Which of the following statements is correct for the process of burning of a candle?

Options

A. There is formation of a beautiful cup around the wick of the candle.
B. Capillary action of the wick draws the liquid wax up the flame where it vaporises
C. The flame is drawn to a good height by the rising column of hot air.
D. All of these

Explanation

To determine which statement is correct for the process of burning a candle, let's analyze each option step by step.

### Step 1: Understanding the Candle Structure
A candle consists of wax and a wick. The wick is typically made of braided cotton or another material that can absorb liquid wax.

**Hint:** Remember that the wick is essential for the candle to burn properly.

### Step 2: Melting of Wax
When a candle is lit, the heat from the flame melts the wax around the wick. This melted wax forms a small pool or "cup" around the wick.

**Hint:** Think about what happens to the solid wax when it is heated.

### Step 3: Capillary Action
The wick absorbs the melted wax through a process called capillary action. This allows the liquid wax to rise up the wick towards the flame, where it vaporizes and burns.

**Hint:** Consider how liquids move through narrow spaces, like in a straw.

### Step 4: Flame Height
As the wax vaporizes, it contributes to the flame. The heat generated by the burning wax creates a column of hot air that rises, which can cause the flame to flicker and rise higher.

**Hint:** Visualize how hot air behaves compared to cooler air.

### Step 5: Evaluating the Options
Now, let's evaluate the options provided:
1. There is a formation of a beautiful cup around the wick of a candle. (Correct)
2. Capillary action of a wick draws the liquid wax up the flame when it vaporizes. (Correct)
3. The flame is drawn to a good height by rising a column of hot air. (Correct)
4. All of these. (Correct)

Since all the individual statements are correct, the correct answer is option 4: "All of these."

**Final Answer:** The correct statement for the process of burning a candle is option 4: All of these.