Which gaseous hydrocarbon is produced when calcium carbide reacts with water?

Options

A. Methane
B. Ethene
C. Ethylene
D. Acetylene

Explanation

To determine which gaseous hydrocarbon is produced when calcium carbide reacts with water, we can follow these steps:

### Step 1: Identify the Reactants
The reactants in this reaction are calcium carbide (CaC₂) and water (H₂O).

### Step 2: Write the Chemical Reaction
When calcium carbide reacts with water, the chemical reaction can be represented as follows:
\[ \text{CaC}_2 + 2 \text{H}_2\text{O} \rightarrow \text{C}_2\text{H}_2 + \text{Ca(OH)}_2 \]

### Step 3: Identify the Products
From the reaction, we can see that the products formed are:
- Acetylene (C₂H₂), which is a gaseous hydrocarbon.
- Calcium hydroxide (Ca(OH)₂), which is a solid.

### Step 4: Conclude the Gaseous Hydrocarbon
The gaseous hydrocarbon produced in this reaction is acetylene (C₂H₂).

### Final Answer
The gaseous hydrocarbon produced when calcium carbide reacts with water is **acetylene (C₂H₂)**.

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