Dalton's law of partial pressure will not apply to which of the following mixture of gases

Options

A. `H_2 " and " SO_2`
B. `H_2 " and " Cl_2`
C. `H_2 " and " CO_2`
D. `CO_2 " and " Cl_2`

Answer

To solve the question regarding which mixture of gases Dalton's law of partial pressure will not apply to, we can follow these steps:

### Step 1: Understand Dalton's Law of Partial Pressure
Dalton's law states that in a mixture of non-reacting gases, the total pressure exerted by the mixture is equal to the sum of the partial pressures of each individual gas. This means that for gases to follow Dalton's law, they must not react with each other.

### Step 2: Analyze the Options
We need to evaluate each option provided in the question to see if the gases in the mixture are non-reacting or reacting.

1. **Option A: H2 and SO2**
- These gases do not react with each other. Therefore, Dalton's law applies.

2. **Option B: H2 and Cl2**
- These gases react with each other to form HCl (H2 + Cl2 → 2 HCl). Therefore, Dalton's law does not apply.

3. **Option C: H2 and CO2**
- These gases do not react with each other. Therefore, Dalton's law applies.

4. **Option D: CO2 and Cl2**
- These gases do not react with each other. Therefore, Dalton's law applies.

### Step 3: Identify the Correct Answer
From the analysis above, the only mixture where Dalton's law of partial pressure does not apply is **Option B: H2 and Cl2** because they react with each other.

### Final Answer
The correct answer is **B: H2 and Cl2**.

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