Which of the following compounds is not obtained when the products obtained from the electrolysis of brine are mixed?

Options

A. `NaCl`
B. `H_(2)`
C. `NaOCl`
D. `Cl_(2)`

Answer

To solve the question of which compound is not obtained when the products from the electrolysis of brine are mixed, we can follow these steps:

### Step 1: Understand the Electrolysis of Brine
Brine is a concentrated solution of sodium chloride (NaCl) in water. When brine undergoes electrolysis, it dissociates into its ions:
- NaCl → Na⁺ + Cl⁻

### Step 2: Identify the Products of Electrolysis
During electrolysis:
- At the anode (positive electrode), chloride ions (Cl⁻) are oxidized to form chlorine gas (Cl₂).
- At the cathode (negative electrode), water is reduced to form hydrogen gas (H₂) and hydroxide ions (OH⁻).

The overall reactions can be summarized as:
- Anode: 2Cl⁻ → Cl₂ + 2e⁻
- Cathode: 2H₂O + 2e⁻ → H₂ + 2OH⁻

### Step 3: Identify the Electrolyte Solution
The remaining solution after electrolysis contains sodium hydroxide (NaOH), which is formed from the hydroxide ions produced at the cathode:
- Na⁺ + OH⁻ → NaOH

### Step 4: Mixing the Products
When the products of electrolysis (Cl₂, H₂, and NaOH) are mixed, chlorine gas (Cl₂) can react with sodium hydroxide (NaOH) to form sodium hypochlorite (NaOCl) and sodium chloride (NaCl):
- Cl₂ + 2NaOH → NaOCl + NaCl + H₂O

### Step 5: Determine Which Compound is Not Obtained
After mixing, the products we have are:
- Sodium hypochlorite (NaOCl)
- Sodium chloride (NaCl)
- Hydrogen gas (H₂)

However, chlorine gas (Cl₂) is consumed in the reaction and is not present in the final mixture.

### Conclusion
The compound that is not obtained when the products from the electrolysis of brine are mixed is **Cl₂**.

### Final Answer
**Cl₂ is not obtained.**

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