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Class 10 · Science · Medium
→A student added acid to sodium carbonate. A gas was released and lime water turned milky. Which gas was it?
Class 10 · Science · Medium
→When zinc is added to an unknown solution, a gas is released and it gives a pop sound near a burning splint. What could be the nature of the solution?
Class 10 · Science · Easy
→When universal indicator is added to a solution, the colour appears green. What is the nature of the solution?
Class 10 · Science · Medium
→One solution has pH 2 and another has pH 5. Both are acidic. Which one is more likely to be more corrosive?
Class 10 · Science · Easy
→What happens to the number of hydroxide ions per unit volume when water is added to a basic solution?
Class 10 · Science · Easy
→What happens to the number of hydrogen ions per unit volume when water is added to an acidic solution?
Class 10 · Science · Medium
→What is the correct reason for adding concentrated sulphuric acid slowly to water during dilution?
Class 10 · Science · Easy
→Why is it wrong to identify acidic and basic substances by directly tasting them?
Class 10 · Science · Medium
→If a solution does not change the colour of either red or blue litmus paper, what is the most likely conclusion?
Class 10 · Science · Medium
→Which salt is formed in the reaction between sodium hydrogen carbonate and hydrochloric acid?
Class 10 · Science · Medium
→What products are formed when an acid reacts with a metal hydrogen carbonate?
Class 10 · Science · Medium
→If suitable amounts of hydrochloric acid and sodium hydroxide are mixed, what will mainly be present in the final solution?
Class 10 · Science · Medium
→In which condition can a neutralisation reaction result in a nearly neutral solution?
Class 10 · Science · Easy
→Which statement about indicators is the most correct?
Class 10 · Science · Medium
→The smell of vanilla decreases in a base when used as an olfactory indicator. This observation is useful for identifying what?
Class 10 · Science · Easy
→Which substance is likely to feel soapy and be basic in nature?
Class 10 · Science · Easy
→Which substance is likely to taste sour and be acidic in nature?
Class 10 · Science · Medium
→Why can adding organic matter gradually improve basic soil?
Class 10 · Science · Easy
→Adding lime to acidic soil is based on which principle?
Class 10 · Science · Medium
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