This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Salts > Class 7 Science Chapter 4 Salts – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When metals react with acids they form- A) Salt + Hydrogen gas. B) Neutralization reaction occurrs. C) Salt. D) Salt + Water. Show Answer Correct Answer: A) Salt + Hydrogen gas. 2. Ionic equation of Pb(NO$_{3}$)$_{2}$ + Na$_{2}$CO$_{3}$ $\rightarrow$ PbCO$_{3}$ + 2NaNO$_{3}$Persamaan ion bagi PbSO$_{4}$ + Na$_{2}$CO$_{3}$ $\rightarrow$ PbCO$_{3}$ + Na$_{2}$SO$_{4}$ A) 2pb $^{ +} $ + co $ _ {3} $ $^{2-} $ $\rightarrow$ Pbco $ _ {3} $. B) Na$^{2+}$ + NO$_{3}$$^{2-}$$\rightarrow$ 2NaNO$_{3}$. C) Pb $^{2 +} $ + co $ _ {3} $ $^{2-} $ $\rightarrow$ pbco $ _ {3} $. D) $ 2NA^{ +} $ + 2no $ _ {3} $$^{-} $ $\rightarrow$ 2nano $ _ {3} $. Show Answer Correct Answer: C) Pb $^{2 +} $ + co $ _ {3} $ $^{2-} $ $\rightarrow$ pbco $ _ {3} $. 3. ..... can be corrosive. A) Acids. B) Bases. C) Acids and bases. D) Neutral substances. Show Answer Correct Answer: C) Acids and bases. 4. Compound potassium sulfide is classified as: A) Basic salt. B) Neutral salt. C) Acidic salt. D) None of the above. Show Answer Correct Answer: B) Neutral salt. 5. Select od one out A) Litmus. B) Turmeric. C) Hibiscus. D) Phenolphthalein. Show Answer Correct Answer: D) Phenolphthalein. 6. Sodium hydroxide and hydrochloric acid neutralise each other and form salt and water A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. Sodium hydroxide ph is? A) 5.5. B) 14. C) 13. D) 7. Show Answer Correct Answer: B) 14. 8. State whether the following compound is soluble or insoluble. Barium sulfate BaSO$_{4 }$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insoluble. 9. When Siya dips blue litmus to a solution which turns it to red, what is the most logical conclusion you can draw from that? A) Solution is acidic. B) PH of the solution is 7. C) PH of the solution is 2. D) Solution is basic. Show Answer Correct Answer: A) Solution is acidic. 10. Which of the following does solubility depend on pH? A) Lead hydroxide. B) Lead nitrate. C) Lead perchlorate. D) Lead chloride. Show Answer Correct Answer: A) Lead hydroxide. 11. Which of the following methods can be used to dry the solid?I) using a filter paperII) put it in a desiccatorIII) Put it in an oven A) I & III only. B) I, III. C) II & III only. D) I & II only. Show Answer Correct Answer: B) I, III. 12. Salt and water is formed when there is a chemically reaction between which two? A) Acids and pH. B) Bases and acids. C) PH and bases. D) Charges and pH. Show Answer Correct Answer: B) Bases and acids. 13. LITMUS PAPER IS AVAILABLE IN THESE TWO COLOURS? A) BLUE ONLY. B) RED ONLY. C) BOTH BLUE AND RED. D) ONY WHITE. Show Answer Correct Answer: C) BOTH BLUE AND RED. 14. Window cleaners generally contains ..... A) Potassium Hydroxide. B) Magnesium Hydroxide. C) Ammonium Hydroxide. D) Sodium Hydroxide. Show Answer Correct Answer: C) Ammonium Hydroxide. 15. The solutions which do not change colour of either red or blue litmus are known as ..... solutions. A) Salty. B) Basic. C) Neutral. D) Acidic. Show Answer Correct Answer: C) Neutral. 16. Which of the following statements best define the term 'salt'? A) Salt is formed when metal reacts with an alkali. B) Salt contains sodium ions and chloride ions. C) Salt is formed from a weak Van der Waals' forces of attraction. D) Salt is formed when the hydrogen ions in an acid is replaced by metal or ammonium ions. Show Answer Correct Answer: D) Salt is formed when the hydrogen ions in an acid is replaced by metal or ammonium ions. 17. Compound sodium hydrogencarbonate is classified as: A) Acidic salt. B) Basic salt. C) Amphotheric hydroxide. D) None of the above. Show Answer Correct Answer: A) Acidic salt. 18. Litmus is extracted from which natural thing? A) Lichen. B) Moss. C) Plant. D) Fungi. Show Answer Correct Answer: A) Lichen. 19. Compound beryllium hydroxide is classified as: A) Basic salt. B) Amphotheric hydroxide. C) Hydroxide. D) None of the above. Show Answer Correct Answer: B) Amphotheric hydroxide. 20. Sodium Chloride, NaCl A) Soluble salt. B) Insoluble salt. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble salt. 21. What is the reactant, when the product is salt and water A) Acid and salt. B) Acid and water. C) Acid and base. D) Base and water. Show Answer Correct Answer: C) Acid and base. 22. Assertion:pH = 7 signifies pure water.Reason:pH of acetic acid is greater than 7. 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: C) A is true but R is false. 23. Magnesium and hydrochloric acid are mixed together in a beaker, hydrogen is produced as well as magnesium chloride.Choose correct word equation A) Magnesium chloride + hydrogen $\rightarrow$ magnesium + hydrochloric acid. B) Magnesium + hydrochloric acid $\rightarrow$ magnesium chloride + hydrogen. C) All the above. D) None of the above. Show Answer Correct Answer: B) Magnesium + hydrochloric acid $\rightarrow$ magnesium chloride + hydrogen. 24. What will happen if treat onion extract with baking soda? A) Onion will loose its smell. B) Onion will retain its smell. C) No change will occur. D) None of these. Show Answer Correct Answer: A) Onion will loose its smell. 25. Which of the following is not a component of acid rain? A) Sulphuric acid. B) Carbonic acid. C) Hydrochloric acid. D) Nitric acid. Show Answer Correct Answer: C) Hydrochloric acid. 26. Juice of Hibiscus turns green when added to a A) ACID. B) BASE. C) All the above. D) None of the above. Show Answer Correct Answer: B) BASE. 27. Lemons have which acid present? A) Citric Acid. B) Lactic Acid. C) Nitric Acid. D) Sulphuric Acid. Show Answer Correct Answer: A) Citric Acid. 28. Litmus is extraced from ..... A) Lichens. B) Herbs. C) Cockroach. D) Flower. Show Answer Correct Answer: A) Lichens. 29. Acid is not corrosive to nature? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 30. Blue litmus is dipped in a solution. It remains blue. What could be the nature of this solution? A) Acidic or neutral. B) Acidic. C) Neutral. D) Basic. E) Basic or neutral. Show Answer Correct Answer: E) Basic or neutral. 31. State whether the following compound is soluble or insoluble. BaSO$_{4}$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insoluble. 32. Used in treatment of Sewage water A) Ammonium Hydroxide. B) Calcium oxide. C) Calcium Carbonate. D) Calcium Hydroxide. Show Answer Correct Answer: D) Calcium Hydroxide. 33. Magnesium + Hydrochloric acid $\rightarrow$ Magnesium chloride + hydrogenChoose correct reactants A) Magnesium and hydrochloric acid. B) Magnesium chloride and hydrogen. C) All the above. D) None of the above. Show Answer Correct Answer: A) Magnesium and hydrochloric acid. 34. What is the treatment for indigestion? A) Lime of Magnesia. B) Magnesium oxide. C) Milk of Amnesia. D) Magnesium hydroxide. Show Answer Correct Answer: D) Magnesium hydroxide. 35. On the pH scale what numbers are bases? A) 7. B) 1. C) 0-7. D) 8-14. Show Answer Correct Answer: D) 8-14. 36. A solution of sodium carbonate has pH around 13. The nature of solution is A) Strongly Acidic. B) Strongly alkaline. C) Weakly alkaline. D) Weakly Acidic. Show Answer Correct Answer: B) Strongly alkaline. 37. Calcium carbonate reacts with nitric acid to form? A) Calcium nitrate. B) Calcium sulfate. C) Calcium chloride. D) Calcium oxide. Show Answer Correct Answer: A) Calcium nitrate. 38. Lucky is making a lemon cake and is not sure if he has to add baking powder or baking soda. What will you suggest that he add? A) Baking Powder. B) Baking Soda. C) All the above. D) None of the above. Show Answer Correct Answer: B) Baking Soda. 39. When potassium thiocyanate solution is added to solution M, a blood red solution is formed. Solution M contains A) Cu$^{2+}$. B) Fe$^{2+}$. C) Fe$^{3+}$. D) Pb$^{2+}$. Show Answer Correct Answer: C) Fe$^{3+}$. 