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Class 10 · Science
→An insoluble substance forms salt and water with acid. Why will it not be called an alkali?
Class 10 · Science
→Equal volumes of acid and base were mixed but the solution remained basic. What is the most suitable reason?
Class 10 · Science
→Equal volumes of acid and base were mixed but the solution remained acidic. What is the most suitable reason?
Class 10 · Science
→Why does pH increase when hydroxide ions are added to an acidic solution?
Class 10 · Science
→When acid is added to a basic solution, universal indicator changes from blue to green. What is the conclusion?
Class 10 · Science
→When a base is added to an acidic solution, universal indicator changes from red to green. What happened?
Class 10 · Science
→Turmeric becomes reddish-brown and red litmus turns blue. Which ion will be in excess in the solution?
Class 10 · Science
→If methyl orange is red and phenolphthalein is colourless, what should be added to neutralise the solution?
Class 10 · Science
→If phenolphthalein is pink and methyl orange is yellow, what is the nature of the solution?
Class 10 · Science
→What chemical risk can occur by storing curd in a copper vessel?
Class 10 · Science
→The pH of a lake decreases due to acid rain. Why is this dangerous for aquatic organisms?
Class 10 · Science
→How does acid rain damage the surface of marble?
Class 10 · Science
→What is the correct reason for adding organic matter to highly basic soil?
Class 10 · Science
→Why is slaked lime useful in treating acidic soil?
Class 10 · Science
→What is the chemical benefit of basic toothpaste for teeth?
Class 10 · Science
→Why is a mouth pH below 5.5 dangerous in tooth decay?
Class 10 · Science
→If baking powder contains only baking soda and no acidic substance, why can the taste of the food be affected?
Class 10 · Science
→What is the main reason for adding an acidic substance to baking powder?
Class 10 · Science
→What kind of solution is formed in water by the solid left after heating baking soda?
Class 10 · Science
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