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Class 10 · Science · Medium
→The temperature rises during the reaction between an acid and a base. What does this indicate about the reaction?
Class 10 · Science · Easy
→Which pair will undergo a neutralisation reaction when mixed?
Class 10 · Science · Medium
→When pH changes from three to six, which conclusion is most correct?
Class 10 · Science · Easy
→What change in nature is shown when the pH of a solution changes from seven to eleven?
Class 10 · Science · Medium
→If soap does not lather in hard water but starts lathering after adding washing soda, what is the correct reason?
Class 10 · Science · Medium
→Which substance is used to soften hard water?
Class 10 · Science · Easy
→Bleaching powder is used for disinfecting water because of which property?
Class 10 · Science · Easy
→In making bleaching powder, slaked lime reacts with which gas?
Class 10 · Science · Easy
→Sodium hydroxide produced in the chlor-alkali process is useful in which industry?
Class 10 · Science · Medium
→At which electrode is chlorine gas formed in the chlor-alkali process?
Class 10 · Science · Medium
→In the chlor-alkali process, which product is formed at the cathode during electrolysis of brine?
Class 10 · Science · Medium
→The gas formed on strong heating of baking soda turns lime water milky. Which gas is it?
Class 10 · Science · Medium
→What is one important advantage of adding a mild acid in baking powder?
Class 10 · Science · Medium
→When a drop of water is added to white anhydrous copper sulphate, the blue colour returns. What is the main reason?
Class 10 · Science · Medium
→Blue crystals of copper sulphate become white on heating. What does this change prove?
Class 10 · Science · Medium
→Why is plaster of Paris formed when gypsum is heated in a controlled way?
Class 10 · Science · Medium
→What is the amount of water per unit of calcium sulphate in plaster of Paris?
Class 10 · Science · Easy
→How many molecules of water of crystallisation are present in washing soda?
Class 10 · Science · Medium
→Why is sodium chloride solution considered neutral?
Class 10 · Science · Hard
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