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Class 10 · Science
→Which test is correct to confirm the gas released in the reaction of an acid with an active metal?
Class 10 · Science
→An aqueous solution feels soapy and shows pH 12. Why can touching it directly be dangerous?
Class 10 · Science
→Which pair is correct?
Class 10 · Science
→An acidic gas does not turn dry blue litmus red but turns moist blue litmus red. What does this prove?
Class 10 · Science
→A soil has pH 8.8. Which idea is correct to balance it for crops?
Class 10 · Science
→A solution that turns blue litmus red gives no gas with copper but gives gas with magnesium. What is the correct reason?
Class 10 · Science
→Why should bleaching powder be stored in a dry closed container?
Class 10 · Science
→When the pH of an acidic solution changes from 2 to 5, what happens to hydrogen ion concentration?
Class 10 · Science
→Which base is obtained during electrolysis of aqueous common salt solution?
Class 10 · Science
→Equal volumes of acid and base are mixed, but the solution remains basic. What is the most likely reason?
Class 10 · Science
→Methyl orange is yellow and turmeric is reddish-brown in a solution. What is the correct conclusion about this solution?
Class 10 · Science
→Copper oxide forms salt and water when added to dilute acid. What is the nature of copper oxide?
Class 10 · Science
→If copper metal does not give hydrogen gas with dilute acid, what is the most correct reason?
Class 10 · Science
→A basic solution changes from pH 14 to pH 11. Approximately how did its basicity change?
Class 10 · Science
→If hydroxide ions are slowly added to an acidic solution, why will its pH increase?
Class 10 · Science
→On heating baking soda, the remaining solid solution turns red litmus blue. What is the identity of the remaining solid?
Class 10 · Science
→The effect of acid rain on marble buildings is more evident because marble contains which substance?
Class 10 · Science
→Why does sodium chloride solution conduct electricity even though it is neutral?
Class 10 · Science
→To protect tooth enamel from dissolving, it is better to keep mouth pH above which limit?
Class 10 · Science
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