Question

What is toxicity equivalence factor?

(a) Ratio of the toxicity of a chemical to that of another structurally related chemical (or index compound) chosen as a reference

(b) Ratio of the toxicity of a contaminant to that of another structurally related chemical (or index compound) chosen as a reference

(c) Ratio of the toxicity of a chemical to that of another chemical pollutant chosen as a reference

(d) Ratio of the toxicity of a chemical to that of source

The question was asked in a job interview.

My doubt stems from Toxicity Assessment topic in section Risk Assessment of Hazardous Waste Management

Answer 1

The correct answer is (a) Ratio of the toxicity of a chemical to that of another structurally related chemical (or index compound) chosen as a reference

Best explanation: Factor used to estimate the toxicity of a complex mixture, commonly a mixture of chlorinated dibenzo-p-dioxins [oxanthrenes], furans, and biphenyls.