Chlorine has great affinity for hydrogen. It reacts with compouns contaiing hydrogen to form `HCl`. Which of the following reaction/s gives/s `HCl`?

Options

A. `H_(2)O+Cl_(2)to`
B. `H_(2)S+Cl_(2)to`
C. `C_(10)H_(16)+8Cl_(2)to`
D. `underset(("excess"))(NH_(3))+3Cl_(2)to`

Explanation

To determine which reactions produce HCl, we will analyze each reaction step by step.

### Step 1: Analyze the first reaction - H2O with Cl2
- **Reaction**: H2O + Cl2 → HCl + O
- **Explanation**: Chlorine reacts with water (H2O) to produce hydrochloric acid (HCl) and oxygen (O). Since HCl is produced, this reaction is valid.

### Step 2: Analyze the second reaction - H2S with Cl2
- **Reaction**: H2S + Cl2 → HCl + S
- **Explanation**: Chlorine reacts with hydrogen sulfide (H2S) to produce hydrochloric acid (HCl) and sulfur (S). Since HCl is produced, this reaction is valid.

### Step 3: Analyze the third reaction - C10H16 with Cl2
- **Reaction**: C10H16 + Cl2 → HCl + C (and other products)
- **Explanation**: In this reaction, chlorine reacts with a hydrocarbon (C10H16) to produce hydrochloric acid (HCl) and carbon (C). Since HCl is produced, this reaction is valid.

### Step 4: Analyze the fourth reaction - NH3 with Cl2
- **Reaction**: NH3 + Cl2 → NH4Cl + N2
- **Explanation**: Chlorine reacts with ammonia (NH3) to produce ammonium chloride (NH4Cl) and nitrogen gas (N2). This reaction does not produce HCl, so it is not valid for our question.

### Conclusion
From the analysis, we find that:
- Reaction 1 (H2O + Cl2) produces HCl.
- Reaction 2 (H2S + Cl2) produces HCl.
- Reaction 3 (C10H16 + Cl2) produces HCl.
- Reaction 4 (NH3 + Cl2) does not produce HCl.

Thus, the correct options that produce HCl are A, B, and C.