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Class 10 · Science · Medium
→A substance gives carbon dioxide with acid and its solution is basic. Which substance can it be?
Class 10 · Science · Medium
→Why does copper generally not give hydrogen gas with dilute acids?
Class 10 · Science · Medium
→A metal gives a gas with acid and the gas gives a pop sound near a burning splint. Which conclusion about the metal is correct?
Class 10 · Science · Medium
→Ammonia turns moist red litmus blue but not dry red litmus. What does this show?
Class 10 · Science · Medium
→Dry hydrogen chloride gas has no effect on dry litmus but turns blue litmus red after dissolving in water. What is the reason?
Class 10 · Science · Medium
→Why does hydrochloric acid show a stronger acidic effect than ethanoic acid at the same concentration?
Class 10 · Science · Medium
→Two acids of equal concentration are compared and the first shows higher electrical conductivity. Which conclusion is correct?
Class 10 · Science · Expert
→A salt solution shows pH 9. It is more likely formed from what?
Class 10 · Science · Hard
→A salt solution shows pH 3. From which type of acid and base can this salt be formed?
Class 10 · Science · Hard
→The pH of a solution changes from 4 to 2. What happened to the hydrogen-ion concentration?
Class 10 · Science · Hard
→An acidic solution is diluted ten times. If the initial pH was 3, what will be the approximate new pH?
Class 10 · Science · Medium
→An unknown white solid reacts with acid to give carbon dioxide, and its aqueous solution is basic. Which solid is most likely?
Class 10 · Science · Easy
→In which order does acidity decrease and basicity increase?
Class 10 · Science · Medium
→A solution has pH less than 7 and reacts with a metal carbonate to release a gas. By which test will this gas be identified?
Class 10 · Science · Easy
→Which statement correctly compares acids and bases?
Class 10 · Science · Medium
→A student dissolves a metal oxide in water and the resulting solution turns red litmus blue. What does this prove about the metal oxide?
Class 10 · Science · Easy
→Which aqueous solution will conduct electricity because ions are formed in it?
Class 10 · Science · Easy
→A solution conducts electricity well and turns blue litmus red. The presence of which ions does this indicate?
Class 10 · Science · Medium
→Why is an antacid given when excess acid is produced in the stomach?
Class 10 · Science · Medium
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