Which of the following is obtained form coal tar?

Options

A. Petrol
B. Coke
C. Air
D. Naphthalene balls

Answer

To determine which of the options is obtained from coal tar, let's analyze each option step by step.

### Step 1: Understand what coal tar is
Coal tar is a thick, black liquid that is a byproduct of the carbonization of coal. It contains a complex mixture of organic compounds, many of which are aromatic hydrocarbons.

**Hint:** Coal tar is produced during the process of turning coal into coke.

### Step 2: Analyze the options
1. **Petrol**: Petrol, or gasoline, is derived from crude oil through the process of refining and is not obtained from coal tar.

**Hint:** Think about the source of petrol; it's primarily from crude oil, not coal.

2. **Coke**: Coke is a solid carbonaceous material produced by heating coal in the absence of air. It is not obtained from coal tar but rather from the coal itself.

**Hint:** Consider the production process of coke; it is made directly from coal, not from coal tar.

3. **Air**: Air is a mixture of gases and is not a product of coal tar.

**Hint:** Air is a natural resource and not a byproduct of any chemical process involving coal.

4. **Naphthalene balls**: Naphthalene is an organic compound that is indeed obtained from coal tar. It is commonly used in mothballs and as a precursor to various chemicals.

**Hint:** Naphthalene is specifically mentioned as a product derived from coal tar.

### Step 3: Conclusion
From the analysis, the correct answer is **naphthalene balls**, as they are the only option that is obtained from coal tar.

**Final Answer:** Naphthalene balls are obtained from coal tar.