HomeEngineeringWhen the concentration of SO₂ in air is greater than __________ ppm, it gives a pungent smell. 5664. When the concentration of SO₂ in air is greater than __________ ppm, it gives a pungent smell.By Admin / September 7, 2025 0.01 0.1 1 4 ✅ The correct answer is option D.
1. A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm². Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin
2. Transformer cores are normally made from Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin