This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 2 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. What is the taste of acid? A) Salty. B) Sweet. C) Sour. D) Bitter. Show Answer Correct Answer: C) Sour. 3. 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. 4. Which of the following gives on heating? A) Slaked. B) Quick lime. C) Lime stone. D) Soda ash. Show Answer Correct Answer: C) Lime stone. 5. Select the acids produced in our stomach. A) Sulphuric acid. B) Nitric acid. C) Hydrochloric acid. D) Acetic acid. Show Answer Correct Answer: C) Hydrochloric acid. 6. Calculate the [OH$^{-}$] if the pH is 10.5 A) 3.2 x 10$^{-4}$ M. B) 3.2 x 10$^{-11}$ M. C) 1 x 10$^{-7}$ M. D) 3.5 M. Show Answer Correct Answer: A) 3.2 x 10$^{-4}$ M. 7. 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. 8. How many types of acid is there? A) 3. B) 5. C) 2. D) 1. Show Answer Correct Answer: C) 2. 9. 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}$$^{2-}$ was present. B) Cl$^{-}$ was absent. C) NO$_{3 }$$^{-}$ was present. D) SO$_{4}$$^{2-}$ was absent. Show Answer Correct Answer: D) SO$_{4}$$^{2-}$ was absent. 10. 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) Sodium nitrate. C) Potassium sulphate. D) Magnesium oxide. Show Answer Correct Answer: B) Sodium nitrate. 11. 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. 12. 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. 13. Magnesium hydroxide is found in: A) Soap. B) Lime water. C) Vegetable. D) Milk of magnesia. Show Answer Correct Answer: D) Milk of magnesia. 14. Which of the following soluble salt?Which of the following salts is dissolved? A) MgCO$_{3}$. B) CaCO$_{3}$. C) Feco $ _ {3} $. D) On $ _ {2} $ co $ _ {3} $. Show Answer Correct Answer: D) On $ _ {2} $ co $ _ {3} $. 15. Mg(NO$_{3}$)$_{2}$ is A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble. 16. 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. 17. 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. B) Zinc sulfate. C) Zinc oxide. D) Zinc carbonate. Show Answer Correct Answer: B) Zinc sulfate. 18. 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. 19. 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. 20. 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). 21. Tick the incorrectly matched pair A) Oxalic acid-spinach. B) Acetic acid-curd. C) Ascorbic acid-amla. D) Tartaric acid-grapes. Show Answer Correct Answer: B) Acetic acid-curd. 22. 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. 23. Among the following salts when dissolved in water will produce a solution with the highest pH is ..... A) To. B) KF. C) KCl. D) KBr. E) NH$_{4}$Cl. Show Answer Correct Answer: B) KF. 24. Bases that dissolve in water are known as A) Water base. B) Alkali. C) Metal. D) Neutral salt. Show Answer Correct Answer: B) Alkali. 25. 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. ← PreviousNext →Related QuizzesClass 7 Science Chapter 4 Salts Quiz 1Class 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 8Class 7 Science Chapter 4 Salts Quiz 9Class 7 Science Chapter 4 Salts Quiz 10Class 7 Science Chapter 4 Salts Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books