Question

Which one of the following is obtained from Coal Tar?

• A. Petrol
• B. Coke
• C. Air
• D. Naphthalene balls​

Answer 1

The correct option is D

Naphthalene balls​

Explanation for correct option

(D) Naphthalene balls​

Coal tar

• As a byproduct of the conversion of coal to coke and coal to gas, coal tar is a viscous, dark liquid.
• Coal tar is used for both medical and industrial purposes.
• It is a medication used topically on the skin that is used to treat psoriasis and seborrheic dermatitis.
• It is used in industry as a railway tie preservative and in the paving of highways.

Naphthalene balls

• Insect repellent naphthalene balls are made from coal tar.
• Naphthalene is a chemical with the formula ${\mathrm{C}}_{10}{\mathrm{H}}_8$.
• It is a white crystalline solid with a strong odor.
• A fused pair of benzene rings make up the structure of naphthalene, an aromatic hydrocarbon.

Structure of naphthalene

Explanation for incorrect options

• The Naphthalene balls​ are obtained from coal tar.
• Hence, all other options (A), (B) and (C) are incorrect.

Therefore the correct option is (D) Naphthalene balls​.