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Class 10 · Science · Medium
→To prepare bleaching powder, chlorine is passed over which substance?
Class 10 · Science · Medium
→What is the correct meaning of water of crystallisation?
Class 10 · Science · Medium
→Why does the blue colour of copper sulphate disappear on heating?
Class 10 · Science · Medium
→What causes the blue colour of copper sulphate crystals?
Class 10 · Science · Medium
→Why does plaster of Paris harden when water is added?
Class 10 · Science · Medium
→What is the chemical name of plaster of Paris?
Class 10 · Science · Medium
→Plaster of Paris is prepared by controlled heating of which substance?
Class 10 · Science · Medium
→How does washing soda soften hard water?
Class 10 · Science · Easy
→What is the chemical name of washing soda?
Class 10 · Science · Medium
→Why is an acidic substance mixed with baking soda in baking powder?
Class 10 · Science · Medium
→What is the main solid product formed on heating baking soda?
Class 10 · Science · Easy
→What is the chemical name of baking soda?
Class 10 · Science · Easy
→What colour does methyl orange show in a basic solution?
Class 10 · Science · Easy
→What colour does methyl orange show in an acidic solution?
Class 10 · Science · Easy
→What colour does phenolphthalein show in a basic solution?
Class 10 · Science · Easy
→Turmeric becomes reddish-brown in contact with what type of substance?
Class 10 · Science · Medium
→Copper oxide reacts with acid to form salt and water. What nature does this prove?
Class 10 · Science · Medium
→Why is carbon dioxide considered an acidic oxide?
Class 10 · Science · Easy
→What is the general nature of non-metal oxides?
Class 10 · Science · Easy
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