MCQ PracticeMain constituent of limestone isSubject: Chemical EngineeringTopic: Chemical ProcessACaCO 3BMgCO 3CNa 2 CO 3DCaSO 4Correct Answer: APractice 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