This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Salts > Class 7 Science Chapter 4 Salts – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 4 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If the substrates of the reaction are bacl $ _ {2} $ I on $ _ {2} $ so $ _ {4} $, this product insoluble in water will be: A) Bromank sodu. B) Sulfate (VI) sodium. C) Sodium chloride. D) Sulphate (VI) bar. Show Answer Correct Answer: D) Sulphate (VI) bar. 2. The acid that our stomach releases is:- A) Nitric acid. B) Hydrochloric acid. C) Sulphuric acid. D) None of these. Show Answer Correct Answer: B) Hydrochloric acid. 3. Hydrochloric acid and sodium hydroxide react to form ..... & ..... A) Sodium chloride and water. B) Calcium hydroxide and carbon dioxide. C) Sodium chloride and carbon dioxide. D) Magnesium hydroxide and salt. Show Answer Correct Answer: A) Sodium chloride and water. 4. The solutions which do not change colour of either red or blue litmus are known as? A) Acidic solution. B) Neutral solution. C) Basic solution. D) None of the above. Show Answer Correct Answer: B) Neutral solution. 5. HCl + NaOH = ..... + ..... A) NaCl + H02. B) C12H22O11 + H20. C) NaCl + H20. D) Cut + this 0. Show Answer Correct Answer: C) NaCl + H20. 6. Sodium carbonate is also know as A) Washing soda. B) Epsom Salt. C) Table salt. D) None of the above. Show Answer Correct Answer: A) Washing soda. 7. Most microorganisms cannot live in A) Acidic environment. B) Basic Environment. C) All the above. D) None of the above. Show Answer Correct Answer: A) Acidic environment. 8. Any 1 example of tartaric acid. A) Grapes. B) Milk. C) Spinach. D) Mango. Show Answer Correct Answer: A) Grapes. 9. Potassium Hydroxide is present in? A) Rust. B) Soap. C) Banana. D) Window cleaner. Show Answer Correct Answer: B) Soap. 10. Which of the following substances can be used to prepare copper (II) chloride by reaction with hydrochloric acid?I Copper (II) oxideII Copper (II) nitrateIII Copper (II) carbonateIV Copper (II) hydroxide A) I, II and III. B) I, II and IV. C) I, III and IV. D) II, III and IV and IV. Show Answer Correct Answer: C) I, III and IV. 11. Another name of Magnesium Hydroxide? A) Milk of Magnesia. B) Indicator. C) Caustic soda. D) Slaked lime. Show Answer Correct Answer: A) Milk of Magnesia. 12. What is the symbol for carbonate? A) CO. B) CO2. C) Elbow. D) None of the above. Show Answer Correct Answer: C) Elbow. 13. A solution Y is colourless when phenolphthalein was added to it. It didn't change its colour even on turmeric paper. It didnot change the colour of blue litmus paper too. What is the nature of the substance Y? A) Neutral. B) Can't find with this data. C) Base. D) Acid. Show Answer Correct Answer: A) Neutral. 14. What are the products of the equation when you combine Platinum and Water? A) Platinum. B) Platinum + Water. C) No Reaction. D) None of the above. Show Answer Correct Answer: C) No Reaction. 15. Which of the following options best defines an acid? A) Bases are soapy to touch. B) Acids are soapy to touch. C) Acids are bitter in taste. D) Acids are sour in taste. Show Answer Correct Answer: D) Acids are sour in taste. 16. Soap contains ..... A) Magnesium Hydroxide. B) Potassium Hydroxide. C) Calcium Hydroxide. D) Ammonium Hydroxide. Show Answer Correct Answer: B) Potassium Hydroxide. 17. Tannic Acid is present in A) Tea. B) Vinegar. C) Tomato. D) Coffee. Show Answer Correct Answer: A) Tea. 18. An unknown salt, M$_{2}$Z, has a K$_{sp}$ of 3.3 x 10$^{-9}$. Calculate the solubility in mol/L of M$_{2}$Z. A) 5.7 x 10$^{-5}$ M. B) 2.9 x 10$^{-5}$ M. C) 3.7 x 10$^{-5}$ M. D) 9.4 x 10$^{-5}$ M. Show Answer Correct Answer: D) 9.4 x 10$^{-5}$ M. 19. Can salt be reversed back to form acid and base. A) YES. B) NO. C) All the above. D) None of the above. Show Answer Correct Answer: B) NO. 20. Hcl+ ..... $\rightarrow$Nacl+H20 A) NaOH. B) Fe. C) C02. D) Mg0. Show Answer Correct Answer: A) NaOH. 21. What is the symbol for Copper? A) Co. B) C. C) CU. D) Cu. Show Answer Correct Answer: D) Cu. 22. What colour does UI turn in a solution of pH 6? A) Dark green. B) Turquoise. C) Yellow. D) Red. Show Answer Correct Answer: C) Yellow. 