About `H_2 SO_4`, which of the following statements is incorrect ?

Options

A. It acts as a reducing agent
B. It acts as an oxidising agent
C. It acts as a dehydrating agent
D. It is highly viscous

Explanation

To determine which statement about \( H_2SO_4 \) (sulfuric acid) is incorrect, we will analyze each statement provided.

### Step 1: Analyze the first statement - "It acts as a reducing agent."
- **Explanation**: In \( H_2SO_4 \), sulfur is in the +6 oxidation state. Since this is the highest oxidation state sulfur can achieve, it cannot lose electrons to act as a reducing agent. Therefore, this statement is **incorrect**.

### Step 2: Analyze the second statement - "It acts as an oxidizing agent."
- **Explanation**: Given that sulfur in \( H_2SO_4 \) is in the +6 oxidation state, it can accept electrons from other substances, thus acting as an oxidizing agent. This statement is **correct**.

### Step 3: Analyze the third statement - "It acts as a dehydrating agent."
- **Explanation**: \( H_2SO_4 \) has a strong affinity for water and can remove water from other substances, making it a dehydrating agent. This statement is **correct**.

### Step 4: Analyze the fourth statement - "It is highly viscous."
- **Explanation**: \( H_2SO_4 \) exhibits high viscosity due to strong intermolecular forces, particularly hydrogen bonding, between its molecules. This statement is **correct**.

### Conclusion:
The only incorrect statement about \( H_2SO_4 \) is that it acts as a reducing agent. Therefore, the answer to the question is the first statement.

### Final Answer:
1. It acts as a reducing agent. (Incorrect)

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