CTEVT Prep
Practice
Question Bank
Mock Test
Papers
Guidance
AI Assist
Log In
Sign Up
Back to Practice
hard • Past Paper
Which of these is a 'Persistent Organic Pollutant' (POP)?
O
O
Dibenzo-p-dioxin structure
A
Carbon monoxide
B
Dioxin
C
Nitrate
D
Phosphate