This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Salts > Class 7 Science Chapter 4 Salts – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 5 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Inorganic salt, white powdery compound used as a preservative A) Potassium chloride. B) Ammonium chloride. C) Sodium carbonate. D) Barium sulphate. Show Answer Correct Answer: C) Sodium carbonate. 2. Turmeric, litmus, china rose petals are A) Indicator. B) Conductor. C) Insulator. D) None of these. Show Answer Correct Answer: A) Indicator. 3. Sodium hydroxide + sulfuric acid $\rightarrow$ ..... ? A) Sodium carbonate. B) Sodium sulfate. C) All the above. D) None of the above. Show Answer Correct Answer: B) Sodium sulfate. 4. Which of the following insoluble salt? Antara next, which salt is not dissolved salt? A) Lead (II) nitaratePlumbum (II) nitrat. B) Magnesium nitrate Magnesium nitrat. C) Sodium chlorideNatrium klorida. D) Lead (I) Sultaplumbum (II) Sulfat. Show Answer Correct Answer: D) Lead (I) Sultaplumbum (II) Sulfat. 5. Solution P forms white precipitate with lead(II) nitate. Which of the following ions could be present in solution P?I ChlorideII SulphateIII CarbonateIV Iodide A) I and II. B) I and IV. C) I, II and III. D) I, II, III and IV. Show Answer Correct Answer: D) I, II, III and IV. 6. What happens during a neutralization reaction? A) Carbon dioxide and water are formed. B) Water and a salt are formed. C) Hydrogen and a base are formed. D) Oxygen and a metal are formed. Show Answer Correct Answer: B) Water and a salt are formed. 7. Which substances taste us sour? A) Neutralizers. B) Acids. C) Salts. D) Bases. Show Answer Correct Answer: B) Acids. 8. Coffee is brown and bitter in taste. Is it an acid or a base? A) Acid. B) Base. C) All the above. D) None of the above. Show Answer Correct Answer: B) Base. 9. ..... litmus paper turns ..... in acidic conditions. A) Pink to colourless. B) Red, blue. C) Red, colourless. D) Blue, red. Show Answer Correct Answer: D) Blue, red. 10. Lead(II) nitrate, Pb(NO$_{3}$)$_{2}$ A) Soluble Salt. B) Insoluble Salt. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble Salt. 11. What is meant by p and H in pH? A) Potency and hydrogen. B) Potassium and Helium. C) Phosphorous and Hydrogen. D) Potency and helium. Show Answer Correct Answer: A) Potency and hydrogen. 12. When an acid reacts with a metal carbonate and metal hydrogen carbonate, it gives the corresponding salt, water and releases which gas? A) N$_{2}$. B) O$_{2}$. C) CO$_{2}$. D) H$_{2}$. Show Answer Correct Answer: C) CO$_{2}$. 13. What is the oxidation number of a Sulfur in the compound Na2SO4? A) -2. B) +6. C) +2. D) None of the above. Show Answer Correct Answer: B) +6. 14. When litmus is added to a basic solution it turns into A) White. B) Red. C) Blue. D) Pink. Show Answer Correct Answer: C) Blue. 15. Methyl orange turns ..... in acid. A) Yellow. B) No colour change. C) Green. D) Red. Show Answer Correct Answer: D) Red. 16. When an ant bites it releases what A) Formic acid. B) A base. C) Magnesium hydroxide. D) None of these. Show Answer Correct Answer: A) Formic acid. 17. What is the chemical formula of siver nitrate A) Fly. B) Naked. C) All the above. D) None of the above. Show Answer Correct Answer: A) Fly. 18. Which of the following is a soluble sulphate salt? Which of the following is dissolved sulfate salt? A) Lead (ii) sulphate / plumbum (ii) sulfate. B) Barium sulphate / Barium sulfat. C) Zinc sulphate / Zink sulfat. D) Calcium sulphate / Kalsium sulfat. Show Answer Correct Answer: C) Zinc sulphate / Zink sulfat. 19. Where is ammonium hydroxide found in? A) Detergent. B) Baking soda. C) Window cleaner. D) Toilet cleaner. Show Answer Correct Answer: C) Window cleaner. 20. Assertion(A):Bases which are soluble in water are called alkalis.Reason(R):All bases are alkalis. A) Both A and R are false. B) Both A and R are true but R is not the correct explanation for A. C) Both A and R are true and R is the correct explanation for A. D) A is true but R is false. Show Answer Correct Answer: D) A is true but R is false. 21. True or false:All bases are alkali. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 22. Which of the following salts is a not a normal salt? A) K$_{2}$SO$_{4}$. B) NaCl. C) NaHCO $ _ {3} $. D) Ca (no $ _ {3} $) $ _ {2} $. Show Answer Correct Answer: C) NaHCO $ _ {3} $. 23. What is mineral acid? A) Produced from chemical substances. B) Occur naturally. C) Change color. D) Oxalic. Show Answer Correct Answer: A) Produced from chemical substances. 24. Acid + Carbonate yields ..... A) Salt + Hydrogen. B) Salt + Alkali. C) Salt + Water. D) Salt + Water + Carbon Dioxide. Show Answer Correct Answer: D) Salt + Water + Carbon Dioxide. 25. Acid turns blue litmus paper ..... and base turns red litmus paper ..... A) Red, blue. B) Blue, red. C) Blue, blue. D) Red, red. E) None of the above. Show Answer Correct Answer: A) Red, blue. 26. Curd, lemon juice, orange juice taste A) Bitter. B) Sour. C) Salty. D) Sweet. Show Answer Correct Answer: B) Sour. 27. Name the salt produced when reacting Magnesium and Hydrochloric acid? A) Magnesium nitrate. B) Magnesium chloride. C) Magnesium sulfate. D) Magnesium phosphate. Show Answer Correct Answer: B) Magnesium chloride. 28. Which method is used to prepare barium sulphate? A) Add excess solid reactant to acid. B) Titration. C) Precipitation. D) None of the above. Show Answer Correct Answer: C) Precipitation. 29. Calculate the [H$^{+}$] in a solution that has a pH of 2.73. A) 1.9 x 10$^{-3}$ M. B) 11.3 M. C) 2.7 M. D) 5.4 x 10$^{-12}$ M. Show Answer Correct Answer: A) 1.9 x 10$^{-3}$ M. 30. Salts have metallic and nonmetallic elements. Which of these elements has negative charges? A) Metallic. B) Nonmetallic. C) All the above. D) None of the above. Show Answer Correct Answer: B) Nonmetallic. 31. A solution reacts with crushed egg-shells to give that turns lime-water milky. The solution contains: A) HCl. B) NaCl. C) KCl. D) LiCl. Show Answer Correct Answer: A) HCl. 32. Carbon burns in air to form ..... It is ..... oxide. Its aqueous solution turns ..... litmus ..... A) Oxygen, basic, red, red. B) Carbon dioxide, acidic, blue, red. C) Helium, acidic, blue, blue. D) Nitrogen, basic, red, blue. Show Answer Correct Answer: B) Carbon dioxide, acidic, blue, red. 33. Which one of these is a common salts A) Basic lead chloride. B) Potassium hydroxide. C) Sodium hydrogen sulphate. D) Calcium bicarbonate. Show Answer Correct Answer: B) Potassium hydroxide. 34. Tartaric acid is found in: A) Curd. B) Vinegar. C) Amla. D) Tamarind. Show Answer Correct Answer: D) Tamarind. 35. What is the term for "A compound formed from the positive ions of an acid and the negative ions of a base" ? A) Catalyst. B) Antacid. C) Salt. D) Indicator. Show Answer Correct Answer: C) Salt. 36. The following reaction is a example of what?Hydrochloric acid [HCI] + Sodium hydroxide [NaOH] = Sodium chloride [NaCL] + Water A) Acid rain. B) Litmus extraction. C) Neutralization. D) Phenolphthalein. Show Answer Correct Answer: C) Neutralization. 37. What is the correctly written chemical formula for the ionic compound, potassium nitride? A) KNO$_{3}$. B) K$_{3}$N. C) KN. D) KN$_{3}$. Show Answer Correct Answer: B) K$_{3}$N. 38. Riddle Time:Coffee is brownAnd bitter in taste.Is it an Acid or Base? A) Acidic. B) Basic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Acidic. 39. What is the name of the practical technique to neutralise an alkali? A) Telestration. B) Neutralization. C) Titration. D) Using a burette. Show Answer Correct Answer: C) Titration. 40. Which base is present in soap A) Sodium hydroxide. B) Calcium hydroxide. C) Potassium hydroxide. D) Both option 1 and 3. Show Answer Correct Answer: D) Both option 1 and 3. 41. Is (nh $ _ {4} $) $ _ {2} $ co $ _ {3} $ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble. 42. Select all the basic salts from the following choices: A) On $ _ {2} $ co $ _ {3} $. B) K$_{2}$SO$_{4}$. C) NH4CL. D) KOH. E) NaCl. Show Answer Correct Answer: A) On $ _ {2} $ co $ _ {3} $. 43. The solubility of AgF will ..... if potassium fluoride is added to the solution. A) Decrease. B) Increase. C) Remain the same. D) None of the above. Show Answer Correct Answer: A) Decrease. 