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Phenolphthalein

Class 10 Science के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

ScienceIf phenolphthalein is pink and methyl orange is yellow, what is the nature of the solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium SciencePhenolphthalein turns pink in an aqueous solution of sodium carbonate. What is the most appropriate reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Hard ScienceA student adds phenolphthalein to a colourless solution and observes a pink colour. Then dilute hydrochloric acid is added slowly and the pink colour disappears. Which conclusion is most correct?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceA solution turns blue litmus red but keeps phenolphthalein colourless. What is the nature of the solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Easy ScienceIn which condition will phenolphthalein change from colourless to pink?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Easy ScienceIf a solution turns red indicator paper blue and phenolphthalein pink, which pH is most likely?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Easy SciencePhenolphthalein is added to a colourless solution and it turns pink. On adding acid, the colour disappears. What does this show?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium SciencePhenolphthalein turns pink and methyl orange appears yellow in a solution. What is the nature of the solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Easy ScienceIf a solution turns red litmus blue and phenolphthalein pink, what is the nature of the solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Easy SciencePhenolphthalein is pink in a basic solution. What does becoming colourless on adding acid indicate?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 8Medium ScienceWhat colour does phenolphthalein show in a basic solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Easy ScienceHow does phenolphthalein appear in an acidic solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Easy SciencePhenolphthalein turns pink in sodium hydroxide. When hydrochloric acid is added slowly, when will the colour disappear?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceIf a solution turns red litmus blue and phenolphthalein pink, what is its likely pH?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Easy ScienceWhat colour does phenolphthalein give in a basic solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Easy ScienceHow does phenolphthalein appear in an acidic solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Easy ScienceIf blue litmus turns red in a solution and phenolphthalein remains colourless, what is the nature of the solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceWhy does phenolphthalein turn pink in sodium carbonate solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceIn which situation will phenolphthalein turn from colourless to pink?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceWhat colour does phenolphthalein show in a basic solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Easy