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Class 10 · Science · Medium
→While diluting a concentrated acid, acid should be added slowly to water. What is the main reason?
Class 10 · Science · Medium
→What is the best reason for considering non-metal oxides as acidic oxides?
Class 10 · Science · Medium
→Why are metal oxides generally called basic oxides?
Class 10 · Science · Medium
→When hydrochloric acid is slowly added to sodium hydroxide solution, how will the pH of the solution change?
Class 10 · Science · Easy
→A student thinks that only water is formed in an acid-base reaction. Why is this idea incomplete?
Class 10 · Science · Medium
→A gas is evolved when magnesium ribbon is added to dilute sulphuric acid. Which test is most suitable to identify this gas?
Class 10 · Science · Hard
→Two solutions X and Y have pH values 3 and 11 respectively. Which statement is correct?
Class 10 · Science · Expert
→A gas produced by adding dilute hydrochloric acid to sodium carbonate solution is passed through limewater. Why does limewater first turn milky and then become clear when excess gas is passed?
Class 10 · Science · Hard
→If dry hydrogen chloride gas is passed over dry blue litmus paper, which conclusion is most correct?
Class 10 · Science · Easy
→Why should acids or bases not be identified by tasting them in a laboratory?
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 carried out by electrolysis of what?
Class 10 · Science · Easy
→What is the main solid product formed when baking soda is heated?
Class 10 · Science · Easy
→How does baking powder help food rise?
Class 10 · Science · Easy
→Which gas does baking soda give on reacting with an acid?
Class 10 · Science · Easy
→Washing soda softens hard water by removing which ions?
Class 10 · Science · Easy
→What is meant by water of crystallisation?
Class 10 · Science · Easy
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