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Class 10 · Science · Medium
→In which case is electrical conductivity most likely to be highest?
Class 10 · Science · Medium
→Why does hydrochloric acid show stronger acidic effect than acetic acid at the same concentration?
Class 10 · Science · Medium
→If the soil of a field becomes too basic, which substance can be useful to add?
Class 10 · Science · Medium
→A farmer's soil is too acidic. What is the most suitable way to improve it for crops?
Class 10 · Science · Medium
→At which electrode is hydrogen produced in the chlor-alkali process?
Class 10 · Science · Medium
→At which electrode is chlorine produced in the chlor-alkali process?
Class 10 · Science · Medium
→Which is the correct set of products formed in the chlor-alkali process?
Class 10 · Science · Hard
→Gypsum forms plaster of Paris when heated at about 373 K. Why may the desired product not be obtained on excessive heating?
Class 10 · Science · Medium
→Why does plaster of Paris become hard when mixed with water?
Class 10 · Science · Easy
→Why is bleaching powder used to disinfect drinking water?
Class 10 · Science · Medium
→Why can bleaching powder give a chlorine-like smell when kept in moist air?
Class 10 · Science · Medium
→If dilute acid is added to an unknown solid and the evolved gas turns lime water milky, which ion is likely present in the solid?
Class 10 · Science · Medium
→Why is aluminium oxide called an amphoteric oxide?
Class 10 · Science · Medium
→Which gas can be released when sodium hydroxide reacts with zinc?
Class 10 · Science · Medium
→Phenolphthalein turns pink in sodium hydroxide. When hydrochloric acid is added slowly, when will the colour disappear?
Class 10 · Science · Easy
→What is the colour of methyl orange indicator in an acidic solution?
Class 10 · Science · Easy
→If a solution turns red litmus blue and phenolphthalein pink, what is its likely pH?
Class 10 · Science · Easy
→In which reaction is carbon dioxide gas most likely to be evolved?
Class 10 · Science · Medium
→Which pair will react to form calcium sulphate and water?
Class 10 · Science · Medium
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