Question

question 18 (5 points)
formaldehyde is a byproduct of which of the following?
a) alcohol
b) electronic cigarette vapor
c) opioids
d) lsd

Explanation:

🆕 New Concept Discovered: Chemical Byproducts of Vaping
Thermal degradation of e-liquids produces toxic aldehydes.

Step 1: Analyze the options

We need to identify which of the listed substances produces formaldehyde as a byproduct:

• a) alcohol: Metabolism of ethanol produces acetaldehyde, not formaldehyde (though methanol metabolism produces formaldehyde, "alcohol" in general health contexts refers to ethanol).
• b) electronic cigarette vapor: E-liquids typically contain propylene glycol and vegetable glycerin. When heated by the metal coils in e-cigarettes, these compounds undergo thermal decomposition (pyrolysis), which produces toxic carbonyl compounds, including formaldehyde.
• c) opioids: These are synthetic or natural pain relievers and do not produce formaldehyde as a characteristic byproduct of use.
• d) LSD: This is a hallucinogen and does not produce formaldehyde.

Step 2: Identify the correct source

When e-cigarette liquid is heated to high temperatures, the solvents break down to form formaldehyde, acetaldehyde, and acrolein. Therefore, formaldehyde is a known byproduct of electronic cigarette vapor.

Answer:

b) electronic cigarette vapor