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Class 10 · Science
→When an acidic solution is neutralised by a base, what determines the nature of the salt formed?
Class 10 · Science
→Which substance is important in both disinfecting and bleaching uses?
Class 10 · Science
→A solution is diluted slowly, but its pH does not move far from 7 because it was already neutral. Which solution could it be?
Class 10 · Science
→Methyl orange is red and phenolphthalein is colourless in a solution. What is the nature of the solution?
Class 10 · Science
→Which statement about chemical products related to common salt is correct?
Class 10 · Science
→What is a water-soluble base called?
Class 10 · Science
→Lime is added to improve acidic soil. What problem can occur if too much lime is added?
Class 10 · Science
→If the hydrogen ion concentration in a solution increases ten times, what happens to the pH?
Class 10 · Science
→Sour food should not be stored in copper vessels. What is the scientific reason?
Class 10 · Science
→Why did the risk increase when a student added water to acid for dilution?
Class 10 · Science
→In an experiment both hydrogen gas and carbon dioxide gas may form. What are the correct tests to identify them?
Class 10 · Science
→Considering carbon dioxide as a non-metal oxide, why does it react with lime water?
Class 10 · Science
→A metal oxide is added to an acid and salt and water are formed. What type of reaction is this?
Class 10 · Science
→An unknown solid reacts with acid to give a gas that turns limewater milky. Which ion may be present in the solid?
Class 10 · Science
→If a solution has pH 3 and it is made one hundred times less acidic, what will be the approximate new pH?
Class 10 · Science
→What is the basic reason for water formation in an acid-base reaction?
Class 10 · Science
→Which substance is useful in softening hard water?
Class 10 · Science
→A solution turns blue litmus red but keeps phenolphthalein colourless. Which conclusion is correct?
Class 10 · Science
→Turmeric turns reddish-brown in a solution. What property does this solution have?
Class 10 · Science
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