Examples of Persistent Organic Pollutants (POPs) are: (A) Dioxins (B) PAN (C)…
2022
Examples of Persistent Organic Pollutants (POPs) are:
(A) Dioxins
(B) PAN
(C) VOC
(D) FURANS
(E) PCB
Choose the correct answer from the options given below :
Answer: A. (A), (D), (E) only — ConceptPersistent organic pollutants are carbon-based chemicals that resist environmental breakdown, remain for long periods, accumulate in organisms, and can…
- A.
(A), (D), (E) only
- B.
(A), (B), (D) only
- C.
(B), (C), (E) only
- D.
(C), (D), (E) only
Attempted by 2 students.
Show answer & explanation
Correct answer: A
Concept
Persistent organic pollutants are carbon-based chemicals that resist environmental breakdown, remain for long periods, accumulate in organisms, and can travel far from their sources.
The Stockholm Convention identifies specific chemicals as POPs; a broad air-pollutant category is not automatically a POP unless the listed substance meets and is designated under these criteria.
Application
Listed substance | Classification |
|---|---|
Dioxins | Polychlorinated dibenzo-p-dioxins are unintentionally produced POPs. |
PAN | Peroxyacetyl nitrate is a secondary photochemical oxidant; it is not one of the listed POPs in this set. |
VOC | Volatile organic compounds are a broad class defined by volatility; the class itself is not the specific POP listing asked here. |
Furans | Polychlorinated dibenzofurans are unintentionally produced POPs. |
PCB | Polychlorinated biphenyls are listed POPs used historically as industrial chemicals and also produced unintentionally. |
Contrast
The combination of dioxins, PAN, and furans substitutes the secondary oxidant PAN for the listed POP PCB.
The combination of PAN, VOC, and PCB includes a secondary oxidant and a broad volatility-based class while omitting dioxins and furans.
The combination of VOC, furans, and PCB substitutes the broad VOC class for dioxins.
Result
Therefore, the required set is dioxins, furans, and PCBs.