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Class 10 · Science · Medium
→Why does white anhydrous copper sulphate turn blue again when water is added?
Class 10 · Science · Medium
→Why do blue copper sulphate crystals become white on heating?
Class 10 · Science · Easy
→Why is Plaster of Paris kept away from moisture?
Class 10 · Science · Medium
→Why is gypsum heated at a controlled temperature rather than at too high a temperature?
Class 10 · Science · Easy
→Why is bleaching powder used in cleaning drinking water?
Class 10 · Science · Medium
→Why can bleaching powder slowly lose its effectiveness when kept exposed?
Class 10 · Science · Medium
→Why is washing soda used to soften hard water?
Class 10 · Science · Medium
→What is the main difference between baking soda and baking powder?
Class 10 · Science · Medium
→Why is a mild acid mixed with baking soda in baking powder?
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
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