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Class 10 · Science · Medium
→Which gas is released on heating baking soda and turns lime water milky?
Class 10 · Science · Medium
→Why is the pH of an aqueous solution of common salt approximately 7?
Class 10 · Science · Medium
→Why does phenolphthalein turn pink in sodium carbonate solution?
Class 10 · Science · Easy
→Which salt is formed in the reaction between sodium hydroxide and hydrochloric acid?
Class 10 · Science · Medium
→Which substance can help reduce excessive basicity of basic soil?
Class 10 · Science · Easy
→Which substance can be suitable to treat acidic soil for farming?
Class 10 · Science · Easy
→How does a basic toothpaste help after eating food?
Class 10 · Science · Medium
→To prevent tooth decay, it is better for the pH of the mouth to remain above about which value?
Class 10 · Science · Medium
→Which aqueous solution is expected to produce the highest amount of hydroxide ions?
Class 10 · Science · Medium
→Why is hydrochloric acid considered stronger than ethanoic acid at equal concentration?
Class 10 · Science · Medium
→If two solutions have pH values 2 and 5 respectively, which solution is more acidic?
Class 10 · Science · Hard
→If the pH of a solution increases from 3 to 6, what happens to its acidic nature?
Class 10 · Science · Medium
→In which situation will phenolphthalein turn from colourless to pink?
Class 10 · Science · Medium
→An unknown solution turns red litmus blue and turmeric reddish brown. What is the nature of the solution?
Class 10 · Science · Hard
→Why can milky lime water become clear again when excess carbon dioxide is passed through it?
Class 10 · Science · Medium
→How can the gas formed when dilute acid is added to sodium carbonate be confirmed?
Class 10 · Science · Medium
→If zinc is added to an acidic solution and a gas is evolved, what is the correct identification of that gas?
Class 10 · Science · Hard
→Why is it considered safer to add acid slowly to water during dilution?
Class 10 · Science · Hard
→Why do dilute acids conduct electricity?
Class 10 · Science · Expert
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