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Class 10 · Science
→A solution turns blue litmus red but the same substance in dry form has no effect on litmus. What is the most appropriate reason?
Class 10 · Science
→Why is it not correct to identify a colourless solution as acid or base only by looking at it?
Class 10 · Science
→Why does an acidic solution not always become basic immediately even after strong dilution with water?
Class 10 · Science
→For preparing bleaching powder, chlorine gas is passed over which substance?
Class 10 · Science
→A substance forms salt and water with acid but is insoluble in water. What is it called?
Class 10 · Science
→If sodium hydroxide is slowly added to an acidic solution, what main ionic change occurs during neutralisation?
Class 10 · Science
→A student says carbonates give hydrogen with acids. What is the correct correction?
Class 10 · Science
→A solution giving blue colour with universal indicator turns green after acid is added. What does this mean?
Class 10 · Science
→What is the correct reason for avoiding storage of curd in a copper vessel?
Class 10 · Science
→Why is the aqueous solution of non-metal oxides often acidic?
Class 10 · Science
→Why are metal oxides generally considered basic?
Class 10 · Science
→One solution turns red litmus blue and another turns blue litmus red. What will be the main products when they are mixed?
Class 10 · Science
→Why is acid rain harmful to aquatic organisms?
Class 10 · Science
→If a solution shows pH 13, what precaution is correct while handling it?
Class 10 · Science
→Which statement about the nature of salts is correct?
Class 10 · Science
→Why does pH increase when slaked lime is added to acidic soil?
Class 10 · Science
→The pH of an acidic solution changes from 3 to 6. What happens to acidity?
Class 10 · Science
→Why is it wrong to identify an acid by taste in the laboratory?
Class 10 · Science
→The milkiness of lime water appears due to formation of which insoluble compound?
Class 10 · Science
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