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Class 10 · Science · Medium
→Which substance is used for bleaching in the textile industry?
Class 10 · Science · Medium
→A solution has pH 7 but contains a dissolved salt. Which salt is most likely?
Class 10 · Science · Easy
→What is the colour of methyl orange in an acidic solution?
Class 10 · Science · Medium
→An acid reacts with zinc to give one gas and with sodium carbonate to give another gas. What are the correct identities of the two gases?
Class 10 · Science · Medium
→Which statement correctly describes the general nature of metal oxides and non-metal oxides?
Class 10 · Science · Medium
→If one solution has one hundred times more hydrogen ions than another solution, by how much will its pH be lower approximately?
Class 10 · Science · Easy
→Turmeric as a natural indicator is especially useful for identifying which type of solution?
Class 10 · Science · Medium
→If a salt solution turns red litmus blue, which could be a possible example?
Class 10 · Science · Medium
→An unknown gas turns lime water milky but does not give a pop sound near a burning splint. Which gas is it?
Class 10 · Science · Medium
→Why does the solution become warm when acid is added to water?
Class 10 · Science · Medium
→Blue litmus turns red in a solution. Then sodium hydroxide is added drop by drop. What happens near the neutralisation point?
Class 10 · Science · Easy
→An aqueous solution feels soapy and turns red litmus blue. In which range is its pH most likely to be?
Class 10 · Science · Easy
→Why do small pellets of sodium hydroxide become wet when left exposed?
Class 10 · Science · Medium
→A solution conducts electricity but does not contain solid sodium chloride. What is the best reason for conductivity of an acidic solution?
Class 10 · Science · Easy
→If a substance turns blue litmus red and forms salt and water with another substance, what is the nature of the second substance?
Class 10 · Science · Easy
→Why is a basic toothpaste useful for teeth?
Class 10 · Science · Easy
→Why can acid rain damage marble buildings?
Class 10 · Science · Medium
→A farmer's soil has pH 8.5. He wants to reduce its basicity. Which method would be more suitable?
Class 10 · Science · Medium
→In a solution phenolphthalein is colourless but methyl orange is yellow. What type of solution could it be?
Class 10 · Science · Easy
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