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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।

ScienceWhy does white anhydrous copper sulphate turn blue again when water is added?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9MediumScienceWhy do blue copper sulphate crystals turn white on heating?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9MediumScienceWhich is the most correct meaning of water of crystallisation?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9EasyScienceHow does washing soda help in softening hard water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9MediumScienceWhat is the chemical name of washing soda?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9EasyScienceWhy does baking powder help cakes rise?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9MediumScienceWhat main change occurs when baking soda is heated?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9MediumScienceWhat is the main use of the bleaching substance formed by the reaction of sodium hydroxide and chlorine?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9MediumScienceWhy can sodium hydroxide slowly form carbonate when left open in air?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9MediumScienceWhy is toothpaste generally made mildly basic?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9EasyScienceTooth decay damages enamel more when the pH falls below which approximate value?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9MediumScienceAn agricultural soil has become too acidic. Which substance is useful to improve it?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9EasyScienceWhy is the pH of pure water considered around seven?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9EasyScienceIf a solution has a very low pH value, which statement is correct about it?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9EasyScienceWhich pair contains two substances of basic nature?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9EasyScienceWhy does a turmeric stain become reddish-brown when soap is applied?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9EasyScienceWhat change occurs when red litmus is added to a sodium hydroxide solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9EasyScienceHow does an antacid give relief during stomach irritation due to excess acidity?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9EasyScienceA bee sting contains an acidic substance. Which substance is more suitable to reduce the pain?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9EasyScienceWhen proper amounts of an acid and a base are mixed, which reaction mainly occurs?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Easy