MCQ PracticeIron is not used alone as a catalyst in ammonia synthesis, becauseSubject: Chemical EngineeringTopic: Fertiliser TechnologyAIts activity declines rapidly, if heated to above 520°CBIt decomposes ammoniaCIt gets oxidised above 500°CDNone of theseCorrect 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