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Class 10 · Science · Easy
→Why may a cake not rise properly if too little baking powder is added?
Class 10 · Science · Medium
→Why is a mild acid mixed with baking soda in baking powder?
Class 10 · Science · Medium
→Which set of products is correct when baking soda is heated?
Class 10 · Science · Medium
→How does washing soda work in softening hard water?
Class 10 · Science · Easy
→How does the chemical nature of washing soda help in household cleaning?
Class 10 · Science · Easy
→White anhydrous copper sulphate turns blue when water drops are added. What does this prove?
Class 10 · Science · Medium
→Blue copper sulphate becomes white on heating. What causes this change?
Class 10 · Science · Medium
→What is the correct meaning of water of crystallisation?
Class 10 · Science · Medium
→Why is ammonium chloride solution acidic?
Class 10 · Science · Medium
→Why is an aqueous solution of sodium chloride generally neutral?
Class 10 · Science · Medium
→Sodium carbonate solution turns red indicator paper blue. What is the reason?
Class 10 · Science · Medium
→Why can the strength of sodium hydroxide decrease when it is left exposed to air?
Class 10 · Science · Medium
→How can adding organic manure improve highly basic soil?
Class 10 · Science · Medium
→Why does a farmer add slaked lime to highly acidic soil?
Class 10 · Science · Easy
→How does basic toothpaste help prevent tooth decay?
Class 10 · Science · Medium
→Tooth decay increases when the acidity value in the mouth becomes too low. What is the main reason?
Class 10 · Science · Easy
→Why does a mild basic substance give relief in indigestion caused by excess stomach acid?
Class 10 · Science · Medium
→At the same concentration, which will show a stronger acidic effect between hydrochloric acid and acetic acid?
Class 10 · Science · Easy
→Zinc oxide reacts with both acids and bases. Which property does this prove?
Class 10 · Science · Medium
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