23. Silver is more reactive than Copper. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 24. How can you convert zinc oxide to zinc carbonate? A) Add zinc oxide in dilute hydrochloric acid. Then add excess sodium carbonate to the resulting solution. B) Pass carbon dioxide gas over zinc oxide powder. C) Heat a mixture of carbon and zinc oxide powder. D) Add zinc oxide powder to sodium carbonate solution. Show Answer Correct Answer: A) Add zinc oxide in dilute hydrochloric acid. Then add excess sodium carbonate to the resulting solution. 25. Which of the following mixture will react to produce an aqueous zinc nitrate solution?I Zinc carbonate and dilute nitric acid.II Zinc oxide and dilute nitric acid.III Zinc oxide and potassium nitrate solution.IV Zinc and aqueous sodium nitrate solution. A) I and II. B) II and III. C) III and IV. D) I and IV. Show Answer Correct Answer: A) I and II. 26. Tamarind, curd and lemon taste sour because A) They contain acids. B) They do not contain acids. C) All the above. D) None of the above. Show Answer Correct Answer: A) They contain acids. 27. Materials used in the manufacture of bleaching powder are- A) Lime stone and chlorine. B) Quick lime and chlorine. C) Slaked lime and HCI. D) Slaked lime and chlorine. Show Answer Correct Answer: D) Slaked lime and chlorine. 28. General property of acid A) Taste sour. B) Bitter button. C) Not soluble in water. D) None of the above. Show Answer Correct Answer: A) Taste sour. 29. Magnesium reacts with dilute sulfuric acid to form? A) Magnesium nitrate. B) Magnesium oxide. C) Magnesium sulfate. D) Magnesium carbonate. Show Answer Correct Answer: C) Magnesium sulfate. 30. Acetic acid was added to a solid X kept in a test tube. A colorless and adourless gas was evolved. The gas was passed through lime water which turned milky. It was included that ..... A) Solid X is sodium hydroxide and the gas evolved is CO$_{2}$. B) Solid X is sodium bicarbonate and the gas evolved is CO$_{2}$. C) Solid X is Sodium acetate and the gas evolved is CO$_{2}$. D) Solid X is Sodium Chloride and the gas evolved is CO$_{2}$. Show Answer Correct Answer: B) Solid X is sodium bicarbonate and the gas evolved is CO$_{2}$. 31. The colour of phenolphthalein in acidic medium A) Red. B) Colourless. C) Pink. D) Orange. Show Answer Correct Answer: B) Colourless. 32. Which of the following is not a soluble base A) Copper oxide. B) Potassium oxide. C) Sodium oxide. D) Potassium hydroxide. Show Answer Correct Answer: A) Copper oxide. 33. In the preparation of magnesium chloride, an excess of magnesium metal is added to a fixed amount of hydrochloric acid. Why is excess magnesium added? A) To ensure that all the acid is used up. B) To ensure that magnesium is used up. C) To allow for the reaction to happen. D) None of the above. Show Answer Correct Answer: A) To ensure that all the acid is used up. 34. Acids dissolve in water 'Releases'? A) H+ ions. B) Oh-ions. C) H + H20$\rightarrow$ H3O. D) None of the above. Show Answer Correct Answer: A) H+ ions. 35. Which of the following salts does not exist? A) Ammonium carbonate. B) Barium carbonate. C) Zinc carbonate. D) Aluminium carbonate. Show Answer Correct Answer: D) Aluminium carbonate. 36. China rose indicator gives green colour for the following test solutions. A) Milk of magnesia. B) Baking soda. C) Lime water. D) All of the above. Show Answer Correct Answer: D) All of the above. 37. During a chemistry experiment, what color does Sodium Hydroxide turn phenolphthalein solution? A) Orange. B) Pink. C) Red. D) Colorless. Show Answer Correct Answer: B) Pink. 38. Calcium carbonate is a soluble salt. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 39. Which of the following method is suitable to prepare iron(II) sulfate? A) Alkali reacting with ammonium salt. B) Acid reacting with base. C) Titration. D) Precipitation. Show Answer Correct Answer: B) Acid reacting with base. 40. What is the definition of an ACID? A) A substance that contains hydroxide and ionizes to produce OH-. B) A substance that contains hydrogen and ionizes to produce H+. C) A substance that contains hydrogen and ionizes to produce OH-. D) A substance that contains hydroxide and ionizes to produce H+. Show Answer Correct Answer: B) A substance that contains hydrogen and ionizes to produce H+. 