How many of the following reactions would have HCl as one of the products ?
(a)`CH_3Cl+H_2O to ` (b) `FeSO_4 + H_2SO_4 + Cl_2 to`
(c) `l_2+Cl_2+H_2O to `
(d)`H_2O+SO_2+Cl_2 to`
(e) `SO_3+Cl_2 to`
(f) `NaCI(aq)overset("Electrolysis")to`
(g) `Cl_2+H_2O`
(h) `Cl_2O_7+H_2O to`
(i)`Cl_2+NaOH(conc) to`

Answer

To determine how many of the given reactions produce HCl as one of the products, we will analyze each reaction step by step.

### Step-by-Step Solution:

1. **Reaction (a): CH₃Cl + H₂O → ?**
- When methyl chloride (CH₃Cl) reacts with water (H₂O), it undergoes hydrolysis to form methanol (CH₃OH) and hydrochloric acid (HCl).
- **Products:** CH₃OH + HCl
- **HCl is produced.**

2. **Reaction (b): FeSO₄ + H₂SO₄ + Cl₂ → ?**
- In this reaction, when iron(II) sulfate (FeSO₄) reacts with sulfuric acid (H₂SO₄) and chlorine gas (Cl₂), it produces iron(III) sulfate (Fe₂(SO₄)₃) and hydrochloric acid (HCl).
- **Products:** Fe₂(SO₄)₃ + 2HCl
- **HCl is produced.**

3. **Reaction (c): I₂ + Cl₂ + H₂O → ?**
- When iodine (I₂) reacts with chlorine (Cl₂) in the presence of water (H₂O), it forms iodic acid (HIO₃) and hydrochloric acid (HCl).
- **Products:** 2HIO₃ + 10HCl
- **HCl is produced.**

4. **Reaction (d): H₂O + SO₂ + Cl₂ → ?**
- Here, water (H₂O) reacts with sulfur dioxide (SO₂) and chlorine (Cl₂) to produce sulfuric acid (H₂SO₄) and hydrochloric acid (HCl).
- **Products:** H₂SO₄ + 2HCl
- **HCl is produced.**

5. **Reaction (e): SO₃ + Cl₂ → ?**
- In this case, sulfur trioxide (SO₃) reacts with chlorine (Cl₂) to form sulfur dioxide (SO₂) and chlorine monoxide (ClO), but no HCl is produced.
- **Products:** SO₂ + ClO
- **HCl is not produced.**

6. **Reaction (f): NaCl(aq) → Electrolysis → ?**
- During the electrolysis of sodium chloride (NaCl), sodium (Na) and chlorine gas (Cl₂) are produced. There is no formation of HCl in this process.
- **Products:** Na + Cl₂
- **HCl is not produced.**

7. **Reaction (g): Cl₂ + H₂O → ?**
- Chlorine gas (Cl₂) reacts with water (H₂O) to produce hydrochloric acid (HCl) and hypochlorous acid (HClO).
- **Products:** HCl + HClO
- **HCl is produced.**

8. **Reaction (h): Cl₂O₇ + H₂O → ?**
- When dichlorine heptoxide (Cl₂O₇) reacts with water (H₂O), it forms perchloric acid (HClO₄) but does not produce HCl.
- **Products:** 2HClO₄
- **HCl is not produced.**

9. **Reaction (i): Cl₂ + NaOH(conc) → ?**
- Chlorine gas (Cl₂) reacts with concentrated sodium hydroxide (NaOH) to produce sodium chloride (NaCl), sodium chlorate (NaClO₃), and water (H₂O). No HCl is formed in this reaction.
- **Products:** 5NaCl + NaClO₃ + 3H₂O
- **HCl is not produced.**

### Summary of Results:
- HCl is produced in reactions (a), (b), (c), (d), and (g).
- HCl is **not** produced in reactions (e), (f), (h), and (i).

### Final Count:
**Total reactions producing HCl:** 5 out of 9.