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Class 10 · Science · Medium
→What is the main benefit of adding a mild edible acid with baking soda in baking powder?
Class 10 · Science · Medium
→Why can sodium hydrogen carbonate be used in fire extinguishers?
Class 10 · Science · Medium
→An antacid taken for excess stomach acid works on which principle?
Class 10 · Science · Medium
→The condition that damages tooth enamel is related to which of the following?
Class 10 · Science · Medium
→Which substance can be added to basic soil so that acidic substances may gradually form?
Class 10 · Science · Medium
→Which substance is most suitable for treating acidic soil?
Class 10 · Science · Medium
→Which substance will react with an acid to give carbon dioxide instead of hydrogen?
Class 10 · Science · Medium
→A metal and an acid react to form a salt and hydrogen gas. If the metal is magnesium and the acid is sulphuric acid, which salt will be formed?
Class 10 · Science · Medium
→The gas formed in an acid and metal carbonate reaction can make lime water clear again when passed in excess. What is the reason?
Class 10 · Science · Medium
→Phenolphthalein turns pink and methyl orange turns yellow in a solution. What is the nature of this solution?
Class 10 · Science · Easy
→In a solution, red litmus turns blue, but blue litmus shows no change. What type of solution is it?
Class 10 · Science · Easy
→In a solution, blue litmus turns red, but red litmus shows no change. What is the nature of the solution?
Class 10 · Science · Medium
→If a basic solution has pH 13, in which direction will it change when water is added?
Class 10 · Science · Medium
→If two acidic solutions have pH values 2 and 4 respectively, which one has a higher concentration of hydrogen ions?
Class 10 · Science · Easy
→In which pair can both substances show acidic nature?
Class 10 · Science · Easy
→In which pair can both substances show basic nature?
Class 10 · Science · Easy
→In which pair is the first substance acidic and the second substance basic?
Class 10 · Science · Easy
→If the pH value increases from 7 to 11, what will be the nature of the solution?
Class 10 · Science · Medium
→If the pH value decreases from 7 to 3, what change occurs in the nature of the solution?
Class 10 · Science · Medium
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