`H_2 SO_4` is the most important acid used in the chemical industry. Concentrated `H_2 SO_4` has quite strong oxidising properties.
The shape of `H_2 SO_4` is

Options

A. Tetrahedral
B. Pyramidal
C. Plannar
D. T-shaped

Explanation

To determine the shape of sulfuric acid (H₂SO₄), we can follow these steps:

### Step 1: Identify the central atom and its valence electrons
- The central atom in H₂SO₄ is sulfur (S).
- Sulfur is in group 16 of the periodic table and has 6 valence electrons.

**Hint:** Look for the group number of the central atom in the periodic table to find its valence electrons.

### Step 2: Count the number of atoms bonded to the central atom
- In H₂SO₄, sulfur is bonded to 4 atoms: 2 oxygen atoms (O) through double bonds and 2 hydrogen atoms (H) through single bonds.
- Oxygen is divalent, meaning each oxygen atom forms two bonds, but here we consider the total number of monovalent atoms (hydrogens) attached to sulfur.

**Hint:** Identify the types of bonds and the number of atoms directly connected to the central atom.

### Step 3: Calculate the steric number
- The steric number can be calculated using the formula:
\[ \text{Steric Number} = \frac{1}{2} \left( V + M + C - A \right) \]
where:
- \( V \) = number of valence electrons of the central atom (6 for sulfur)
- \( M \) = number of monovalent atoms attached (2 for H)
- \( C \) = charge of anions (0 for H₂SO₄)
- \( A \) = charge of cations (0 for H₂SO₄)

Plugging in the values:
\[ \text{Steric Number} = \frac{1}{2} \left( 6 + 2 + 0 - 0 \right) = \frac{8}{2} = 4 \]

**Hint:** Remember that the steric number helps determine the molecular geometry.

### Step 4: Determine the hybridization
- A steric number of 4 corresponds to \( sp^3 \) hybridization.

**Hint:** Relate the steric number to hybridization types (e.g., 4 = sp³, 3 = sp², etc.).

### Step 5: Identify the molecular geometry
- For \( sp^3 \) hybridization and a steric number of 4 with no lone pairs, the molecular geometry is tetrahedral.

**Hint:** Visualize the arrangement of bonds in three-dimensional space to confirm the geometry.

### Conclusion
- Therefore, the shape of H₂SO₄ is tetrahedral.

**Final Answer:** The shape of H₂SO₄ is tetrahedral.