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

Options

A. calcium cyanide
B. calcium cyanamide
C. calcium carbonate
D. calcium nitride

Explanation

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

### Step-by-Step Solution:

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

2. **Understand the Reaction Conditions**: The reaction occurs at high temperatures. This is important because nitrogen (N₂) has a strong triple bond, which requires significant energy to break.

3. **Write the Reaction**: The reaction can be represented as:
\[ \text{CaC}_2 + \text{N}_2 \xrightarrow{\text{high temperature}} \text{CaCN}_2 + \text{C} \]
Here, calcium carbide reacts with nitrogen to form calcium cyanamide (CaCN₂) and solid carbon (C).

4. **Identify the Product**: The primary product formed in this reaction is calcium cyanamide (CaCN₂). This compound is formed when nitrogen inserts into the bond between calcium and carbon in calcium carbide.

5. **Conclusion**: Therefore, the correct answer to the question is calcium cyanamide (CaCN₂).

### Final Answer:
The product formed when nitrogen combines with calcium carbide (CaC₂) at high temperatures is calcium cyanamide (CaCN₂).

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