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Chemical Substances Nature And Behaviour

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

ScienceWhy can sodium hydroxide pellets become wet and later impure in open air?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceMethyl orange is red and phenolphthalein is colourless in a solution. What should be added to neutralise it?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceWhy is controlled heating of gypsum necessary?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceHow is the gas formed at the cathode in the chlor-alkali process tested?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceA moist gas turns red litmus blue but has no effect on dry litmus. What is the most correct conclusion about the gas?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Hard ScienceWhile diluting acid, why should acid be added to water instead of adding water to acid?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceAmong two acids of equal concentration, one has lower pH and higher conductivity. What type of acid is it likely to be?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceCarbon dioxide first makes lime water milky and then removes the milkiness in excess. Why does this happen?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceA salt solution shows pH 9 and turns red litmus blue. From which type of acid and base could it be formed?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Hard ScienceOne solution has pH 1 and another has pH 4. How much greater is the hydrogen ion concentration in the first solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Hard ScienceIn an acidic solution, zinc first releases a gas and then limestone releases another gas. What is the correct identification of both gases?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceA question asks to identify an acid or base only by taste. What is the correct exam-based response?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Easy ScienceIf a solution has pH 11 and phenolphthalein is pink, what will decrease first when acid is added?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceA substance's aqueous solution has excess hydrogen ions. What will happen to blue litmus?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Easy ScienceWhy can acid rain water be more corrosive than normal water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceIf washing soda is added to hard water, what is the main benefit of insoluble substance formation?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceIf acid is slowly added to a basic solution, what change is expected near neutralisation?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceA student says all bases dissolve in water. Which statement is the correct correction?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceWhich gas is passed over dry slaked lime in the manufacture of bleaching powder?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceA soil has pH 4.5. Which treatment is more scientific?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Easy