Question

1 which compound released from burning plastics is especially dangerous because it accumulates in fat tissue?
a) carbon dioxide
b) lead
c) dioxins
d) silica

matching
match the chemical concept with its example from 9/11.

| concept | answer options

1 | combustion | a) highly alkaline material that irritated lungs
2 | incomplete combustion | b) dangerous organic compounds from plastics
3 | alkaline dust | c) jet fuel reacting with oxygen
4 | heavy metals | d) lead, mercury, cadmium from electronics
5 | dioxins | e) byproducts like carbon monoxide and pahs

fill-in-the-blank

1. fine particles known as particulates can travel deep into the lungs and cause lasting health effects.
2. burning plastics and wiring released dangerous organic compounds.
3. the dust cloud was dangerous not only for large particles but especially for fine matter that stayed in the air.

Explanation:

Multiple - Choice Question (Question 1)

• Option a: Carbon dioxide is a common combustion product, but it does not accumulate in fat tissue.
• Option b: Lead is a heavy metal, and while it can be toxic, it is not the compound released from burning plastics that accumulates in fat tissue in the context of this question.
• Option c: Dioxins are dangerous organic compounds released from burning plastics. They are lipophilic (fat - soluble) and thus accumulate in fat tissue.
• Option d: Silica is a mineral compound, not related to burning plastics and fat - tissue accumulation.

Combustion is the process of a substance reacting with oxygen to produce heat and light. Jet fuel reacting with oxygen is a typical example of combustion. So the match for combustion is option c.

Incomplete combustion occurs when there is not enough oxygen for complete oxidation, and it produces by - products like carbon monoxide and polycyclic aromatic hydrocarbons (PAHs). So the match for incomplete combustion is option e.

Answer:

c) Dioxins

Matching Questions

1. Combustion