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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।

ScienceIf a gas turns moist red litmus blue but has no effect on dry red litmus, what is the conclusion about the gas?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceWhy can the bleaching property of bleaching powder decrease when it is kept in a moist open place?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Hard ScienceWhy does pH increase when hydroxide ions are added to an acidic solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceThe pH of a lake decreases due to acid rain. Adding lime raises the pH. What type of process is this?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceOn strong heating of baking soda, the gas evolved turns lime water milky. What is the name of the remaining solid?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceA solution has pH 13. After adding water, its pH becomes 11. What is the correct conclusion?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceHow can sodium hydroxide form sodium carbonate when kept in open air?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceTurmeric turns reddish-brown and red litmus turns blue in a solution. Which ion is likely to be in excess?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Easy ScienceIf equal volumes of acid and base are mixed but the solution remains acidic, which reason may be correct?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium SciencePhenolphthalein is pink and methyl orange is yellow in a solution. What is the nature of the solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Easy ScienceWhy can excessive heating of gypsum reduce the quality of plaster of Paris?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Hard ScienceBaking powder produces carbon dioxide in moist dough but generally does not react strongly in a dry container. What is the best reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceA blue crystalline salt becomes white on heating and turns blue again on adding water. What does this prove?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceWhy can there be a problem in the chlor-alkali process if the products are not kept separate?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Hard ScienceA solution turns red litmus blue and does not release carbon dioxide when acid is added. Which substance is most likely?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceA dilute acid is added to a white solid and the gas turns lime water milky. If excess gas removes the milkiness, which sequence is correct?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceAmong two acids of equal concentration, the first is a better conductor of electricity. Based on this, what can the first acid be like?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceA salt solution shows pH 6 and turns blue litmus slightly red. From what may this salt be formed?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Hard ScienceAn acidic solution has pH 2. If it is made ten thousand times less acidic, what will be the approximate new pH?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Hard ScienceA solution gives red colour with universal indicator. After adding water the colour becomes yellow but not green. What is the correct conclusion?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium