Acids, Bases and Salts
Class 10 · Science · 34 Questions
You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?
Why should curd and sour substances not be kept in brass and copper vessels?
Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas?
Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride.
Why do HCl, HNO₃, etc., show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character?
Why does an aqueous solution of an acid conduct electricity?
Why does dry HCl gas not change the colour of the dry litmus paper?
While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid?
How is the concentration of hydronium ions (H₃O⁺) affected when a solution of an acid is diluted?
How is the concentration of hydroxide ions (OH⁻) affected when excess base is dissolved in a solution of sodium hydroxide?
You have two solutions, A and B. The pH of solution A is 6 and pH of solution B is 8. Which solution has more hydrogen ion concentration? Which of this is acidic and which one is basic?
What effect does the concentration of H⁺(aq) ions have on the nature of the solution?
Do basic solutions also have H⁺(aq) ions? If yes, then why are these basic?
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)?
What is the common name of the compound Ca(ClO)₂?
Name the substance which on treatment with chlorine yields bleaching powder.
Name the sodium compound which is used for softening hard water.
What will happen if a solution of sodium hydrogencarbonate is heated? Give the equation of the reaction involved.
Write an equation to show the reaction between Plaster of Paris and water.
A solution turns red litmus blue, its pH is likely to be