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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।

ScienceAn unknown solid gives water droplets and changes colour on heating. Its colour returns after adding water. This indicates the presence of what?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceWhich statement correctly explains the difference between a strong base and a concentrated base?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceWhy does the risk of splashing increase when an acid is mixed with water very quickly?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceWhy is the membrane considered important in the chlor-alkali process?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Hard ScienceA sample gives carbon dioxide with acid and its aqueous solution turns red litmus blue. Which substance is most likely?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceAn aqueous solution of a salt turns red litmus blue. From which pair is this salt more likely to be formed?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceIf the pH of a basic solution changes from 12 to 9, which statement about the effect of hydroxide ions is most correct?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Hard ScienceA student passes dry hydrogen chloride over dry blue litmus and observes no change. The same gas turns moist blue litmus red. What is the correct reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Hard ScienceTwo solutions have pH values 2 and 6 respectively. How much greater is the hydrogen ion concentration in the first solution than in the second?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Hard ScienceA solution gives one gas with zinc and another gas with sodium carbonate. What is the correct identification of both gases?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Hard ScienceA student says all acids give the same amount of hydrogen gas with metals. Why is this statement wrong?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Hard ScienceIf a basic substance is highly soluble in water and can burn skin, how should it be used in the laboratory?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceIf a solution has more hydroxide ions and fewer hydrogen ions, what colour may universal indicator show?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceWhen an acidic solution is neutralised by a base, what determines the nature of the salt formed?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceWhich substance is important in both disinfecting and bleaching uses?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceA solution is diluted slowly, but its pH does not move far from 7 because it was already neutral. Which solution could it be?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceMethyl orange is red and phenolphthalein is colourless in a solution. What is the nature of the solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceWhich statement about chemical products related to common salt is correct?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Hard ScienceWhat is a water-soluble base called?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Easy ScienceLime is added to improve acidic soil. What problem can occur if too much lime is added?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium