This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Salts > Class 7 Science Chapter 4 Salts – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 7 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How do you separate an excess insoluble reactant from a solution? A) Filtration. B) Precipitation. C) Crystalisation. D) Evaporation. Show Answer Correct Answer: A) Filtration. 2. NAOH + HCL gives ..... and ..... A) NACL, H20. B) NACL, CO2. C) All the above. D) None of the above. Show Answer Correct Answer: A) NACL, H20. 3. When acid reacts to base it forms A) Salt+Water. B) Salt+CO2. C) Only water and Co2. D) Only salt. Show Answer Correct Answer: A) Salt+Water. 4. When compound M is heated, a brown gas is evolved and black residue is left behind. M could be A) Lead(II) nitrate. B) Copper(II) nitrate. C) Zinc carbonate. D) Magnesium nitrate. Show Answer Correct Answer: B) Copper(II) nitrate. 5. Which element reacts with dilute sulfuric acid to produce hydrogen? A) Zinc. B) Copper. C) Chlorine. D) Carbon. Show Answer Correct Answer: A) Zinc. 6. Which of the following is not a natural indicator? A) Turmeric. B) Litmus. C) Phenolphthalein. D) Red Cabbage. Show Answer Correct Answer: C) Phenolphthalein. 7. In which of the following Oxalic acid is not present? A) Spinach. B) Tomatoes. C) Apples. D) Guava. Show Answer Correct Answer: C) Apples. 8. A salt is formed when nitric acid reacts with sodium hydroxide. What is the name of the salt? A) Unique. B) Sodium nitrate. C) Sodium chloride. D) Hydrogen Nitrate. Show Answer Correct Answer: B) Sodium nitrate. 9. When acid is put in water it releases which ions A) Oxygen ion. B) Hydroxide ions. C) Hydrogen ions. D) None of these. Show Answer Correct Answer: C) Hydrogen ions. 10. What salt is produced if you react Copper oxide with Sulfuric acid? A) Copper sulfate. B) Copper phosphate. C) Copper nitrate. D) Copper chloride. Show Answer Correct Answer: A) Copper sulfate. 11. The molar solubility of PbI$_{2}$ is 1.52 x 10$^{-3}$ M. Calculate the value of K$_{sp}$ for PbI$_{2}$. A) 1.52 x 10$^{-3}$. B) 4.62 x 10$^{-6}$. C) 1.40 x 10$^{-8}$. D) 3.51 x 10$^{-9}$. Show Answer Correct Answer: C) 1.40 x 10$^{-8}$. 12. What is organic acid? A) Occur naturally. B) Sulphuric acid. C) Malic acid. D) Nitric acid. Show Answer Correct Answer: C) Malic acid. 13. What is the difference of water molecules between Gypsum and Plaster of Paris? A) 1.5. B) 1. C) 2. D) 0.5. Show Answer Correct Answer: A) 1.5. 14. Which method of preparation can be used to make a sample of sample of copper carbonate? A) Metal and acid. B) Acid and base. C) Precipitation. D) None of the above. Show Answer Correct Answer: C) Precipitation. 15. What is the name of the compound Fe2O3? A) Oxide. B) Thiosulphate. C) Sulfate. D) None of the above. Show Answer Correct Answer: A) Oxide. 16. ..... is used as an Antacid. A) Magnesium Hydroxide. B) Sodium Hydroxide. C) Calcium Hyrdroxide. D) Ammonium Hydroxide. Show Answer Correct Answer: A) Magnesium Hydroxide. 17. Which of the following is not a type of salt? A) Normal salts. B) Soluble salt. C) Acid salts. D) Double salts. Show Answer Correct Answer: B) Soluble salt. 18. What is the colour change observed with phenolphthalein when adding acid to alkali? A) Blue $\rightarrow$ red. B) Orange $\rightarrow$ pink. C) Pink $\rightarrow$ colourless. D) Green $\rightarrow$ yellow. Show Answer Correct Answer: C) Pink $\rightarrow$ colourless. 19. Indicator is a substance which shows different colours in acidic and basic solutions. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 20. ORGANIC ACIDS ARE PRESENT IN A) MINERALS. B) TURMERIC. C) FRUITS AND VEGETABLES. D) PHENOPHTHALIN. Show Answer Correct Answer: C) FRUITS AND VEGETABLES. 21. The solubility of silver hydroxide is greatly decreased in a ..... A) Basic solution. B) Acidic solution. C) Neutral solution. D) None of the above. Show Answer Correct Answer: A) Basic solution. 22. Which reactants will not produce salt and water?Bahan tindak balas manakah tidak akan menghasilkan garam dan air? A) Sodium hydroxide and nitric acidnatrium hydroxide and nitric acid. B) Potassium hydroxide and ethanoic acidKalium hidroksida dan asid etanoik. C) Copper (II) carbonate and sulphuric acid Kuprum (II) karbonat dan asid sulfurik. D) Copper (II) Oxide and Hydrochloric Acid Kuprum (II) oxide and hydrochloric acid. Show Answer Correct Answer: C) Copper (II) carbonate and sulphuric acid Kuprum (II) karbonat dan asid sulfurik. 