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 (iii) and (iv) (i) only (ii) and (iv) (iii) only 2. Which of the following statements is true for acids? Sour and change red litmus to blue Bitter and change red litmus to blue Bitter and change blue litmus to red Sour and change blue litmus to red 3. Which of the following are present in a dilute aqueous solution of hydrochloric acid? H3O+ + OH– H3O+ + Cl– unionised HCl Cl– + OH– 4. Identify the correct representation of reaction occurring during chloralkali process 2NaCl(aq) + 2H2O(aq) → 2NaOH(aq) + Cl2(g) + H2(g) 2NaCl(l) + 2H2O(l) → 2NaOH(l) + Cl2(g) + H2(g) 2NaCl (aq) + 2H2O (l) → 2NaOH (aq) + Cl2(g) + H2(g) 2NaCl(aq) + 2H2O(l) → 2NaOH(aq) + Cl2(aq) + H2(aq) 5. A solution turns red litmus blue, its pH is likely to be 5 4 10 1 6. A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains LiCl NaCl HCl KCl 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 8 ml 12 ml 16 ml 4ml 8. Which one of the following types of medicines is used for treating indigestion? Antiseptic Analgesic Antacid Antibiotic 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 . All of the given Bee sting is acidic due to hydrochloric acid and this is neutralised Bee sting is made of a base 10. Acid present in bee sting? acetic acid methanoic acid sulphuric acid hydrochloric 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 oxide, hydrogen Calcium Carbonate, Carbon dioxide Calcium chloride, carbondioxide Calcium carbonate, 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 Nitrate Ca(NO3)2 Calcium carbonate CaCO3 13. Which statement is incorrect? acids tum blue litmus red. acid conduct electricity in aqueous solution Acids have pH more than 7 acids giveH+ions in water 14. Lime water turns milky when carbon dioxide is passed due to the formation of ______. CaO CaCO3 CO2 CaSO4 15. Acids react with bases to form salt and water. This reaction is known as: Decomposition reduction Combination Neutralisation 16. Who proposed ionic theory of acid and bases. lewis lowry Amhenius bronsted 17. Which gas is released when a metal reacts whit an acid? H2 SO2 Cl2 O2 18. Acids react with metal carbonates to liberate ______ gas Carbon monoxide Water Hydrogen Carbon dioxide Loading … Question 1 of 18
