Which of the following substances has the highest Threshold Limit Value (TLV), approximately 500 ppm?

Chemical Environmental Engineering MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

PPSCFPSCNTSPakistan govt jobs
Subject
Chemical Environmental Engineeringchemical-engineering › chemical-environmental-engineering-chemical-engineering
Published
11 Mar 2019
Last updated
28 May 2026

Browse all Chemical Environmental Engineering MCQs

Choose the correct answer

Explanation

Among the listed chemicals, carbon dioxide possesses the highest TLV, around 500 ppm, indicating it can be present in higher concentrations before reaching harmful exposure levels compared to toluene, carbon disulfide, and acetaldehyde.

PakQuizHub — free MCQs and past papers for Pakistan government job tests. Content is for educational practice only.