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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।

ScienceRed litmus turns blue in a solution, and after adding acid both red and blue litmus show no change. What is the nature of the final solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceIf a substance forms salt and water with an acid but is insoluble in water, how should it be classified?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceThe gas released on heating baking soda turns lime water milky. What is the identity of the gas?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceIn an industrial process, three products are obtained from brine. One of them is a base useful in paper and soap industries. Which base is it?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceIf equal volumes of an acid and a base are mixed but the pH does not become 7, what could be a possible reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium SciencePhenolphthalein becomes pink and turmeric becomes reddish-brown in a solution. Which ion is likely to be in excess?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceSodium hydroxide kept in open air can be affected not only by moisture but also by carbon dioxide. Which substance can form?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceIf copper oxide is added to dilute hydrochloric acid, a blue-green solution may form. What nature does this prove?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceA solution had pH 3 and after dilution it became pH 5. By how much did the hydrogen ion concentration decrease?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Hard ScienceThe temperature rises slightly when sodium hydroxide is added to an acidic solution. What is the reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceWhy does baking powder not react vigorously in dry state even though it contains baking soda and an acidic substance?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Hard ScienceMethyl orange is red in a solution, but it becomes yellow when base is added slowly. What does this show?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceA student says carbon dioxide is not an acid, so it cannot react with a base. What is the correct evaluation?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceLime is added to an acidic lake and the pH of water increases. Which process is this an example of?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceFrom the pH point of view, why is cleaning the mouth after meals useful for teeth?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceWhen hard water is mixed with aqueous washing soda, hardness decreases. What is the main reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceIf one metal gives no gas with an acid and another metal gives gas rapidly with the same acid, what is the correct basis of comparison?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceAmmonium chloride solution can turn blue litmus red. What is the most appropriate reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceIf hydrogen ions are much more numerous than hydroxide ions in a solution, which colour is more likely with universal indicator?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Easy ScienceWhen gypsum is heated at a controlled temperature, how much water remains in the product formed?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium