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Class 10 · Science · Easy
→Which option contains a group of basic substances?
Class 10 · Science · Easy
→Which option contains a group of acidic substances?
Class 10 · Science · Hard
→A colourless solution conducts electricity, but the dry substance does not affect litmus. What condition is necessary for acidic behaviour?
Class 10 · Science · Hard
→Which treatment is most logical to get relief from the acid present in an ant sting?
Class 10 · Science · Medium
→Which substance is used to disinfect drinking water and can release chlorine?
Class 10 · Science · Medium
→The formation of only salt and water in an acid-base reaction best represents which idea?
Class 10 · Science · Medium
→Why can the purity of sodium hydroxide decrease when it is left exposed to air?
Class 10 · Science · Medium
→What happens to hydrogen-ion concentration when water is added to an acidic solution?
Class 10 · Science · Hard
→If an unknown salt solution has pH 9, what is its most probable formation condition?
Class 10 · Science · Medium
→Why is limewater useful for identifying carbon dioxide in the laboratory?
Class 10 · Science · Medium
→Which pair correctly lists products obtained from common salt in the chlor-alkali process?
Class 10 · Science · Medium
→Which observation provides experimental evidence that an acidic solution contains ions?
Class 10 · Science · Medium
→If the amount of hydroxide ions in a solution is increased, what will happen to its pH?
Class 10 · Science · Medium
→Sodium chloride is a salt formed from acidic and basic sources. Why is the pH of its aqueous solution about 7?
Class 10 · Science · Easy
→A solution has pH close to 14. Why can touching it be dangerous?
Class 10 · Science · Medium
→All bases are not soluble in water. Which statement is most correct?
Class 10 · Science · Medium
→In which situation is hydrogen gas most likely to be formed?
Class 10 · Science · Medium
→Why does heating gypsum at about 373 K produce plaster of Paris?
Class 10 · Science · Hard
→How many molecules of water of crystallisation are present in one molecule of washing soda?
Class 10 · Science · Medium
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