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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।

ScienceWhich statement is correct when an acidic solution is diluted with water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium SciencePhenolphthalein turns pink in sodium hydroxide solution. The colour disappears when acid is added slowly. What is the reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceWhich substance is scientifically suitable to reduce the pain caused by a bee sting?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceWhat main products are formed when both metal carbonates and metal hydrogen carbonates react with acids?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceAmong hydrochloric acid and ethanoic acid of equal concentration, which acid shows higher electrical conductivity and why?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceIf a salt is formed from a strong acid and a weak base, how will its aqueous solution generally be?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceA student added dilute acid to sodium carbonate and passed the gas into lime water. Milkiness appeared first and then disappeared on passing excess gas. What is the correct reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Hard ScienceWhy does dry hydrogen chloride gas not affect dry litmus paper?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceIf the pH of a solution increases from 3 to 6, what happens to its acidity?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceWhy is it considered dangerous to add water to acid during dilution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceIf a solution turns red litmus blue and shows pH 10, what is the most correct conclusion?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Easy ScienceIf a solution has pH less than 7 and releases gas with a metal carbonate, what could the solution be?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Easy ScienceWhich pair reacts to form a salt and hydrogen gas?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceWhich pair will mainly form salt and water, but gas is not necessarily formed?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceWhich pair will react to form salt, water and carbon dioxide?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceWhen water is added to a basic solution, the number of hydroxide ions per unit volume decreases. What will be the effect on pH?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceWhen water is added to an acidic solution, the number of hydrogen ions per unit volume decreases. What will be the effect on pH?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceA universal indicator shows violet colour in a solution. What does this indicate?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceA universal indicator shows orange colour in a solution. What could be the nature of the solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceIf a substance solution feels soapy and turns red litmus blue, what type is it?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Easy