MCQ PracticeMain constituent of phosphate rock isSubject: Chemical EngineeringTopic: Fertiliser TechnologyAAmmonium phosphateBFlour apatiteCCalcium fluorideDCalcium phosphateCorrect 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