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Class 10 · Science
→Why does pH increase when hydroxide ions are added to an acidic solution?
Class 10 · Science
→If a solution showing red colour with universal indicator turns green after adding base, what is the conclusion?
Class 10 · Science
→If a solution showing blue colour with universal indicator turns green after adding acid, what happened?
Class 10 · Science
→The pH of a lake becomes very low due to acid rain. Why does risk to aquatic organisms increase?
Class 10 · Science
→A farmer's soil has pH 4.5. Which treatment is suitable?
Class 10 · Science
→How does washing soda help soften hard water?
Class 10 · Science
→Sodium carbonate solution is basic and gives a gas with acid. How will this gas be identified?
Class 10 · Science
→When copper oxide is added to dilute hydrochloric acid, a blue-green solution forms. What does this prove?
Class 10 · Science
→Why are non-metal oxides generally considered acidic?
Class 10 · Science
→Why are metal oxides generally considered basic?
Class 10 · Science
→A substance forms salt and water with acid but is insoluble in water. What is it called?
Class 10 · Science
→Equal volumes of acid and base are mixed, yet the solution remains basic. What is the most suitable reason?
Class 10 · Science
→Equal volumes of acid and base are mixed, yet the solution remains acidic. What is the most suitable reason?
Class 10 · Science
→Why does an acidic solution not immediately become basic even after strong dilution with water?
Class 10 · Science
→When sodium hydroxide is slowly added to an acidic solution, what is the main ionic change?
Class 10 · Science
→An acidic solution changes from pH 3 to pH 6. Approximately how much did the acidity decrease?
Class 10 · Science
→A solution changes from pH 12 to pH 10. What is the correct conclusion?
Class 10 · Science
→In a solution, turmeric becomes reddish-brown and red litmus turns blue. Which ion will be in excess?
Class 10 · Science
→Methyl orange is red and phenolphthalein is colourless in a solution. What should be added to neutralise it?
Class 10 · Science
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