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Class 10 · Science
→Magnesium produces a gas when added to an acidic solution. If sodium carbonate is added to the same solution, which other gas will be released?
Class 10 · Science
→Which property of bleaching powder makes it useful for whitening clothes?
Class 10 · Science
→Under which condition can carbon dioxide remove the milkiness of lime water?
Class 10 · Science
→Why does an aqueous solution of sodium chloride conduct electricity even though it may be neutral?
Class 10 · Science
→Why does pH increase when hydroxide ions are added to an acidic solution?
Class 10 · Science
→If a salt is formed from a strong base and a weak acid, what effect will its aqueous solution generally show on red litmus?
Class 10 · Science
→A solution shows pH 11, but after adding much water its pH becomes 9. What does this correctly mean?
Class 10 · Science
→Which substance can absorb an acidic gas and form a salt?
Class 10 · Science
→Blue litmus turns red in a solution, and bubbles form when chalk powder is added to it. What is the correct conclusion?
Class 10 · Science
→Why is there a risk of harmful substances forming when lemon juice is stored in a copper vessel?
Class 10 · Science
→On heating a sample, water droplets appear and its colour changes. This may identify what kind of salt?
Class 10 · Science
→What will be the nature of sodium carbonate formed by heating baking soda?
Class 10 · Science
→The gas from an acid-metal reaction is collected in soap bubbles and burns with a pop sound. What does this confirm?
Class 10 · Science
→If a student first takes acid in a beaker and then adds water while diluting acid, what is the main mistake?
Class 10 · Science
→Why can relief methods for an ant sting and a scorpion sting be different?
Class 10 · Science
→Why would it be wrong to call a solution with pH 8 neutral?
Class 10 · Science
→What can happen to setting if too much water is used while making a plaster of Paris statue?
Class 10 · Science
→A sample turns red litmus blue but does not give carbon dioxide when acid is added. What could it be?
Class 10 · Science
→Which statement correctly relates acid rain and carbonate rocks?
Class 10 · Science
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