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Class 10 · Science · Medium
→How does carbon dioxide help in putting out fire in a soda-acid fire extinguisher?
Class 10 · Science · Medium
→What change may be seen in a hydrated salt when water of crystallisation is removed?
Class 10 · Science · Medium
→Why does white anhydrous copper sulphate become blue again when water is added?
Class 10 · Science · Medium
→Why do blue copper sulphate crystals become white on heating?
Class 10 · Science · Medium
→Which salt is used to soften permanently hard water?
Class 10 · Science · Medium
→Why is Plaster of Paris formed when gypsum is heated carefully?
Class 10 · Science · Medium
→Why is washing soda useful for softening hard water?
Class 10 · Science · Medium
→Which names correctly identify baking soda and washing soda, respectively?
Class 10 · Science · Medium
→Why is a mild edible acid mixed with baking soda in baking powder?
Class 10 · Science · Medium
→How does baking soda help food rise on heating?
Class 10 · Science · Medium
→Which gas reacts with slaked lime to make bleaching powder?
Class 10 · Science · Medium
→Why is bleaching powder useful for disinfecting water?
Class 10 · Science · Medium
→Which base remains in the solution during the chlor-alkali process?
Class 10 · Science · Medium
→What is the correct order of the gas formed at the anode and the gas formed at the cathode in the chlor-alkali process?
Class 10 · Science · Medium
→Which process is used to prepare sodium hydroxide from sodium chloride?
Class 10 · Science · Medium
→How can adding organic matter help improve basic soil?
Class 10 · Science · Medium
→Why do farmers add slaked lime to acidic soil?
Class 10 · Science · Medium
→Why can applying a mild baking-soda solution to an ant sting provide relief?
Class 10 · Science · Medium
→What is the main purpose of keeping toothpaste mildly basic?
Class 10 · Science · Medium
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