23. The pH of a dilute base A) 6. B) 7. C) 14. D) 8. Show Answer Correct Answer: D) 8. 24. What is the color of hydrated copper sulphate? A) Green. B) Pink. C) Blue. D) White. Show Answer Correct Answer: C) Blue. 25. What color will Red litmus paper will change in Acid? A) Blue. B) Red. C) Everything is possible. D) No color change. Show Answer Correct Answer: D) No color change. 26. ..... are soluble. A) All carbonates. B) All chlorides. C) All nitrates. D) All sulfates. Show Answer Correct Answer: C) All nitrates. 27. The most commonly used natural indicator is ..... it is extracted from ..... A) Turmeric extracted from turmeric plant. B) Litmus extracted from lichens. C) China rose extracted from China rose plant. D) Phenolphthalein extracted from lichens. Show Answer Correct Answer: B) Litmus extracted from lichens. 28. Barium chloride / Barium klorida A) Barium hydroxide + hydrochloric acidbarium hydroxide + asdi hydrochloric. B) Barium hydroxide + potassium chloridebarium hydroxide + potassium chloride. C) Barium nitrate + potassium chloridebarium nitrat + potassium klorida. D) None of the above. Show Answer Correct Answer: A) Barium hydroxide + hydrochloric acidbarium hydroxide + asdi hydrochloric. 29. What are some common examples of acids? A) Citric acid, sulfuric acid, hydrochloric acid, and acetic acid. B) Sodium hydroxide, potassium hydroxide, calcium hydroxide, and magnesium hydroxide. C) Lactic acid, nitric acid, carbonic acid, and phosphoric acid. D) Ammonia, bleach, vinegar, and baking soda. Show Answer Correct Answer: A) Citric acid, sulfuric acid, hydrochloric acid, and acetic acid. 30. Show neutral salt: A) BaCl2. B) Nahda. C) NaKSO4. D) None of the above. Show Answer Correct Answer: A) BaCl2. 31. Give the name of an ion Cl$^{-}$: A) Chloride. B) Perchlorate. C) Hypochlorite. D) None of the above. Show Answer Correct Answer: A) Chloride. 32. Magnesium + sulphuric acid $\rightarrow$? A) Magnesium sulfate + water. B) Magnesium chloride + hydrogen. C) Magnesium sulfate + hydrogen. D) Magnesium chloride + water. Show Answer Correct Answer: C) Magnesium sulfate + hydrogen. 33. Which of the following are the physical characteristics of salt crystal?I They have similar size. II They have fixed angle.III They have fixed geometrical shapes.IV They have flat surface, straight edges and sharp angles. 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: D) II, III and IV and IV. 34. In a reaction between an acid and a carbonate gas bubbles will appear. What is that gas? A) Oxygen. B) Hydrogen. C) Carbon dioxide. D) Helium. Show Answer Correct Answer: C) Carbon dioxide. 35. Compound aluminum sulfate is classified as: A) Neutral salt. B) Acidic salt. C) Basic salt. D) None of the above. Show Answer Correct Answer: A) Neutral salt. 36. Magnesium sulphate / Magnesium sulfat A) Magnesium hydroxide + sodium sulphate magnesium hydroxide + sodium sulfate. B) Magnesium nitrate + ammonium sulphateMagnesium nitrat + ammonium sulfat. C) Magnesium + sulphuric acidMagnesium + asid sulfurik. D) None of the above. Show Answer Correct Answer: C) Magnesium + sulphuric acidMagnesium + asid sulfurik. 37. What two substances must combine to make a basic salt A) Strong acid and strong base. B) Strong acid and weak base. C) Weak acid and strong base. D) Weak acid and weak base. Show Answer Correct Answer: C) Weak acid and strong base. 38. One benefit of Red Cabbage Juice Indicator is that it ..... A) It is very expensive. B) Tells you the exact pH. C) Is very accurate. D) It can be made from materials you have at home. Show Answer Correct Answer: D) It can be made from materials you have at home. 39. What two substances must combine to make a neutral salt A) Strong acid and strong base. B) Strong acid and weak base. C) Weak acid and strong base. D) Weak acid and weak base. Show Answer Correct Answer: A) Strong acid and strong base. 40. When blue litmus is dipped into a solution of Sodium Chloride A) Blue litmus turns red. B) It stays blue. C) Red litmus turns blue. D) None of the above. Show Answer Correct Answer: B) It stays blue. 41. Assertion (A):Pure water is neither acidic nor basic.Reason (R):The pH of a solution is inversely proportional to the concentration of hydrogenions in it. A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is not the correct explanation of A. C) A is true but R is false. D) A is false but R is true. Show Answer Correct Answer: B) Both A and R are true but R is not the correct explanation of A. 42. In an experiment, a student adds a salt to water and observes that it does not dissolve. Which of the following could be a reason for this observation? A) The salt is insoluble in water. B) The water is too cold. C) The salt is already saturated. D) The salt is soluble in water. Show Answer Correct Answer: A) The salt is insoluble in water. 43. How do we convert the factory waste? A) Acids. B) Base. C) Salt. D) Phenolphthalein. Show Answer Correct Answer: B) Base. 44. Which of the following is not a natural occuring indicator? A) Phenolphthalein. B) Litmus. C) China rose. D) Turmeric. Show Answer Correct Answer: A) Phenolphthalein. 45. An element X forms a hydroxide which dissolves both in acids and in alkalis. What could X be? A) Aluminium. B) Iron. C) Calcium. D) Copper. Show Answer Correct Answer: A) Aluminium. 46. SULPHURIC ACID CHEMICAL FORMULA IS A) H2SO4. B) HCl. C) NaOH. D) NaCL. Show Answer Correct Answer: A) H2SO4. 47. Sulphate (VI) iron (III) is ..... A) Disabled $ _ {4} $. B) Fe$_{2}$SO$_{4}$. C) Fe$_{3}$(SO$_{4}$)$_{2}$. D) Fe$_{2}$(SO$_{4}$)$_{3}$. Show Answer Correct Answer: D) Fe$_{2}$(SO$_{4}$)$_{3}$. 48. Salts that are made with sulfuric acid are called ..... A) Sulfates. B) Chlorides. C) Nitrates. D) Carbonates. Show Answer Correct Answer: A) Sulfates. 49. Methyl Orange changes color to ..... in Acidic Solution and ..... in Basic Solution. A) Orange, Red. B) Red, Orange. C) Yellow, Orange. D) Red, Yellow. Show Answer Correct Answer: D) Red, Yellow. 50. How can we prevent sodium from reacting? A) By keeping it under a layer of oil. B) By keeping it cool. C) By galvanising it. D) By heating it. Show Answer Correct Answer: A) By keeping it under a layer of oil. 51. Which is a way Salt can be formed? A) Acid + Alkali. B) Neutralization. C) Metal + Acid. D) All of the above. Show Answer Correct Answer: D) All of the above. 52. When making an insoluble salt, why do we wash the filter paper with distilled water? A) To remove insoluble impurities. B) To rinse more product through the filter paper. C) To remove soluble impurities. D) To make a more dilute solution. Show Answer Correct Answer: C) To remove soluble impurities. 53. Chemical name of Lime Water ..... A) Calcium Hydroxide. B) Calcium bisulphate. C) Calcium oxide. D) Calcium Carbonate. Show Answer Correct Answer: A) Calcium Hydroxide. 54. Acidic solutions turn china rose petal solution ..... A) Dark pink. B) Green. C) No effect. D) Blue. Show Answer Correct Answer: A) Dark pink. 55. What is the effect of temperature on the solubility of most solid salts in water? A) Solubility decreases with temperature. B) Solubility first increases then decreases. C) Temperature has no effect on solubility. D) Solubility increases with temperature. Show Answer Correct Answer: D) Solubility increases with temperature. 56. COOL DRINKS ARE MALEIC ACID. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 57. Name the Acidd present in Apple A) Citric acid. B) Mallic acid. C) Oxalic acid. D) Tartaric acid. Show Answer Correct Answer: B) Mallic acid. 58. Which of the following can be prepared by using neutralization between base and acid? Which of the following can be provided through neutralization between the base and acid? A) Lead (II) Chromate / Plumbum (II) Chromate. B) Iron (II) chloride / Ferum (II) chlorder. C) Sodium sulphate / natrium sulfat. D) Silver bromide / argentum bromide. Show Answer Correct Answer: B) Iron (II) chloride / Ferum (II) chlorder. 59. Acidic soil is treated with bases like A) Calcium Hydroxide. B) Magnesium Hydroxide. C) Milk of Magnesia. D) None of the above. Show Answer Correct Answer: A) Calcium Hydroxide. 60. A salt derived from strong acid and weak base will dissolve in water to give a solution which is- A) Acidic. B) Basic. C) Neutral. D) None of these. Show Answer Correct Answer: A) Acidic. ← 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 8Class 7 Science Chapter 4 Salts Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books