40. What two pieces of equipment are required for filtration? A) Filter and evaporating dish. B) Filter and funnel. C) Evaporating dish and bunsen burner. D) Funnel and stirring rod. Show Answer Correct Answer: B) Filter and funnel. 41. An oxide is acidic and has a pungent odour. It could be A) Nitrogen dioxide. B) Carbon dioxide. C) Sodium oxide. D) Sulphur dioxide. Show Answer Correct Answer: A) Nitrogen dioxide. 42. A salt is formed when Zinc oxide reacts with nitric acid. What is the name of the salt? A) Zinc sulfate. B) Zinc carbonate. C) Zinc hydroxide. D) Zinc nitrate. Show Answer Correct Answer: D) Zinc nitrate. 43. Diksha added dilute sulphuric acid to lime water. Will the reaction mixture become hot or cool? A) Hot. B) Cool. C) All the above. D) None of the above. Show Answer Correct Answer: A) Hot. 44. China rose indicator turns acidic solutions to ..... A) Red. B) Dark pink. C) Green. D) Yellow. Show Answer Correct Answer: B) Dark pink. 45. Calcium Carbonate, CaCO$_{3}$ A) Soluble Salt. B) Insoluble Salt. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insoluble Salt. 46. Which of the following salt is soluble in water? A) Silver chloride. B) Lead(II) carbonate. C) Barium sulfate. D) Calcium nitrate. Show Answer Correct Answer: D) Calcium nitrate. 47. State whether the following compound is soluble or insoluble. Calcium sulfate CaSO$_{4 }$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insoluble. 48. What does the word insoluble mean? A) Does dissolve. B) Doesn't dissolve. C) Is part of a solid. D) None of the above. Show Answer Correct Answer: B) Doesn't dissolve. 49. Why do you add excess of the insoluble reactant when making a soluble salt? A) To make sure all the acid is used up. B) To separate the solid from the solution. C) To make sure a reaction occurs. D) To have the reaction happen faster. Show Answer Correct Answer: A) To make sure all the acid is used up. 50. Bicarbonate also means- A) Calcium carbonate. B) Potassium carbonate. C) Hydrogen carbonate. D) Sodium carbonate. Show Answer Correct Answer: C) Hydrogen carbonate. 51. Substance which are bitter in taste and soapy in touch is known as A) Acid. B) Salty. C) Base. D) Sweet. Show Answer Correct Answer: C) Base. 52. One drawback to a pH Meter is that it A) Only tells you if a substance is an acid or a base. B) Is very expensive. C) Is not very accurate. D) Is messy. Show Answer Correct Answer: B) Is very expensive. 53. Bases have a pH level between what range? A) 7 and 14. B) 0 and 7. C) 3 and 8. D) 0 and 14. Show Answer Correct Answer: A) 7 and 14. 54. Complete this equation:sulphuric acid + potassium hydroxide $\rightarrow$ A) Potassium sulfate + water. B) Potassium oxide + hydrogen. C) Potassium chloride + water. D) Potassium sulfate + hydrogen. Show Answer Correct Answer: A) Potassium sulfate + water. 55. 5 ml of solution of NaOH is completly neutralized by 4 ml of Hcl. If we take 10 ml of NaOH, the amount of Hcl required to neutralize it will be? A) 16ml. B) 4ml. C) 8ml. D) 12ml. Show Answer Correct Answer: C) 8ml. 56. Is Na$_{2}$CO$_{3}$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble. 57. When few drops of substance X are added to phenolphthalein solution, pink color is observed. The nature of substance X will be A) Acidic. B) Basic. C) Neutral. D) None of the above. Show Answer Correct Answer: B) Basic. 58. In a reaction, we have sulphuric acid with us and a base, the product formed was salt and water, casn you identify the type of salt formed? A) Sulphate. B) Chloride. C) Nitrate. D) None of these. Show Answer Correct Answer: A) Sulphate. 59. Sodium bicarbonate is commonly called A) Washing soda. B) Lime water. C) Baking soda. D) Slaked lime. Show Answer Correct Answer: B) Lime water. 60. What are bases soluble in water called? A) Alkali. B) Alkali. C) Basic salt. D) None of these. Show Answer Correct Answer: A) Alkali. ← 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 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 8Class 7 Science Chapter 4 Salts Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books