This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Salts > Class 7 Science Chapter 4 Salts – Quiz 10 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 10 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following pairs of solutions will produce a white precipitate? A) Lead (II) nitrate and sodium chloride. B) Magnesium nitrate and sodium sulphate. C) Calcium nitrate and sodium chloride. D) Barium sulphate and sodium chloride. Show Answer Correct Answer: A) Lead (II) nitrate and sodium chloride. 2. Phenolphthalein remains ..... when a solution is acidic. A) Colourless. B) Pink. C) Blue. D) Yellow. Show Answer Correct Answer: A) Colourless. 3. The correct mathematical expression for finding the molar solubility (s) of Sn(OH)$_{2}$ is: A) 4s$^{3}$ = Ksp. B) 2s$^{3}$ = Ksp. C) 8s $^{3} $ = ksp. D) 2s$^{2}$ = Ksp. Show Answer Correct Answer: A) 4s$^{3}$ = Ksp. 4. Which of these products makes a cake spongy? A) Carbon dioxide. B) Acid. C) Sodium Salt. D) Water. Show Answer Correct Answer: A) Carbon dioxide. 5. Among the following, which is NOT a form of calcium carbonate A) Egg shell. B) Chalk. C) Quick lime. D) Limestone. Show Answer Correct Answer: C) Quick lime. 6. Colours of phenolphthalein indicator in acidic and basic medium, respectively are: A) Pink and colourless. B) Colourless and pink. C) Blue and red. D) Red and blue. Show Answer Correct Answer: B) Colourless and pink. 7. What is the name of the process in which the reaction between acid and base takes place to give salt and water? A) Neutralization. B) Condensation. C) Distillation. D) None of the above. Show Answer Correct Answer: A) Neutralization. 8. What type of reaction produced an insoluble salt? A) Insoluble reaction. B) Titration reaction. C) Neutralisation reaction. D) Precipitation reaction. Show Answer Correct Answer: D) Precipitation reaction. 9. Which of the following salts dissolves only when hot? A) PbCl$_{2}$. B) KCl. C) NaCl. D) Case $ _ {4} $. Show Answer Correct Answer: A) PbCl$_{2}$. 10. Alkalis react with acids and neutralize them. Which of the following is the correct word equation representing neutralization reaction? A) Ammonia + hydrochloric acid = ammonium chloride. B) Copper carbonate + nitric acid = copper nitrate + water + carbon dioxide. C) Sodium hydroxide + hydrochloric acid = sodium chloride + water. D) Sodium oxide + water = sodium hydroxide. Show Answer Correct Answer: C) Sodium hydroxide + hydrochloric acid = sodium chloride + water. 11. Soap can be prepared by boiling ..... oil and ..... fat A) Vegetable, animal. B) Olive, bird. C) All the above. D) None of the above. Show Answer Correct Answer: A) Vegetable, animal. 12. Which is not a natural indicator A) China rose. B) Phenoptyalin. C) Litmus. D) Turmeric. Show Answer Correct Answer: B) Phenoptyalin. 13. A compound if acidic will turn all indicators red. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 14. Define the term insoluble. A) Can dissolve in water. B) Cannot dissolve in water. C) Partially dissolves in water. D) None of the above. Show Answer Correct Answer: B) Cannot dissolve in water. 15. When an ant bites, it injects A) Acidic liquid. B) Basic liquid. C) Both (a) and (b). D) Neutral liquids. Show Answer Correct Answer: A) Acidic liquid. 16. Find the acid in the following- A) Mg(OH)2. B) CA (OH) 2. C) NaOh. D) H3PO4. Show Answer Correct Answer: D) H3PO4. 17. Which of the following salts is commonly used in cooking? A) Calcium carbonate. B) Potassium nitrate. C) Magnesium sulfate. D) Sodium chloride. Show Answer Correct Answer: D) Sodium chloride. 18. Zinc + nitric acid $\rightarrow$? A) Zinc nitrate + hydrogen. B) Zinc chloride + water. C) Zinc sulfate + hydrogen. D) Zinc sulfate + water. Show Answer Correct Answer: A) Zinc nitrate + hydrogen. 19. Which of the following reactants are suitable to prepare iron(II) sulfate? A) FeCl$_{2}$ + H$_{2}$SO$_{4}$. B) Fe + H$_{2}$SO$_{4}$. C) $ _ {4} $ + H $ _ {2} $ So $ _ {4} $. D) Fe(NO$_{3}$)$_{2}$ + H$_{2}$SO$_{4}$. Show Answer Correct Answer: B) Fe + H$_{2}$SO$_{4}$. 