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

ScienceAcids turn blue litmus paper into which colour?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 1Easy ScienceA base turns red litmus paper into which colour?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 1Easy ScienceWhy is it scientifically wrong to judge an unknown solution as acid or base only by its colour?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Easy 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 ScienceWhich statement correctly compares acids and bases?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Easy ScienceWhy may an acid show little effect on an indicator if water is absent?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceAqueous sodium chloride solution shows no change with red or blue indicator paper. What is the reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceWhy is it wrong to identify an acid or base by taste in the laboratory?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Easy ScienceWhy should an unknown colourless solution not be identified only by looking at it?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Easy 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 ScienceDry hydrogen chloride gas has no effect on dry blue indicator paper. What is the most correct reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 8Expert ScienceWhy should acids or bases not be identified by taste in a laboratory?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Easy 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 ScienceWhy should acids or bases not be identified by tasting them in a laboratory?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Easy ScienceIf the pH value is less than 7, what is the nature of the solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Easy ScienceWhich observation suggests that a base may be present in a solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Easy ScienceWhich statement about acids is the most correct?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Easy ScienceAn unknown solution turns red litmus blue and turmeric reddish brown. What is the nature of the solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceWhy should acids or bases not be identified by taste in a laboratory?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Easy