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Class 10 · Science · Hard
→Which salt solution is more likely to show acidic nature in water?
Class 10 · Science · Medium
→Which experiment proves that hydrogen chloride shows acidic properties after dissolving in water?
Class 10 · Science · Medium
→Which statement shows that all bases are not soluble in water?
Class 10 · Science · Easy
→Why does effervescence occur when sodium hydrogen carbonate is mixed with an acid?
Class 10 · Science · Medium
→A student passed the gas evolved from zinc and dilute acid into lime water. No milkiness appeared. What is the correct conclusion?
Class 10 · Science · Hard
→An acid reacts with a metal carbonate to give a gas. Why can the milkiness disappear when that gas is passed through lime water for a long time?
Class 10 · Science · Medium
→Why may an acid show little effect on an indicator if water is absent?
Class 10 · Science · Medium
→Which solution is most likely to have the highest concentration of hydrogen ions?
Class 10 · Science · Medium
→Why are acidic solutions able to conduct electric current?
Class 10 · Science · Medium
→Methyl orange turns red in an acidic solution. If enough base is added to the same solution, in which direction will the color change?
Class 10 · Science · Medium
→Which observation gives the strongest evidence that ions are present in a solution?
Class 10 · Science · Medium
→In a reaction, mixing an acid and a base increases the solution temperature. How should this be understood?
Class 10 · Science · Medium
→A student says all salts are neutral. Which example disproves this statement?
Class 10 · Science · Easy
→Which substance is used for bleaching clothes and wood pulp?
Class 10 · Science · Easy
→Which substance is used to disinfect water because it can provide chlorine?
Class 10 · Science · Easy
→Why does foam form when baking soda and vinegar are mixed?
Class 10 · Science · Easy
→Washing soda softens hard water. Removal of which ions gives this effect?
Class 10 · Science · Easy
→If a solution turns red indicator paper blue and phenolphthalein pink, which pH is most likely?
Class 10 · Science · Medium
→Phenolphthalein is added to a colourless solution and it turns pink. On adding acid, the colour disappears. What does this show?
Class 10 · Science · Easy
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