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Class 10 · Science · Medium
→A bee sting is described as containing an acidic substance. Which substance is most suitable for helping to reduce its effect?
Class 10 · Science · Medium
→Why is it dangerous to touch sodium hydroxide with bare hands?
Class 10 · Science · Medium
→Which substance is used to soften hard water?
Class 10 · Science · Hard
→Gypsum forms plaster of Paris on controlled heating. If it is overheated, what main problem may occur?
Class 10 · Science · Medium
→Which is the formula of plaster of Paris?
Class 10 · Science · Easy
→What is the formula of washing soda?
Class 10 · Science · Medium
→Which substance contains water of crystallisation?
Class 10 · Science · Medium
→Which reaction shows the reaction between an acidic oxide and a base?
Class 10 · Science · Medium
→Which pair has the first substance as an acidic oxide and the second as a basic oxide?
Class 10 · Science · Medium
→Which salt will show acidic nature in aqueous solution?
Class 10 · Science · Medium
→A substance turns red litmus blue but is only slightly soluble in water. What is the more correct term for it?
Class 10 · Science · Easy
→The temperature rises during the reaction between hydrochloric acid and sodium hydroxide. What does this show?
Class 10 · Science · Easy
→For which use is chlorine gas most suitably used?
Class 10 · Science · Medium
→Which gas is evolved at the cathode in the chlor-alkali process?
Class 10 · Science · Medium
→In the chlor-alkali process, which correct pair of products is obtained from aqueous sodium chloride solution?
Class 10 · Science · Medium
→Why is a mild edible acid mixed with baking soda in baking powder?
Class 10 · Science · Easy
→Why is sodium hydrogen carbonate used to make food items rise during cooking?
Class 10 · Science · Easy
→Why is plaster of Paris stored in a closed container away from moisture?
Class 10 · Science · Medium
→On heating blue vitriol, its blue colour turns white. On adding a few drops of water, the blue colour returns. What is the main reason?
Class 10 · Science · Medium
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