Test-MCQ Class 10-NCERT -Science-Chapter 2-Test-3 Chapter 2: Acids Base and salt Multiple Choice Questions No of Questions : 18 Marks: 20 Please enter your email: 1. Which of the following is(are) true when HCl (g) is passed through water? (i) It does not ionise in the solution as it is a covalent compound. (ii) It ionises in the solution (iii) It gives both hydrogen and hydroxyl ion in the solution (iv) It forms hydronium ion in the solution due to the combination of hydrogen ion with water molecule (ii) and (iv) (iii) and (iv) (i) only (iii) only 2. Which of the following statements is true for acids? Bitter and change blue litmus to red Sour and change red litmus to blue Bitter and change red litmus to blue Sour and change blue litmus to red 3. Which of the following are present in a dilute aqueous solution of hydrochloric acid? H3O+ + OH– Cl– + OH– unionised HCl H3O+ + Cl– 4. Identify the correct representation of reaction occurring during chloralkali process 2NaCl(aq) + 2H2O(l) → 2NaOH(aq) + Cl2(aq) + H2(aq) 2NaCl (aq) + 2H2O (l) → 2NaOH (aq) + Cl2(g) + H2(g) 2NaCl(aq) + 2H2O(aq) → 2NaOH(aq) + Cl2(g) + H2(g) 2NaCl(l) + 2H2O(l) → 2NaOH(l) + Cl2(g) + H2(g) 5. A solution turns red litmus blue, its pH is likely to be 10 1 4 5 6. A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains HCl KCl NaCl LiCl 7. 10 mL of a solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralise it will be 12 ml 8 ml 16 ml 4ml 8. Which one of the following types of medicines is used for treating indigestion? Antacid Antibiotic Analgesic Antiseptic 9. When a bee stings, immediately a paste of lime is put on the sting. Why? Bee sting contains an acid called formic acid. It gets neutralised with CaO . Bee sting is acidic due to hydrochloric acid and this is neutralised Bee sting is made of a base All of the given 10. Acid present in bee sting? hydrochloric acid methanoic acid acetic acid sulphuric acid 11. A calcium compound reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Identify the compound and the gas evolved. Calcium chloride, carbondioxide Calcium Carbonate, Carbon dioxide Calcium carbonate, hydrogen Calcium oxide, hydrogen 12. The milkiness (on passing excess carbondioxide gas through lime water) disappears due to the formation of: Calcium oxide CaO Calcium hydrogen carbonate CaHCO3 Calcium carbonate CaCO3 Calcium Nitrate Ca(NO3)2 13. Which statement is incorrect? acids giveH+ions in water acid conduct electricity in aqueous solution acids tum blue litmus red. Acids have pH more than 7 14. Lime water turns milky when carbon dioxide is passed due to the formation of ______. CO2 CaCO3 CaO CaSO4 15. Acids react with bases to form salt and water. This reaction is known as: Neutralisation Combination reduction Decomposition 16. Who proposed ionic theory of acid and bases. lewis bronsted lowry Amhenius 17. Which gas is released when a metal reacts whit an acid? O2 H2 SO2 Cl2 18. Acids react with metal carbonates to liberate ______ gas Hydrogen Carbon dioxide Water Carbon monoxide Loading … Question 1 of 18
