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

ScienceA basic solution changes from pH 13 to pH 10. Approximately how did its basicity change?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Hard ScienceWhy does pH increase when hydroxide ions are added to an acidic solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Medium ScienceOn heating baking soda, the aqueous solution of the remaining solid is basic. What is the name of the remaining solid?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Medium ScienceAcid rain affects marble mainly because of which substance in marble?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Medium ScienceWhy is aqueous sodium chloride electrically conducting even though it is neutral?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Medium ScienceBelow which pH range is the risk of tooth enamel dissolving considered higher?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Easy ScienceAn unknown substance dissolves in water to give a basic solution and gives a gas with acid that turns lime water milky. Which substance could it be?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Medium ScienceWhat are the two main reasons for sodium hydroxide becoming wet and less pure in open air?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Medium ScienceMethyl orange is red and phenolphthalein is colourless in a solution. Which substance is suitable to neutralise it?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Medium ScienceGypsum forms plaster of Paris on controlled heating. What problem can occur on excessive heating?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Medium ScienceWhich gas is formed at the cathode in the chlor-alkali process and how is it identified?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Medium ScienceA gas turns moist red litmus blue but has no effect on dry red litmus. What is the correct conclusion about the gas?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Medium ScienceWhy is it considered safe to add acid slowly into water during dilution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Easy ScienceTwo acids have the same concentration. The first acid shows higher electrical conductivity. Which conclusion is more correct?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Medium ScienceA gas turns lime water milky and in excess removes the milkiness. This gas is most likely formed from what?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Medium ScienceA salt solution shows pH 10. From which type of acid and base is it more likely formed?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Hard ScienceThe pH of a solution changes from 2 to 5. What happens to the hydrogen ion concentration?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Hard ScienceA solution turns blue litmus red but the same substance in dry form has no effect on litmus. What is the most appropriate reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 15Medium ScienceWhy is it not correct to identify a colourless solution as acid or base only by looking at it?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Easy ScienceWhy does an acidic solution not always become basic immediately even after strong dilution with water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium