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Class 10 · Science · Medium
→On what basis do olfactory indicators help identify acids and bases?
Class 10 · Science · Medium
→In an acid-base reaction, if an indicator stops changing colour, what condition may it indicate?
Class 10 · Science · Medium
→Metal oxides react with acids to form salt and water. What nature does this prove?
Class 10 · Science · Medium
→Why are non-metal oxides called acidic oxides?
Class 10 · Science · Medium
→What is the usual nature of an aqueous solution of sodium carbonate?
Class 10 · Science · Medium
→What is the usual nature of an aqueous solution of ammonium chloride?
Class 10 · Science · Medium
→Why is an aqueous solution of sodium chloride nearly neutral?
Class 10 · Science · Medium
→On what can the pH of a salt depend?
Class 10 · Science · Medium
→Why is plaster of Paris stored away from moisture?
Class 10 · Science · Medium
→Which substance is formed when gypsum is heated at about 373 K?
Class 10 · Science · Easy
→Which statement about water of crystallisation is correct?
Class 10 · Science · Medium
→Why does the blue colour return when water is added to white copper sulphate?
Class 10 · Science · Medium
→Why does adding washing soda to hard water help in washing?
Class 10 · Science · Easy
→The formula of washing soda shows sodium carbonate decahydrate. What does the word decahydrate indicate?
Class 10 · Science · Medium
→Why can excess use of only baking soda give a bitter taste to cake?
Class 10 · Science · Medium
→What is the main difference between baking soda and baking powder?
Class 10 · Science · Medium
→Which main gaseous product is formed when baking soda is heated?
Class 10 · Science · Easy
→Why is bleaching powder used to remove colour from coloured substances?
Class 10 · Science · Medium
→Which gas is passed over dry slaked lime in the preparation of bleaching powder?
Class 10 · Science · Easy
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