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Class 10 · Science · Medium
→What type of substance would help reduce irritation caused by a nettle leaf sting?
Class 10 · Science · Medium
→Why is baking soda applied for relief from the acidic substance in an ant sting?
Class 10 · Science · Medium
→Why does acid rain slowly damage marble monuments?
Class 10 · Science · Medium
→Why can bubbles form when acid falls on marble?
Class 10 · Science · Medium
→How is carbon dioxide produced in a soda-acid fire extinguisher?
Class 10 · Science · Medium
→A solution conducts electricity well, but the same substance in dry state does not. What is the most suitable reason?
Class 10 · Science · Medium
→Why does methyl orange show different colours in acidic and basic media?
Class 10 · Science · Medium
→Phenolphthalein is pink in a basic solution. What does becoming colourless on adding acid indicate?
Class 10 · Science · Medium
→The temperature rises when equal amounts of acid and base are mixed. What is the reason?
Class 10 · Science · Medium
→If the pH value of an acidic solution increases but remains below seven, what does it mean?
Class 10 · Science · Medium
→Why does the acidic effect decrease when an acidic solution is diluted with water?
Class 10 · Science · Medium
→Why should acid be slowly added to water while diluting an acid?
Class 10 · Science · Medium
→Gypsum forms plaster of Paris on controlled heating. What is the main change?
Class 10 · Science · Medium
→Why is plaster of Paris kept away from moisture?
Class 10 · Science · Medium
→Where is hydrogen gas obtained in the chlor-alkali process?
Class 10 · Science · Medium
→Where is chlorine obtained in the chlor-alkali process?
Class 10 · Science · Medium
→Which correct product set is obtained by electrolysis of brine in the chlor-alkali process?
Class 10 · Science · Medium
→Why is bleaching powder useful for disinfecting drinking water?
Class 10 · Science · Medium
→What is the main reason for storing bleaching powder in a closed container?
Class 10 · Science · Medium
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