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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
→Why does dry hydrogen chloride gas not change the colour of dry blue litmus paper?
Class 10 · Science · Easy
→Why should acids or bases not be identified by taste in a laboratory?
Class 10 · Science · Easy
→Why is it unsafe to store curd in a copper vessel?
Class 10 · Science · Easy
→Why is slaked lime added to acidic soil?
Class 10 · Science · Easy
→How does basic toothpaste protect teeth?
Class 10 · Science · Easy
→Below which pH does the risk of tooth decay increase?
Class 10 · Science · Easy
→Which gas is formed at the cathode in the chlor-alkali process?
Class 10 · Science · Easy
→Which gas is formed at the anode in the chlor-alkali process?
Class 10 · Science · Easy
→What are the main products obtained in the chlor-alkali process?
Class 10 · Science · Easy
→The chlor-alkali process is done by electrolysis of what?
Class 10 · Science · Easy
→What is the main solid product formed on heating baking soda?
Class 10 · Science · Easy
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