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Class 10 · Science
→Which salt is most likely to give an acidic solution when dissolved in water?
Class 10 · Science
→A gas released from a carbonate sample with acid is passed into lime water for a long time. Why can the final solution become clear again?
Class 10 · Science
→What is the main reason for the different effect of dry hydrogen chloride and moist hydrogen chloride on litmus?
Class 10 · Science
→If the pH of a solution is brought from 11 close to 7, which ion is being effectively reduced?
Class 10 · Science
→A solution gives green colour with universal indicator. When a small amount of acid is added, the colour becomes yellow. What does this show?
Class 10 · Science
→Of two colourless solutions, the first gives a gas with magnesium and the second turns red litmus blue. What is the correct identification?
Class 10 · Science
→If a student says acids are always dangerous and bases are always safe, what is the correct response?
Class 10 · Science
→Which statement correctly differentiates the uses of baking soda and washing soda?
Class 10 · Science
→In an experiment, dry litmus is unaffected, but the same gas changes moist litmus colour. What is the best conclusion?
Class 10 · Science
→A little base is added to an acidic solution, so pH increases but complete neutralisation does not occur. Why?
Class 10 · Science
→If a salt is obtained from seawater and used to make chlorine and sodium hydroxide, which common salt is it?
Class 10 · Science
→A substance dissolves in water, turns red litmus blue, and feels soapy. Which ion will mainly be present?
Class 10 · Science
→Why is the gas formed by adding a metal to an acid not obtained with every metal?
Class 10 · Science
→Which substance dissolves in water to form a basic solution and also releases carbon dioxide with an acid?
Class 10 · Science
→If the amounts of hydrogen ions and hydroxide ions in a solution are nearly balanced, what will its pH be like?
Class 10 · Science
→How does the gas formed when sodium hydrogen carbonate reacts with an acid help food rise?
Class 10 · Science
→A student says that pH zero means there is no acid. What is the correct evaluation?
Class 10 · Science
→If plant growth is poor in acidic soil, which substance can be carefully used to improve its pH?
Class 10 · Science
→Which option is most appropriate for the safe storage of acids and bases?
Class 10 · Science
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