Amongst the following, total number of compounds soluble in sodium bicarbonate are: 2,4,6-trinitrophenol, benzoic acid, salicylic acid, acetyl chloride, acetic anhydride, trifluoroethanol, acetamide, benzenesulphonic acid

Explanation

To determine the total number of compounds soluble in sodium bicarbonate from the given list, we need to analyze each compound based on its acidic or basic nature. Sodium bicarbonate (NaHCO3) is a weak base and reacts with stronger acids to form a salt and carbonic acid.

### Step-by-Step Solution:

1. **Identify the Compounds:**
- 2,4,6-trinitrophenol
- Benzoic acid
- Salicylic acid
- Acetyl chloride
- Acetic anhydride
- Trifluoroethanol
- Acetamide
- Benzenesulphonic acid

2. **Check Each Compound for Acidity:**
- **2,4,6-trinitrophenol:** This is a very strong acid due to the presence of three nitro groups, which enhance its acidity. **Soluble in NaHCO3.**
- **Benzoic acid:** This is a weak acid but stronger than carbonic acid (H2CO3). **Soluble in NaHCO3.**
- **Salicylic acid:** This is also a weak acid but stronger than carbonic acid. **Soluble in NaHCO3.**
- **Acetyl chloride:** This is not an acid; it does not donate H+ ions. **Not soluble in NaHCO3.**
- **Acetic anhydride:** This is also not an acid; it does not donate H+ ions. **Not soluble in NaHCO3.**
- **Trifluoroethanol:** This is a weak acid but not stronger than carbonic acid. **Not soluble in NaHCO3.**
- **Acetamide:** This is an amide and does not act as an acid. **Not soluble in NaHCO3.**
- **Benzenesulphonic acid:** This is a strong acid due to the sulfonic group. **Soluble in NaHCO3.**

3. **Count the Soluble Compounds:**
- The soluble compounds are:
- 2,4,6-trinitrophenol
- Benzoic acid
- Salicylic acid
- Benzenesulphonic acid
- Total = 4 compounds.

### Final Answer:
The total number of compounds soluble in sodium bicarbonate is **4**.