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Acids

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

ScienceWhich substance obtained from common salt is useful as an important base in paper and soap industries?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceEqual volumes of an acid and a base are mixed, but pH does not become 7. Which reason is most scientific?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Hard ScienceMethyl orange is yellow and phenolphthalein is pink in a solution. Which ion is likely to be in excess?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceCopper oxide forms a coloured salt solution when added to dilute acid. What nature of copper oxide is shown?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceBaking powder does not react strongly when dry but gives gas in moist dough. What is the main reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceMagnesium and copper are separately added to an acid. Magnesium gives bubbles but copper does not. What is the correct reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceIf the pH of a basic solution changes from 13 to 11, approximately how did its basicity change?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Hard ScienceIf hydroxide ions are added to an acidic solution, what change will occur first?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceThe solid formed on heating baking soda gives a basic aqueous solution. Which solid is it?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceThe effect of acid rain on marble is due to which reaction?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceWhy does sodium chloride solution conduct electricity even though its pH is near 7?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceA solution has pH below 5.5. What is the most correct meaning in the context of teeth?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceA substance dissolves in water, turns red litmus blue, and gives carbon dioxide with acid. Which substance could it be?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceWhich two factors can reduce the quality of sodium hydroxide when it is kept in open air?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceIf phenolphthalein is added to an acidic solution and then a base is added slowly, when will the pink colour appear?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceWhen gypsum is heated under controlled conditions, plaster of Paris is formed. How does the water content change?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceWhat is one important use of the gas formed at the anode in the chlor-alkali process?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceWashing soda crystals become powdery when kept in open air. This is related to which phenomenon?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceWhy does hydrochloric acid have a lower pH than ethanoic acid at the same concentration?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceA gas first turns lime water milky and removes the milkiness when passed in excess. Which soluble substance forms in excess?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium