Search questions
Choose which content to search, then combine terms with AND or OR.
Class 10 · Science · Medium
→When the pH of an acidic solution changes from 2 to 5, what happens to hydrogen ion concentration?
Class 10 · Science · Medium
→Which base is obtained during electrolysis of aqueous common salt solution?
Class 10 · Science · Hard
→Equal volumes of acid and base are mixed, but the solution remains basic. What is the most likely reason?
Class 10 · Science · Medium
→Methyl orange is yellow and turmeric is reddish-brown in a solution. What is the correct conclusion about this solution?
Class 10 · Science · Medium
→Copper oxide forms salt and water when added to dilute acid. What is the nature of copper oxide?
Class 10 · Science · Medium
→If copper metal does not give hydrogen gas with dilute acid, what is the most correct reason?
Class 10 · Science · Hard
→A basic solution changes from pH 14 to pH 11. Approximately how did its basicity change?
Class 10 · Science · Medium
→If hydroxide ions are slowly added to an acidic solution, why will its pH increase?
Class 10 · Science · Medium
→On heating baking soda, the remaining solid solution turns red litmus blue. What is the identity of the remaining solid?
Class 10 · Science · Medium
→The effect of acid rain on marble buildings is more evident because marble contains which substance?
Class 10 · Science · Medium
→Why does sodium chloride solution conduct electricity even though it is neutral?
Class 10 · Science · Medium
→To protect tooth enamel from dissolving, it is better to keep mouth pH above which limit?
Class 10 · Science · Medium
→A substance dissolves in water to form a basic solution and gives carbon dioxide with acid. What is the most suitable identification?
Class 10 · Science · Medium
→Why can sodium hydroxide pellets become wet and later impure in open air?
Class 10 · Science · Medium
→Methyl orange is red and phenolphthalein is colourless in a solution. What should be added to neutralise it?
Class 10 · Science · Medium
→Why is controlled heating of gypsum necessary?
Class 10 · Science · Medium
→How is the gas formed at the cathode in the chlor-alkali process tested?
Class 10 · Science · Hard
→A moist gas turns red litmus blue but has no effect on dry litmus. What is the most correct conclusion about the gas?
Class 10 · Science · Medium
→While diluting acid, why should acid be added to water instead of adding water to acid?
Class 10 · Science · Medium
→