This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 10 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 10 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Magnesium reacts with dilute sulfuric acid to form? A) Magnesium oxide. B) Magnesium carbonate. C) Magnesium sulfate. D) Magnesium nitrate. Show Answer Correct Answer: C) Magnesium sulfate. 2. 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$_{2}$. 3. The colour of phenolphthalein in acidic medium A) Pink. B) Colourless. C) Red. D) Orange. Show Answer Correct Answer: B) Colourless. 4. Which of the following is not a soluble base A) Sodium oxide. B) Potassium hydroxide. C) Copper oxide. D) Potassium oxide. Show Answer Correct Answer: C) Copper oxide. 5. 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. 6. 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. 7. Which of the following salts does not exist? A) Aluminium carbonate. B) Barium carbonate. C) Ammonium carbonate. D) Zinc carbonate. Show Answer Correct Answer: A) Aluminium carbonate. 8. 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. 9. During a chemistry experiment, what color does Sodium Hydroxide turn phenolphthalein solution? A) Pink. B) Orange. C) Red. D) Colorless. Show Answer Correct Answer: A) Pink. 10. 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. 11. Which of the following method is suitable to prepare iron(II) sulfate? A) Titration. B) Precipitation. C) Acid reacting with base. D) Alkali reacting with ammonium salt. Show Answer Correct Answer: C) Acid reacting with base. 12. Which of the following are acidic in nature? A) Grape(A). B) Sugar cane juice (B). C) Baking soda(C). D) (A) AND (B). Show Answer Correct Answer: D) (A) AND (B). 13. 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+. 14. 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. 15. Is AgCl A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insoluble. 16. Which salt is insoluble in water? Which salt is not soluble in water? A) ZnSO$_{4}$. B) Ba(NO$_{3}$)$_{2}$. C) Lamb $ _ {3} $. D) Glass $ _ {4} $. Show Answer Correct Answer: D) Glass $ _ {4} $. 17. On adding phenolphthalein indicator to a colourless solution, no change is observed. What is the nature of this solution? A) Basic. B) Either acidic or basic. C) Either acidic or neutral. D) Either basic or neutral. Show Answer Correct Answer: C) Either acidic or neutral. 18. Which of these is a double salt A) Dolomite. B) Slaked lime. C) Sodium hydroxide. D) Potassium hydroxide. Show Answer Correct Answer: A) Dolomite. 19. Phenolphthalein ( C20 H14 O4 ) turns ..... in basic solution. A) Green. B) Red. C) Pink. D) Blue. Show Answer Correct Answer: C) Pink. 20. Is the distilled water acidic/basic/neutral? A) Acidic. B) Basic. C) Neutral. D) None of the above. Show Answer Correct Answer: C) Neutral. 21. Which salt can be prepared by adding a metal oxide in excess to an acid, filtration and finally crystallization? A) Copper(II) sulfate. B) Barium sulfate. C) Silver chloride. D) Copper(II) hydroxide. Show Answer Correct Answer: A) Copper(II) sulfate. 22. What is the ph scale in acid base and neutral solutions? A) 7, 8, 10. B) 1, 7, 14. C) 14, 7, 1. D) 5, 0. Show Answer Correct Answer: B) 1, 7, 14. 23. 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. 24. CuO + (X) $\rightarrow$ CuSO$_{4}$ + H$_{2}$O. Here (X) is- A) CuSO $ _ {4} $. B) H$_{2}$SO$_{4}$. C) HCl. D) HNO$_{3}$. Show Answer Correct Answer: B) H$_{2}$SO$_{4}$. 25. 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. ← PreviousNext →Related 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 7Class 7 Science Chapter 4 Salts Quiz 8Class 7 Science Chapter 4 Salts Quiz 9Class 7 Science Chapter 4 Salts Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books