Which one of the following types of medicines
[question] Question. Which one of the following types of medicines is used for treating indigestion ? (1) Antibiotic (2) Analgesic (3) Antacid (4) Antiseptic [/question] [solution] solution: (3) Antacid [/solution]...
A solution reacts with crushed egg-shells to give a gas that turns lime-water milky.
[question] Question. A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains (1) NaCl (2) HCl (3) LiCl (4) KCl [/question] [solution] solution: (2) HCl [/solution]...
A solution turns red litmus blue,
[question] Question. A solution turns red litmus blue, its $\mathrm{pH}$ is likely to be (1) 1 (2) 4 (3) 5 (4) 10 [/question] [solution] solution: (4) 10...
Write an equation to show the reaction between
[question] Question. Write an equation to show the reaction between Plaster of Paris and water. [/question] [solution] solution: The chemical equation for the reaction of Plaster of Paris and water can be represented as [/solution]...
What will happen if a solution of sodium hydrogen carbonate is heated?
[question] Question. What will happen if a solution of sodium hydrogen carbonate is heated? Give the equation of the reaction involved. [/question] [solution] solution: When a solution of sodium hydrogencarbonate is heated, sodium carbonate and water are formed with the evolution of carbon dioxide gas. <img src="/media/uploads/2021/12/What-will-happen-if-a-solution-of-sodium-hydrogen-carbonate.png" alt="What will happen if a solution of sodium hydrogen carbonate " [/solution]...
Name the sodium compound
[question] Question. Name the sodium compound which is used for softening hard water. [/question] [solution] solution: Washing soda $\left(\mathrm{Na}_{2} \mathrm{CO}_{3} \cdot 10 \mathrm{H}_{2} \mathrm{O}\right)$ is used for softening hard water. [/solution]...
Name the substance which on treatment
[question] Question. Name the substance which on treatment with chlorine yields bleaching powder ? [/question] [solution] solution: Calcium hydroxide $\left[\mathrm{Ca}(\mathrm{OH})_{2}\right]$, on treatment with chlorine, yields bleaching powder. [/solution]...
What is the common name of the compound
[question] Question. What is the common name of the compound $\mathrm{CaOCl}_{2}$ ? [/question] [solution] solution: The common name of the compound $\mathrm{CaOCl}_{2}$ is bleaching powder. [/solution]...
Under what soil condition do you think a farmer would
[question] Question. Under what soil condition do you think a farmer would treat the soil of his fields with quick lime (calcium oxide) or slaked lime (calcium hydroxide) or chalk (calcium carbonate) ? [/question] [solution] solution: If the soil is acidic and improper for cultivation, then to neutralise the acidity of the soil, the farmer would treat the soil with quick lime or slaked lime or chalk. [/solution]...
Do basic solutions also have $\mathrm{H}^{+}(\mathrm{aq})$ ions ?
[question] Question. Do basic solutions also have $\mathrm{H}^{+}(\mathrm{aq})$ ions ? If yes, then why are these basic ? [/question] [solution] solution: Yes, a basic solution also has $\mathrm{H}^{+}(\mathrm{aq})$ ions. However, their concentration is less as compared to the concentration of $\mathrm{OH}^{-}(\mathrm{aq})$ ions which makes the solution basic. [/solution]...
What effect does the concentration
[question] Question. What effect does the concentration of $\mathrm{H}^{+}$(aq) ions have on the nature of the solution ? [/question] [solution] solution: If the concentration of $\mathrm{H}^{+}$ions is increased, the solution becomes more acidic. If the concentration of $\mathrm{H}^{+}$ions is decreased, the solution becomes less acidic or more basic. [/solution]...
How is the concentration of hydroxide ions
[question] Question. How is the concentration of hydroxide ions $\left(\mathrm{OH}^{-}\right)$affected when excess base is dissolved in a solution of sodium hydroxide ? [/question] [solution] solution: The concentration of hydroxide ions $\left(\mathrm{OH}^{-}\right)$would increase when excess base is dissolved in a solution of sodium hydroxide. [/solution]...
How is the concentration of hydronium ions
[question] Question. How is the concentration of hydronium ions $\left(\mathrm{H}_{3} \mathrm{O}^{+}\right)$affected when a solution of an acid is diluted [/question] [solution] solution: When an acid is diluted, the concentration of hydronium ions $\left(\mathrm{H}_{3} \mathrm{O}^{+}\right)$per unit volume decreases. This means that the strength of the acid decreases. [/solution]...
While diluting an acid,
[question] Question. While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid ? [/question] [solution] solution: It is recommended that the acid should be added to water and not water to the acid because the process of dissolving an acid in water is exothermic.If water is added to acid, since large amount of acid is present, a large amount of heat is generated, therefore, themixture splashes out and causes burns. [/solution]...