nitrogen gas (N₂) and calcium carbide (CaC₂).

### Step 2: Understand the Reaction Conditions
The reaction occurs at high temperatures, which can lead to the formation of various nitrogen-containing compounds.

### Step 3: Write the Reaction
The reaction can be represented as:
\[ \text{CaC}_2 + \text{N}_2 \rightarrow \text{Products} \]

### Step 4: Determine Possible Products
At high temperatures, calcium carbide can react with nitrogen to form several compounds. The most notable products include:
1. Calcium cyanide (Ca(CN)₂)
2. Calcium cyanamide (CaCN₂)
3. Calcium nitride (Ca₃N₂)

### Step 5: Identify the Main Product
The primary product formed when nitrogen reacts with calcium carbide at high temperatures is calcium cyanamide (CaCN₂). This is due to the reaction favoring the formation of cyanamide over other compounds under these conditions.

### Step 6: Write the Balanced Reaction
The balanced equation for the formation of calcium cyanamide from calcium carbide and nitrogen is:
\[ \text{CaC}_2 + \text{N}_2 \rightarrow \text{CaCN}_2 \]

### Conclusion
Thus, the correct answer to the question is that at high temperatures, nitrogen combines with calcium carbide to produce calcium cyanamide (CaCN₂).

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