The tall tower into which vapours of crude oil are passed during fractional distillation is called a _____________column.

Options

A. Refinery
B. Distillation
C. Fractionating
D. None of them

Answer

The tall tower into which vapors of crude oil are passed during fractional distillation is called a **fractionating column**.

### Step-by-Step Solution:

1. **Understanding the Process**: Fractional distillation is a method used to separate a mixture into its component parts or fractions based on different boiling points.

2. **Identifying the Equipment**: In this process, a tall tower is utilized. This tower is essential for allowing the vapors to rise and cool at different heights, where they can condense back into liquid at various temperatures.

3. **Naming the Column**: The specific name for this tall tower used in fractional distillation is the **fractionating column**. This column is designed to maximize the separation of the different components of crude oil.

4. **Conclusion**: Therefore, the correct answer to the question is that the tall tower into which vapors of crude oil are passed during fractional distillation is called a **fractionating column**.