20. ..... + nitric acid $\rightarrow$ calcium nitrate + water A) Calcium sulfate. B) Calcium oxide. C) Calcium carbonate. D) Calcium. Show Answer Correct Answer: B) Calcium oxide. 21. Which type of ion does an acid produce when it is dissolved in water? A) Hydronium. B) Hydroxide. C) Oxide. D) Oxygen. Show Answer Correct Answer: A) Hydronium. 22. Which of these are Natural Indicators? A) Turmeric. B) Red Cabbage. C) Hibiscus. D) All of these. Show Answer Correct Answer: D) All of these. 23. Chemical formula:Ammonia gas A) NH3. B) Th4. C) SO4. D) Ac. Show Answer Correct Answer: A) NH3. 24. If an indicator gives changes colour with a acid it does not change colour with an acid. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 25. The formula for a sulphate ion is SO$_{4}$ $^{2-}$ and for a nitrate is NO$_{3}$ $^{-}$. If the formula of the sulphate salt of M is MSO$_{4}$, what is the formula of the nitrate salt A) M(NO$_{3}$)$_{2}$. B) Diversified. C) M(NO$_{3}$)$_{3}$. D) M$_{2}$NO$_{3}$. Show Answer Correct Answer: A) M(NO$_{3}$)$_{2}$. 26. Organic acid are also known as A) Weak acid. B) Man-made acid. C) All the above. D) None of the above. Show Answer Correct Answer: A) Weak acid. 27. Acids have ..... ions. A) OH+. B) H+. C) H-. D) OH-. Show Answer Correct Answer: B) H+. 28. State whether the following compound is soluble or insoluble. Potassium hydroxide KOH A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble. 29. Is coffee an acid, base or neutral A) Acid. B) Base. C) Neutral. D) None of the above. Show Answer Correct Answer: A) Acid. 30. Common name of KOH A) Caustic soda. B) Caustic potash. C) Slaked lime. D) Quick lime. Show Answer Correct Answer: B) Caustic potash. 31. How do you convert the acidic soil? A) Organic waste. B) Antacids. C) Organic matter. D) Waste food materials. Show Answer Correct Answer: C) Organic matter. 32. ..... is used in manufacture of glass A) Calcium Hydroxide. B) Milk of Magnesia. C) Sodium carbonate. D) None of the above. Show Answer Correct Answer: C) Sodium carbonate. 33. The raw materials required for the manufacture of NaHCO3 by Solvay process are- A) NaCl, NH3CaCO3, H2O. B) CaCI2, (NH4)2 CO3, NH3. C) CaCI2, (NH4)2 CO3, NH3. D) NaCI2, (NH4)2CO3, NH3. Show Answer Correct Answer: A) NaCl, NH3CaCO3, H2O. 34. All bases are alkalis A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 35. Sodium carbonate solution is added into copper (II) nitrate solution in an experiment. What is the colour of the precipitate obtained? A) Yellow. B) Brown. C) Green. D) White. Show Answer Correct Answer: C) Green. 36. Complete the following word equation:Metalcarbonate + acid $\rightarrow$ A) Salt + Hydrogen. B) Salt + Water + Carbon Dioxide. C) Salt + Water. D) None of the above. Show Answer Correct Answer: B) Salt + Water + Carbon Dioxide. 37. Chlorides, sulfur, bromides, firs and fluoride are salts ..... A) Anaerobic principles. B) Anaerobic acids. C) Oxygen rules. D) Oxygenic acids. Show Answer Correct Answer: B) Anaerobic acids. 38. The word acid comes from the ..... word ..... which means ..... A) Greek word acid which means salty. B) French word acer which means sweet. C) Persian word acide which means bitter. D) Latin word acere which means sour. Show Answer Correct Answer: D) Latin word acere which means sour. 39. What is the oxidation number of a Nitrogen in the compound NaNO3? A) +4. B) -3. C) +5. D) None of the above. Show Answer Correct Answer: C) +5. 40. An antacid tablet is given to a person when he suffers from:- A) Obesity. B) Acidity. C) Dog bite. D) None of these. Show Answer Correct Answer: B) Acidity. 41. Which among of these is a natural indicator A) Mango leaf. B) China rose. C) Mint. D) All of them. Show Answer Correct Answer: B) China rose. 42. Copper (II) sulphate / Kuprum (II) sulfat A) Copper + sulphuric acidKuprum + asid sulfurik. B) Copper (II) oxide + sulphuric acidKuprum (II) oksida + asid sulfurik. C) Copper (II) nitrate + sulphuric acidKuprum (II) nitrat + asid sulfurik. D) None of the above. Show Answer Correct Answer: B) Copper (II) oxide + sulphuric acidKuprum (II) oksida + asid sulfurik. 