Coal tar contains abouta)300 substancesb)400 substancesc)200 substancesd)100 substances.Correct answer is option 'C'. Can you explain this answer?

Question

Answer

Coal Tar is a mixture of 200 substances. Many substances like bitumen etc. are extracted from Coal Tar. Just like the petroleum is a mixture of many substances like petrol, diesel, gasoline, superfine petroleum etc. just like that, it is also the same it is also a mixture of many many substances. In olden days Coal Tar was used to apply on road but now instead of using Coal Tar we use bitumen in the place of Coal Tar. This is because Coal Tar is a mixture of many substances but bitumen is not. So if you use Coal Tar that would mean we are using many substances together but if we use bitumen then it means that we are using just one substance at one time.
Hope you understood,
Thanks for reading,
Goodbye until next answer.
Soukarsha Bhadra

Answer

The coal tars are generally variable and complex mixtures of poly cyclic aromatic hydrocarbons, phenol as well as hetero cyclic compounds. Totally, there are roughly about 200 substances present in coal tar.
correct answer is (c)

Answer

Coal tar is a thick, black, and sticky liquid that is produced during the process of coal gasification or coke production from coal. It is a byproduct of the coal industry and is commonly used in various applications such as road construction, roofing, and as a base material for the production of dyes, paints, and pharmaceuticals. Coal tar is known to contain numerous substances, and the correct answer is option C, which states that coal tar contains about 200 substances.

Here is a detailed explanation of the answer:

Properties of Coal Tar:

Coal tar is a complex mixture of organic compounds that are formed when coal is heated in the absence of air. It is composed mainly of aromatic hydrocarbons, which are organic compounds that contain one or more benzene rings. Coal tar is highly viscous and has a strong odor. It is insoluble in water but soluble in organic solvents such as benzene and toluene.

Composition of Coal Tar:

Coal tar is a complex mixture that contains a wide range of substances. It is estimated that coal tar contains about 200 different substances, including aromatic hydrocarbons, phenols, heterocyclic compounds, and polycyclic aromatic hydrocarbons (PAHs). PAHs are a group of organic compounds that are known to be carcinogenic and can pose a risk to human health and the environment.

Uses of Coal Tar:

Coal tar has been used for various purposes due to its unique properties. Some of the common uses of coal tar include:

1. Road Construction: Coal tar is used as a binding agent in the construction of roads and pavements. It helps in creating a durable and water-resistant surface.

2. Roofing: Coal tar is used as a waterproofing material in the construction of roofs. It forms a protective layer that prevents water leakage.

3. Paints and Dyes: Coal tar is used as a base material for the production of paints, dyes, and pigments. It provides color and enhances the durability of the products.

4. Medicinal Applications: Coal tar is used in the formulation of various medicinal products such as creams, ointments, and shampoos. It is used to treat skin conditions such as psoriasis and eczema.

5. Wood Preservation: Coal tar is used as a wood preservative to protect wooden structures from decay and insect damage.

Conclusion:

In conclusion, coal tar is a complex mixture that contains about 200 different substances. It is used in various applications such as road construction, roofing, paints, and pharmaceuticals. It is important to handle coal tar with caution due to the presence of potentially harmful substances such as PAHs.

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