MCQ PracticeThe main industrial source of emission of hydrogen sulphide air pollutant isSubject: Chemical EngineeringTopic: Environmental Engineering In CeAPetroleum refineriesBCoal based thermal power plantsCPulp and paper plantDMetallurgical roasting & smelting plantCorrect Answer: BPractice QuizBack to MCQsRelated MCQsCurrent flows in a circuit whenEighttenths coulomb passes a point in 4 s. The current in amperes isThe unit of electrical charge is the