43. You can neutralize acid by adding a base that is just as strong? A) Ture. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) Ture. 44. What is to be given to get rid of Bee sting? A) Baking soda. B) Sodium hydrogen carbonated. C) Zinc oxide. D) Both a and b. Show Answer Correct Answer: B) Sodium hydrogen carbonated. 45. What do we do when an ant bites us? A) Apply neutral solution. B) Apply formic acid. C) Apply citric acid. D) Apply moist baking soda. Show Answer Correct Answer: D) Apply moist baking soda. 46. Caustic Potash:Potassium Hydroxide::Caustic Soda: ..... A) Sodium Chloride. B) Sodium Hydroxide. C) Sodium. D) None. Show Answer Correct Answer: B) Sodium Hydroxide. 47. CH3COO-+ H2O ==> CH3COOH + OH-2. PO43-+ 3H2O ==> H3PO4 + 3OH-3. NH4+ + H2O ==> NH4OH + H+ 4. CN-+ H2O ==>HCN + OH-5. Al3+ + 3H2O ==> Al(OH)3 + 3H+ Pasangan persamaan reaksi hidrolisis yang bersifat basa adalah ..... A) 1 and 2. B) 2 and 3. C) 2 and 5. D) 3 and 5. E) 4 and 5. Show Answer Correct Answer: A) 1 and 2. 48. Zinc nitrate can be prepared by reacting nitric acid with excess solid. Which of the following solids cannot be used in the preparation of calcium nitrate? A) Zinc sulphate. B) Zinc carbonate. C) Zinc. D) Zinc oxide. Show Answer Correct Answer: A) Zinc sulphate. 49. Which of the following salts is generally considered insoluble in water? A) Ammonium acetate (CH3COONH4). B) Sodium chloride (NaCl). C) Potassium nitrate (KNO3). D) Calcium sulfate (CaSO4). Show Answer Correct Answer: D) Calcium sulfate (CaSO4). 50. COMMON INDICATOR USED IN LABORATORY IS A) METHYL ORANGE. B) PHENOPHTHALIN. C) LITMUS. D) TURMERIC. Show Answer Correct Answer: C) LITMUS. 51. NaOH is obtained by electrolysis of A) Paint nacl. B) Tongue.NHO$_{3}$. C) AqOn $ _ {2} $ co $ _ {3} $. D) Aq. solution of NaCl. Show Answer Correct Answer: D) Aq. solution of NaCl. 52. From the following compounds that can experience partial hydrolysis is ..... A) NaCl. B) K$_{2}$SO$_{4}$. C) AlF$_{3}$. D) CaF$_{2}$. E) CH $ _ {3} $ cook $ _ {4} $. Show Answer Correct Answer: D) CaF$_{2}$. 53. Tooth decay is cause by the presence of a base. (True or False) A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 54. ..... turns red when alkali is added to it. A) Litmus. B) Phenolphthalein. C) Methyl orange. D) China rose. Show Answer Correct Answer: C) Methyl orange. 55. Salts have metallic and nonmetallic elements. Which of these elements has positive charges? A) Metallic. B) Nonmetallic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Metallic. 56. Identify the acid present in a popular Indian dish, tamarind rice. A) Tannic acid. B) Tartaric acid. C) Citric acid. D) Lactic acid. Show Answer Correct Answer: B) Tartaric acid. 57. Why is burning a salt one way to determine the metal used in preparing it? A) Each metal burns a different color. B) Some metals burn and some don't. C) Each metal has a different colored smoke. D) Burning salts is not will not help determine the metal. Show Answer Correct Answer: A) Each metal burns a different color. 58. Ouick lime is added to ..... soil while, organic matter is added to ..... soil. A) Acidic, basic. B) Basic, acidic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Acidic, basic. 59. The medicines used to reduce acidity are known as ..... ? A) Antacids. B) Alkalies. C) Salts. D) Acids. Show Answer Correct Answer: A) Antacids. 60. The following equation represents a reaction between a metal and an acid.Zn+HCl $\rightarrow$ salt + H$_{2}$Which of the following options shows the name of the salt and its solubility? A) Zinc oxide, insoluble. B) Hydrochloric acid, soluble. C) Zinc, insoluble. D) Zinc chloride, soluble. Show Answer Correct Answer: D) Zinc chloride, soluble. ← 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 5Class 7 Science Chapter 4 Salts Quiz 6Class 7 Science Chapter 4 Salts Quiz 7Class 7 Science Chapter 4 Salts Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books