Because alcohol is dangerously inflammable so it is not heated directly

Alcohol not heated directly to remove chlorophyll from leaves

Chlorophyll is a pigment found in plants that gives them their green color. When attempting to remove chlorophyll from leaves, it is important to note that alcohol should not be heated directly for this purpose. Here's why:

Alcohol's boiling point:
- Alcohol has a relatively low boiling point, around 78 degrees Celsius for ethanol. When heated directly, alcohol can quickly reach its boiling point and evaporate, potentially causing a fire hazard.

Loss of chlorophyll:
- Heating alcohol directly to remove chlorophyll can lead to the loss of chlorophyll itself. Chlorophyll is sensitive to heat and can degrade or break down at high temperatures. This can result in a less effective extraction of chlorophyll from the leaves.

Damage to the plant material:
- Directly heating alcohol with plant material can also damage the leaves. High temperatures can denature proteins and break down cell structures in the plant, affecting the overall quality of the chlorophyll extraction.

Safety concerns:
- Heating alcohol in an open flame can pose safety risks due to its flammable nature. It is important to handle alcohol with care and follow proper safety protocols when using it in experiments.

In conclusion, while alcohol can be used to extract chlorophyll from leaves, it should not be heated directly. It is safer and more effective to use a gentle extraction method such as soaking the leaves in alcohol at room temperature to preserve the chlorophyll and ensure a successful extraction process.