44. To prepare copper sulfate using sulfuric acid, the sample that should be used is? A) Copper carbonate. B) Copper metal. C) All the above. D) None of the above. Show Answer Correct Answer: A) Copper carbonate. 45. Basic solutions turn china rose petal solution ..... A) No effect. B) Dark pink. C) Red. D) Green. Show Answer Correct Answer: D) Green. 46. What is the pH of a 1 x 10$^{-3}$ M solution of HNO$_{3}$? A) 2. B) 0. C) 3. D) 1. Show Answer Correct Answer: C) 3. 47. Which salt would be formed by reacting cobalt carbonate and hydrochloric acid? A) Cobalt sulfate. B) Cobalt hydroxide. C) Cobalt sulfide. D) Cobalt chloride. Show Answer Correct Answer: D) Cobalt chloride. 48. What reactants are needed to prepare (make) copper carbonate? A) Copper and hydrochloric acid. B) Copper and sulfuric acid. C) Copper and nitric acid. D) Copper and carbonic acid. Show Answer Correct Answer: D) Copper and carbonic acid. 49. Methyl orange is a natural indicator. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 50. G of calcium carbonate reacts with 50 cm$^{3}$ of 1 mol dm$^{-3}$ hydrochloric acid, HCl. Determine the mass of calcium carbonate that has not taken part in the reaction.[Relative atomic mass:Ca = 40, C = 12, O = 16] A) 5.5 g. B) 2.5 g. C) 4.3 g. D) 3.8 g. Show Answer Correct Answer: C) 4.3 g. 51. What will happen when acid is poured into the blue litmus and red litmus paper A) Blue litmus becomes colourless in acid and red litmus turns into blue in base. B) Blue litmus turns red in acid and red litmus turns into black in base. C) Both a and b. D) Red litmus turns blue in base and blue litmus turns red in acid. Show Answer Correct Answer: D) Red litmus turns blue in base and blue litmus turns red in acid. 52. Stirring the solution ..... A) Decrease the rate of solubility. B) Doesn't change the rate of solubility. C) Increase the rate of solubility. D) None of the above. Show Answer Correct Answer: C) Increase the rate of solubility. 53. What are Acid salts? A) Salt formed from solution which has Strong Base but weak Acid. B) Salt formed from solution which has Strong Acid but weak Base. C) Salt formed from solution which has Strong acid and Base. D) Salt formed from solution which has weak acid and Base. Show Answer Correct Answer: B) Salt formed from solution which has Strong Acid but weak Base. 54. To which colour does phenolphthalein changes when we add it to an acod A) Yellow. B) Colourless. C) Red. D) Pink. Show Answer Correct Answer: B) Colourless. 55. Salts that are made with hydrochloric acid are called ..... A) Chlorides. B) Carbonates. C) Sulfates. D) Nitrates. Show Answer Correct Answer: A) Chlorides. 56. Which of the following statements is correct about an aqueous solution of an acid and of a base?(i) Higher the pH, stronger the acid(ii) Higher the pH, weaker the acid(in) Lower the pH, stronger the base(iv) Lower the pH, weaker the base A) (i) and (iii). B) (ii) and (iii). C) (i) and (iv). D) (ii) and (iv). Show Answer Correct Answer: D) (ii) and (iv). 57. Which Salt is form with the following acid-Sulfuric Acid A) Chloride. B) Sulfate. C) Nitrate. D) None of the above. Show Answer Correct Answer: B) Sulfate. 58. Strong acid + Weak base makes A) Acidic salt. B) Basic salt. C) Neutral salt. D) None of the above. Show Answer Correct Answer: A) Acidic salt. 59. True or False. Antacid is containing Mg(OH)2. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 60. An indicator 'X' on adding to a base turns yellow and when added to an acid it turns red identify the indicator 'X' A) Red cabbage. B) Litmus. C) Turmeric. D) Phenolphthalein. E) Methyl orange. Show Answer Correct Answer: E) Methyl orange. ← PreviousNext →Related QuizzesScience QuizzesClass 7 QuizzesClass 7 Science Chapter 4 Salts Quiz 1Class 7 Science Chapter 4 Salts Quiz 2Class 7 Science Chapter 4 Salts Quiz 3Class 7 Science Chapter 4 Salts Quiz 4Class 7 Science Chapter 4 Salts Quiz 6Class 7 Science Chapter 4 Salts Quiz 7Class 7 Science Chapter 4 Salts Quiz 8Class 7 Science Chapter 4 Salts Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books