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Class 10 · Science · Easy
→The main active component of bleaching powder is formed due to which gas?
Class 10 · Science · Easy
→Why is plaster of Paris used to support a fractured bone?
Class 10 · Science · Medium
→Why is plaster of Paris kept in a closed container away from moisture?
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 turn white on heating?
Class 10 · Science · Easy
→Which is the most correct meaning of water of crystallisation?
Class 10 · Science · Medium
→How does washing soda help in softening hard water?
Class 10 · Science · Easy
→What is the chemical name of washing soda?
Class 10 · Science · Medium
→Why does baking powder help cakes rise?
Class 10 · Science · Medium
→What main change occurs when baking soda is heated?
Class 10 · Science · Medium
→What is the main use of the bleaching substance formed by the reaction of sodium hydroxide and chlorine?
Class 10 · Science · Medium
→Why can sodium hydroxide slowly form carbonate when left open in air?
Class 10 · Science · Easy
→Why is toothpaste generally made mildly basic?
Class 10 · Science · Medium
→Tooth decay damages enamel more when the pH falls below which approximate value?
Class 10 · Science · Easy
→An agricultural soil has become too acidic. Which substance is useful to improve it?
Class 10 · Science · Easy
→Why is the pH of pure water considered around seven?
Class 10 · Science · Easy
→If a solution has a very low pH value, which statement is correct about it?
Class 10 · Science · Easy
→Which pair contains two substances of basic nature?
Class 10 · Science · Easy
→Why does a turmeric stain become reddish-brown when soap is applied?
Class 10 · Science · Easy
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