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Class 10 · Science · Medium
→What is the correct reason for adding organic matter to highly basic soil?
Class 10 · Science · Medium
→Why is slaked lime useful in treating acidic soil?
Class 10 · Science · Medium
→What is the chemical benefit of basic toothpaste for teeth?
Class 10 · Science · Medium
→Why is a mouth pH below 5.5 dangerous in tooth decay?
Class 10 · Science · Medium
→If baking powder contains only baking soda and no acidic substance, why can the taste of the food be affected?
Class 10 · Science · Medium
→What is the main reason for adding an acidic substance to baking powder?
Class 10 · Science · Medium
→What kind of solution is formed in water by the solid left after heating baking soda?
Class 10 · Science · Medium
→How will the gas formed on heating baking soda be confirmed?
Class 10 · Science · Medium
→Where is sodium hydroxide obtained in the chlor-alkali process?
Class 10 · Science · Medium
→What is the correct order of gases formed at anode and cathode in the chlor-alkali process?
Class 10 · Science · Medium
→Sugar solution does not conduct electricity but sodium chloride solution does. What is the reason?
Class 10 · Science · Medium
→Why does a salt solution conduct electricity even though it is neutral?
Class 10 · Science · Medium
→Blue copper sulphate became white on heating and turned blue again on adding water. What was proved?
Class 10 · Science · Medium
→Why can the quality of plaster of Paris be spoiled by overheating gypsum?
Class 10 · Science · Medium
→What is the scientific reason for storing bleaching powder in a dry closed container?
Class 10 · Science · Medium
→Why does sodium hydroxide not remain pure when kept in open air?
Class 10 · Science · Medium
→If water is suddenly added to concentrated acid, what is the main danger?
Class 10 · Science · Medium
→Why is it safe to add acid slowly into water?
Class 10 · Science · Hard
→Why does the milkiness of lime water disappear when excess carbon dioxide is passed?
Class 10 · Science · Medium
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