Explanation:
Dynamite is an explosive material used in various industrial applications. It is a mixture of nitroglycerine and an absorbent material such as diatomaceous earth or sawdust. Nitroglycerine is the major constituent of dynamite, which is responsible for its explosive properties.

Composition of Dynamite:
Dynamite is made up of the following ingredients:

- Nitroglycerine: It is a highly explosive compound that is sensitive to shock, heat, and friction. Nitroglycerine is the main component of dynamite and is responsible for its explosive power.

- Absorbent Material: The absorbent material used in dynamite serves as a stabilizer. It helps to absorb any moisture present in the nitroglycerine and prevents it from exploding prematurely. Diatomaceous earth, sawdust, or other similar materials are used as absorbents.

- Sodium Carbonate: Sodium carbonate is added to the dynamite mix to regulate the pH of the explosive. It helps to prevent the nitroglycerine from decomposing and becoming less explosive over time.

- Nitrate Salts: Nitrate salts such as ammonium nitrate or calcium nitrate are added to the dynamite mixture to increase its explosive power.

- Other Additives: Other additives such as waxes, oils, and stabilizers may be added to the dynamite mix to improve its handling and storage properties.

Role of Nitroglycerine:
Nitroglycerine is the most important ingredient in dynamite. It is a highly explosive compound that is sensitive to heat, shock, and friction. Nitroglycerine is a liquid with a pale yellow color that is very unstable. It can explode if subjected to a shock wave or if heated to a high temperature.

In dynamite, nitroglycerine is mixed with an absorbent material to make it more stable. The absorbent material helps to absorb any moisture present in the nitroglycerine and prevents it from exploding prematurely. When dynamite is ignited, the heat generated by the burning of the fuse vaporizes the nitroglycerine, creating a high-pressure gas that causes the explosion.

Conclusion:
In conclusion, the major constituent of dynamite is nitroglycerine. It is a highly explosive compound that is mixed with an absorbent material to make it more stable. Nitroglycerine is responsible for the explosive power of dynamite and is the main reason why it is used in various industrial applications.