41. IS NH ..... { ..... 4}OHNH4OHIS A BASE. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 42. Which salt is insoluble in water? Which salt is not soluble in water? A) ZnSO$_{4}$. B) Lamb $ _ {3} $. C) Ba(NO$_{3}$)$_{2}$. D) Glass $ _ {4} $. Show Answer Correct Answer: D) Glass $ _ {4} $. 43. On adding phenolphthalein indicator to a colourless solution, no change is observed. What is the nature of this solution? A) Either basic or neutral. B) Basic. C) Either acidic or basic. D) Either acidic or neutral. Show Answer Correct Answer: D) Either acidic or neutral. 44. Which of these is a double salt A) Potassium hydroxide. B) Dolomite. C) Sodium hydroxide. D) Slaked lime. Show Answer Correct Answer: B) Dolomite. 45. Phenolphthalein ( C20 H14 O4 ) turns ..... in basic solution. A) Red. B) Blue. C) Pink. D) Green. Show Answer Correct Answer: C) Pink. 46. Is the distilled water acidic/basic/neutral? A) Acidic. B) Basic. C) Neutral. D) None of the above. Show Answer Correct Answer: C) Neutral. 47. Which salt can be prepared by adding a metal oxide in excess to an acid, filtration and finally crystallization? A) Barium sulfate. B) Silver chloride. C) Copper(II) sulfate. D) Copper(II) hydroxide. Show Answer Correct Answer: C) Copper(II) sulfate. 48. What is the ph scale in acid base and neutral solutions? A) 14, 7, 1. B) 7, 8, 10. C) 1, 7, 14. D) 5, 0. Show Answer Correct Answer: C) 1, 7, 14. 49. Which of these are correct?(a) Both acids and bases change colour of all indicators.(b) If an indicator gives a colour change with an acid, it does not give a change with a base.(c) If an indicator changes colour with a base, it does not change colour with an acid.(d) Change of colour in an acid and a base depends on the type of the indicator. A) All four. B) A and d. C) B, c, and d. D) Only d. Show Answer Correct Answer: B) A and d. 50. CuO + (X) $\rightarrow$ CuSO$_{4}$ + H$_{2}$O. Here (X) is- A) HCl. B) H$_{2}$SO$_{4}$. C) CuSO $ _ {4} $. D) HNO$_{3}$. Show Answer Correct Answer: B) H$_{2}$SO$_{4}$. 51. True or False. Nitric acid is organic acid. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 52. Which of the following can be used as an antacid? A) NaHCO $ _ {3} $. B) NaOH. C) On $ _ {2} $ co $ _ {3} $. D) NaCl. Show Answer Correct Answer: A) NaHCO $ _ {3} $. 53. When an acid reacts with a base, what are the products? A) Salt and water. B) Acid and base. C) Salt and acid. D) Base and water. Show Answer Correct Answer: A) Salt and water. 54. Acids are ..... in taste while bases are ..... A) Bitter, sour. B) Sour, sweet. C) Sour, bitter. D) Bitter, sweet. Show Answer Correct Answer: C) Sour, bitter. 55. Acid present in fizzy drinks and soda drinks A) Acetic acid. B) Formic acid. C) Malic acid. D) Carbonic acid. Show Answer Correct Answer: D) Carbonic acid. 56. Which of the following method is suitable to prepare iron(II) sulphate? A) Fe(OH)$_{2}$ + H$_{2}$SO$_{4}$ $\rightarrow$. B) Fe(NO$_{3}$)$_{2}$ + H$_{2}$SO$_{4}$ $\rightarrow$. C) FeCl$_{2}$ + H$_{2}$SO$_{4}$ $\rightarrow$. D) Fe + H$_{2}$SO$_{4}$ $\rightarrow$. Show Answer Correct Answer: D) Fe + H$_{2}$SO$_{4}$ $\rightarrow$. 57. All of the following compounds are soluble except; A) Sodium chloride. B) Silver nitrate. C) Barium sulfate. D) Potassium carbonate. Show Answer Correct Answer: C) Barium sulfate. 58. ..... give relief from WASP STING A) Milk. B) Lemon. C) Vinegar. D) Baking Soda. Show Answer Correct Answer: C) Vinegar. 59. An indicator will ..... when it is in contact with an acid or base A) Stay the same color. B) Bubble. C) Change color. D) Form a new substance. Show Answer Correct Answer: C) Change color. 60. What happens when soap is rubbed on a turmeric stain on a shirt? A) It turns PINK. B) It remains YELLOW. C) It turns RED. D) It turns MAGENTA. Show Answer Correct Answer: C) It turns RED. ← 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 5Class 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