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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।

ScienceSugar solution does not conduct electricity but sodium chloride solution does. What is the reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceWhy does a salt solution conduct electricity even though it is neutral?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceBlue copper sulphate became white on heating and turned blue again on adding water. What was proved?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceWhy can the quality of plaster of Paris be spoiled by overheating gypsum?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceWhat is the scientific reason for storing bleaching powder in a dry closed container?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceWhy does sodium hydroxide not remain pure when kept in open air?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceIf water is suddenly added to concentrated acid, what is the main danger?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceWhy is it safe to add acid slowly into water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceWhy does the milkiness of lime water disappear when excess carbon dioxide is passed?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Hard ScienceHow is the gas formed in the reaction of an acid with hydrogen carbonate confirmed?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceA substance gives carbon dioxide with acid and its solution is basic. Which substance can it be?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceWhy does copper generally not give hydrogen gas with dilute acids?Class 10Chemical Substances – Nature and BehaviourMetals and Non-metalsLevel 14Medium ScienceA metal gives a gas with acid and the gas gives a pop sound near a burning splint. Which conclusion about the metal is correct?Class 10Chemical Substances – Nature and BehaviourMetals and Non-metalsLevel 14Medium ScienceAmmonia turns moist red litmus blue but not dry red litmus. What does this show?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceDry hydrogen chloride gas has no effect on dry litmus but turns blue litmus red after dissolving in water. What is the reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceWhy does hydrochloric acid show a stronger acidic effect than ethanoic acid at the same concentration?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceTwo acids of equal concentration are compared and the first shows higher electrical conductivity. Which conclusion is correct?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceThe pH of a solution changes from 4 to 2. What happened to the hydrogen-ion concentration?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Hard ScienceAn acidic solution is diluted ten times. If the initial pH was 3, what will be the approximate new pH?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Hard ScienceAn unknown white solid reacts with acid to give carbon dioxide, and its aqueous solution is basic. Which solid is most likely?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium