This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Salts > Class 7 Science Chapter 4 Salts – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Equation for Potash Alum is A) $\left[Zn\left(OH\right)_2\right]$. B) $K_2SO_4.Al$. C) $ Nahco_3 $. D) $K_2SO_4.Al_2\left(SO_4\right)_3.24H_2O$. Show Answer Correct Answer: D) $K_2SO_4.Al_2\left(SO_4\right)_3.24H_2O$. 2. The difference in number of water molecules in gypsum and plaster of paris is- A) 1/2. B) 5/2. C) 3/2. D) 2. Show Answer Correct Answer: C) 3/2. 3. Which of these salt can be prepared by decomposition reaction? A) Calcium carbonate. B) Iron sulphide. C) Calcium chloride. D) Sodium chloride. Show Answer Correct Answer: C) Calcium chloride. 4. A substance with a ph of higher that 7.5 is a? A) Acid. B) Base. C) Salt. D) Home dog doggity. Show Answer Correct Answer: B) Base. 5. The effect of ant bite {formic acid} can be neutralised by rubbing ..... which contains zinc carbonate. A) Slaked lime. B) Milk of magnesia. C) Quick lime. D) Calamine lotion. Show Answer Correct Answer: D) Calamine lotion. 6. When litmus is added to a acidic solution it turns A) Blue. B) Red. C) White. D) Pink. Show Answer Correct Answer: B) Red. 7. Why is excess Copper (II) oxide added to dilute Sulphuric (VI) acid during the preparation of Copper (II) sulphate? A) To ensure that all the Copper (II) oxide has reacted. B) To remove excess Copper (II) oxide. C) To ensure that all the acid has reacted. D) To ensure that the salt is formed faster. Show Answer Correct Answer: C) To ensure that all the acid has reacted. 8. The correct way of making a solution of acid in water is to A) Put water in acid. B) Put acid in water. C) Put acid and mix. D) None of these. Show Answer Correct Answer: B) Put acid in water. 9. The word 'acid' comes from Latin word A) Salt. B) Sour. C) Base. D) Acidus. Show Answer Correct Answer: D) Acidus. 10. Vitamin C is actually ..... acid. A) Tartaric Acid. B) Citrus Acid. C) Ascorbic Acid. D) Nitric Acid. Show Answer Correct Answer: C) Ascorbic Acid. 11. Which one of the following is the king of acids? A) Sulfuric acid. B) Nitric acid. C) Hydrochloric acid. D) Carbonic acid. Show Answer Correct Answer: A) Sulfuric acid. 12. Before testing carbonate ion, one reagent is need to add together with carbonate ion.What is the reagent? Before testing carbonate ions, one reagent needs to be added together with carbonate ions.What is reagent? A) Hydrochloric Acid / Acid Hydrochloric. B) Iron (2) Sulphate / Wild (2) Sulfat. C) Sodium hydroxide / sodium hydroxide. D) Distilled water / air suling. Show Answer Correct Answer: A) Hydrochloric Acid / Acid Hydrochloric. 13. ACIDS HAVE A SWEET TASTE. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 14. Which Salt is form with the following acid-Hydrochloric Acid A) Chloride. B) Sulfate. C) Nitrate. D) None of the above. Show Answer Correct Answer: A) Chloride. 15. Name the Reaction made By salts when acidic and basic react with each other? A) Basic salt. B) Acidic Salt. C) Neutralization Reaction. D) Baking soda. Show Answer Correct Answer: C) Neutralization Reaction. 16. Acid +metal gives ..... + ..... A) Salt + hydrogen. B) Salt + oxygen. C) All the above. D) None of the above. Show Answer Correct Answer: A) Salt + hydrogen. 17. Salt has Solubility because it dissolves in water. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 18. True or false:The number 7 on the pH scale indicates that a substance is neutral. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 19. What are the products of neutralisation reaction? A) Acid and base. B) Salt and water. C) Acid and water. D) Base and water. Show Answer Correct Answer: B) Salt and water. 20. All alkalies are bases and all bases are alkalies. YES/NO A) YES. B) NO. C) CANNOT BE ANSWERED. D) None of the above. Show Answer Correct Answer: B) NO. 21. Which of the following salts is insoluble? A) Calcium carbonate. B) Aluminium chloride. C) Copper (II) Sulphate. D) Sodium chloride. Show Answer Correct Answer: A) Calcium carbonate. 22. Colour of litmus in distilled water: A) Purple. B) Red. C) White. D) Blue. Show Answer Correct Answer: A) Purple. 23. Baking powder contains, baking soda and- A) Sodium carbonate. B) Potassium hydrogen tartarate. C) Vinegar. D) Calcium bicarbonate. Show Answer Correct Answer: B) Potassium hydrogen tartarate. 24. In order to obtain a soluble salt from a solution, which of the following methods should be used A) Filtration. B) Crystallization. C) Distillation. D) Fractional distillation. Show Answer Correct Answer: B) Crystallization. 25. What is the taste of acid? A) Sour. B) Bitter. C) Salty. D) Sweet. Show Answer Correct Answer: A) Sour. 26. How do you know when a reaction between a metal and an acid is complete? A) All the metal is dissolved. B) There is a color change in the acid. C) Bubbles don't form when more metal is added. D) All the acid evaporates. Show Answer Correct Answer: C) Bubbles don't form when more metal is added. 27. Which of the following gives on heating? A) Soda ash. B) Quick lime. C) Lime stone. D) Slaked. Show Answer Correct Answer: C) Lime stone. 28. Select the acids produced in our stomach. A) Acetic acid. B) Sulphuric acid. C) Nitric acid. D) Hydrochloric acid. Show Answer Correct Answer: D) Hydrochloric acid. 29. Calculate the [OH$^{-}$] if the pH is 10.5 A) 3.5 M. B) 3.2 x 10$^{-4}$ M. C) 1 x 10$^{-7}$ M. D) 3.2 x 10$^{-11}$ M. Show Answer Correct Answer: B) 3.2 x 10$^{-4}$ M. 30. State whether the following compound is soluble or insoluble. Copper(II) carbonate CuCO$_{3 }$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insoluble. 31. How many types of acid is there? A) 5. B) 1. C) 2. D) 3. Show Answer Correct Answer: C) 2. 32. A student was carrying out a test for anions and cations. He added acidified barium nitrate solution to an unknown solution and it remained unchanged. What can be concluded from this? A) SO$_{4}$$^{2-}$ was present. B) SO$_{4}$$^{2-}$ was absent. C) NO$_{3 }$$^{-}$ was present. D) Cl$^{-}$ was absent. Show Answer Correct Answer: B) SO$_{4}$$^{2-}$ was absent. 33. Solution X is mixed with the following reagents. i) dilute sulphuric acidii) iron(II) sulphateiii) concentrated sulphuric acidBrown ring is formed at the end of the reaction. What is the solution X? A) Barium chloride. B) Potassium sulphate. C) Sodium nitrate. D) Magnesium oxide. Show Answer Correct Answer: C) Sodium nitrate. 34. Which of the following reagents are suitable to prepare lead (II) sulphate salt? A) Lead (II) oxide and sulphuric acid. B) Lead (II) carbonate and sulphuric acid. C) Lead (II) nitrate and potassium sulphate. D) Lead (II) chloride and sodium sulphate. Show Answer Correct Answer: C) Lead (II) nitrate and potassium sulphate. 35. Which of the following salts are prepared by double decomposition reaction?I. Calcium sulphateII. Potassium carbonateIII. Silver chlorideIV. Barium sulphate A) I, II, III. B) II, III. C) II, III, IIV. D) I, III and IV. Show Answer Correct Answer: D) I, III and IV. 36. Magnesium hydroxide is found in: A) Soap. B) Milk of magnesia. C) Lime water. D) Vegetable. Show Answer Correct Answer: B) Milk of magnesia. 37. Which of the following soluble salt?Which of the following salts is dissolved? A) CaCO$_{3}$. B) MgCO$_{3}$. C) Feco $ _ {3} $. D) On $ _ {2} $ co $ _ {3} $. Show Answer Correct Answer: D) On $ _ {2} $ co $ _ {3} $. 38. Mg(NO$_{3}$)$_{2}$ is A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble. 39. Which type of salt the following salt are classiffied as?"NH$_{4}$Br" A) Neutral salt. B) Acidic salt. C) Basic salt. D) None of the above. Show Answer Correct Answer: B) Acidic salt. 40. Zinc nitrate can be prepared by reacting nitric acid with excess solid. Which of the following solids cannot be used in the preparation of zinc nitrate? A) Zinc oxide. B) Zinc carbonate. C) Zinc. D) Zinc sulfate. Show Answer Correct Answer: D) Zinc sulfate. 41. When producing a soluble salt in a reaction between an acid and an alkali, how can you prepare dry solid crystals from the solution? A) Filtration. B) Neutralization. C) Condensation. D) Evaporation/crystallisation. Show Answer Correct Answer: D) Evaporation/crystallisation. 42. Expansion and contraction of metals is a: A) Physical change. B) Chemical change. C) Irreversible change. D) None of these. Show Answer Correct Answer: A) Physical change. 43. Which one of the given is an organic acid? A) Citric acid. B) Hydrochloric acid. C) Lactic acid. D) Both (1) and (3). Show Answer Correct Answer: D) Both (1) and (3). 44. Tick the incorrectly matched pair A) Oxalic acid-spinach. B) Tartaric acid-grapes. C) Acetic acid-curd. D) Ascorbic acid-amla. Show Answer Correct Answer: C) Acetic acid-curd. 45. State whether the following compound is soluble or insoluble. Ammonium nitrate NH$_{4}$NO$_{3}$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble. 46. Among the following salts when dissolved in water will produce a solution with the highest pH is ..... A) KF. B) NH$_{4}$Cl. C) KBr. D) To. E) KCl. Show Answer Correct Answer: A) KF. 47. Bases that dissolve in water are known as A) Neutral salt. B) Metal. C) Water base. D) Alkali. Show Answer Correct Answer: D) Alkali. 48. Sole are chemical compounds built of ..... A) Metal and non-metal. B) Hydrogen and acid residue. C) Metal and acidic residue. D) Metal and hydroxide group. Show Answer Correct Answer: C) Metal and acidic residue. 49. Which equation correctly shows the displacement of copper by zinc? A) Copper + zinc sulphate $\rightarrow$ copper sulfate + zinc. B) Zinc sulphate + copper $\rightarrow$ copper sulfate + zinc. C) Copper sulfate + zinc $\rightarrow$ zinc sulfate + copper. D) None of the above. Show Answer Correct Answer: C) Copper sulfate + zinc $\rightarrow$ zinc sulfate + copper. 50. Excessive hydrochloric acid in stomach leads to indigestion. Antacid such as ..... neutralised the effect of excessive acid and relieves pain. A) Baking soda or Sodium hydrogen carbonate. B) Lime water or slaked lime. C) Milk of magnesia or magnesium hydroxide. D) None of the above. Show Answer Correct Answer: C) Milk of magnesia or magnesium hydroxide. 51. What is the solubility of iron(III) hydroxide in pure water (remember, pure water contains 1 x 10$^{-7}$ M OH$^{-}$). Ksp for iron(III) hydroxide is 4 x 10$^{-38}$. A) 4 x 10$^{-6}$. B) 4 x 10$^{-17}$. C) 2.2 x 10$^{-13}$. D) 1 x 10$^{-7}$. Show Answer Correct Answer: B) 4 x 10$^{-17}$. 52. Sodium hydroxide + sulphuric acid $\rightarrow$ ..... ? A) Sodium carbonate. B) Sodium sulphate. C) All the above. D) None of the above. Show Answer Correct Answer: B) Sodium sulphate. 53. Filtration is used to separate a ..... from a liquid. A) Dissolved solid. B) Undissolved solid. C) Undissolved gas. D) Dissolved gas. Show Answer Correct Answer: B) Undissolved solid. 54. The substances that taste sour because the contain A) Salt. B) Base. C) Wounds. D) Acid. Show Answer Correct Answer: D) Acid. 55. 'Litmus', a natural dye is an extract of which of the following? A) Lichen. B) Beetroot. C) Blue berries (Jamun). D) China daily (jaggery). Show Answer Correct Answer: A) Lichen. 56. The products of neutralization reaction are: A) Salt, water and heat. B) Salt and water. C) Acid and base. D) Salt and heat. Show Answer Correct Answer: A) Salt, water and heat. 57. THE TERM ACIDS CAME FROM WHICH LATIN WORD? A) ACIDS. B) ACNE. C) Acre. D) ALKALIES. Show Answer Correct Answer: C) Acre. 58. An acid anhydride A) Sodium oxide. B) Zinc oxide. C) Sulphur dioxide. D) Aluminium oxide. Show Answer Correct Answer: C) Sulphur dioxide. 59. Consider The Following Sentences And Choose The Correct Statements: A) Tartaric acid present in unripe mangoes. B) [B]. Formic acid present in ant sting. C) [C]. Lactic acid present in curd . D) [D]. All the above. Show Answer Correct Answer: D) [D]. All the above. 60. Which of the following is/are insoluble salt(s)? A) Silver nitrate. B) Sodium carbonate. C) Barium sulfate. D) Magnesium nitrate. Show Answer Correct Answer: C) Barium sulfate. 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