Which toxic substance is a clear oily substance often used in electrical transformers?Group of answer choicesPCB’sBenzeneDioxinsRadon

The correct answer to your question is PCBs (Polychlorinated Biphenyls).

PCBs are a class of synthetic organic chemicals that consist of carbon, hydrogen, and chlorine atoms. Due to their non-flammability, chemical stability, and electrical insulating properties, PCBs were widely used in electrical equipment such as transformers and capacitors, hydraulic systems, and other applications where high electrical resistance is needed.

Governments and health organizations have since recognized the hazards associated with PCBs, including their potential carcinogenic effects and environmental impact. Consequently, the production and use of PCBs have been banned or severely restricted in many countries.

In contrast, benzene is a volatile organic compound primarily used as a solvent and in the production of chemicals. Dioxins are byproducts of various industrial processes and are also toxic, while radon is a naturally occurring radioactive gas. None of these substances match the description of a clear oily substance used in transformers as precisely as PCBs do.