Maximum number of electrons are present in

Options

A. 2.24 lit of `SO_(2)` at S.T.P
B. 0.2 moles of `NH_(3)`
C. 1.5 gm moles of oxygen
D. 2 mole atoms of sulphur

Explanation

To determine the maximum number of electrons present in the given options, we will analyze each option step by step.

### Step 1: Analyze the first option - 2.24 liters of SO2 at STP
1. **Calculate moles of SO2**:
- At STP, 1 mole of any gas occupies 22.4 liters.
- Therefore, moles of SO2 = \( \frac{2.24 \text{ L}}{22.4 \text{ L/mol}} = \frac{1}{10} \text{ moles} \).

2. **Calculate the number of molecules**:
- Using Avogadro's number (Na = \( 6.022 \times 10^{23} \) molecules/mol):
- Number of molecules = \( \frac{1}{10} \times Na = \frac{1}{10} \times 6.022 \times 10^{23} \).

3. **Calculate the number of electrons in SO2**:
- SO2 consists of 1 sulfur atom and 2 oxygen atoms.
- Sulfur has 16 electrons, and each oxygen has 8 electrons.
- Total electrons in one SO2 molecule = \( 16 + 2 \times 8 = 32 \).
- Therefore, total electrons = \( \frac{1}{10} \times Na \times 32 \).

### Step 2: Analyze the second option - 0.2 moles of NH3
1. **Calculate the number of molecules**:
- Number of molecules = \( 0.2 \times Na \).

2. **Calculate the number of electrons in NH3**:
- NH3 consists of 1 nitrogen atom and 3 hydrogen atoms.
- Nitrogen has 7 electrons, and each hydrogen has 1 electron.
- Total electrons in one NH3 molecule = \( 7 + 3 \times 1 = 10 \).
- Therefore, total electrons = \( 0.2 \times Na \times 10 \).

### Step 3: Analyze the third option - 1.5 moles of O2
1. **Calculate the number of molecules**:
- Number of molecules = \( 1.5 \times Na \).

2. **Calculate the number of electrons in O2**:
- O2 consists of 2 oxygen atoms.
- Each oxygen has 8 electrons.
- Total electrons in one O2 molecule = \( 2 \times 8 = 16 \).
- Therefore, total electrons = \( 1.5 \times Na \times 16 \).

### Step 4: Analyze the fourth option - 2 mole atoms of sulfur
1. **Calculate the number of atoms**:
- Number of atoms = \( 2 \times Na \).

2. **Calculate the number of electrons in sulfur**:
- Each sulfur atom has 16 electrons.
- Therefore, total electrons = \( 2 \times Na \times 16 \).

### Step 5: Compare the total number of electrons from each option
- **Option 1 (SO2)**: \( \frac{1}{10} \times Na \times 32 = 3.2 \times Na \)
- **Option 2 (NH3)**: \( 0.2 \times Na \times 10 = 2 \times Na \)
- **Option 3 (O2)**: \( 1.5 \times Na \times 16 = 24 \times Na \)
- **Option 4 (Sulfur)**: \( 2 \times Na \times 16 = 32 \times Na \)

### Conclusion
The maximum number of electrons is in the fourth option (2 mole atoms of sulfur), which gives \( 32 \times Na \).