A mixture of `C_(2)H_(6), C_(2)H_(4)` and `C_(2)H_(2)` is bubbled through alkaline solution of copper (I) chloride, contained in Woulf's bottle. The gas coming out is:

Options

A. Original mixture
B. `C_(2)H_(6)`
C. `C_(2)H_(6) "and" C_(2)H_(4)` mixture
D. `C_(2)H_(4) "and" C_(2)H_(2)`

Answer

To solve the problem, we need to analyze the behavior of the three hydrocarbons (C2H6, C2H4, and C2H2) when they are bubbled through an alkaline solution of copper(I) chloride (CuCl). Here's a step-by-step breakdown of the solution:

### Step 1: Identify the Hydrocarbons
The hydrocarbons in the mixture are:
- Ethane (C2H6)
- Ethylene (C2H4)
- Acetylene (C2H2)

### Step 2: Understand the Reactivity
In the presence of an alkaline solution of copper(I) chloride:
- Acetylene (C2H2) has an acidic hydrogen atom due to its sp-hybridization and can react with CuCl to form a complex (copper acetylide).
- Ethylene (C2H4) and Ethane (C2H6) do not have acidic hydrogens and are generally unreactive under these conditions.

### Step 3: Reaction of Acetylene with CuCl
When acetylene is bubbled through the alkaline solution of CuCl, it reacts as follows:
\[ \text{C}_2\text{H}_2 + \text{CuCl} \rightarrow \text{CuC}_2\text{H} + \text{HCl} \]
This reaction leads to the formation of a precipitate (copper acetylide).

### Step 4: Identify the Gases Coming Out
Since only acetylene reacts with the copper(I) chloride, the gases that will come out of the Woulf's bottle are:
- Ethane (C2H6)
- Ethylene (C2H4)

### Step 5: Conclusion
The gas mixture that comes out of the Woulf's bottle consists of ethane (C2H6) and ethylene (C2H4), as they do not react with the alkaline solution of copper(I) chloride.

### Final Answer
The gas coming out is a mixture of C2H6 and C2H4.

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