This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 29 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 29 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of these are insoluble? A) Most Carbonates. B) Most Sulphates. C) Most Halides. D) Most Nitrates. Show Answer Correct Answer: A) Most Carbonates. 2. The chemical name of marble is- A) Calcium carbonate. B) Magnesium carbonate. C) Calcium chloride. D) Calcium sulphate. Show Answer Correct Answer: A) Calcium carbonate. 3. What is the colour of FeSO$_{4}$.6H$_{2}$O A) PINK. B) GREEN. C) BLUE. D) WHITE. Show Answer Correct Answer: B) GREEN. 4. Grapes contain A) Malic Acid. B) Oxalic Acid. C) Formic Acid. D) Tartaric Acid. Show Answer Correct Answer: D) Tartaric Acid. 5. Which two things can be used to form salts? A) Charges and pH. B) Bases and pH. C) Acids and pH. D) Acids and bases. Show Answer Correct Answer: D) Acids and bases. 6. What happens when a litmus is added to an acid solution? A) It turns blue. B) It turns green. C) It turns red. D) It turns yellow. Show Answer Correct Answer: C) It turns red. 7. It is known that the following compounds:1.CAF $ _ {2} $ 2.Fe (no $ _ {3} $) $ _ {2} $ 3.K $ _ {3} $ PO $ _ {4} $ 4.Al $ _ {2} $ s $ _ {3} $ 5.ZNSO $ _ {4} $ Based on the data above, the salt that has a pH <7 is ..... A) 1 and 2. B) 1 and 3. C) 2 dan 5. D) 3 and 4. E) 4 and 5. Show Answer Correct Answer: C) 2 dan 5. 8. State whether the following compound is soluble or insoluble. Lead(II) nitrate PbNO$_{3}$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble. 9. SOAP IS MADE UP OF? A) POTASSIUM HYDROXIDE. B) SODIUM HYDROXIDE. C) BOTH ' A' AND 'B'. D) NONE. Show Answer Correct Answer: C) BOTH ' A' AND 'B'. 10. Ant's sting contain ..... Acid A) Formic. B) Ascorbic. C) Hydrochloric. D) Carbonic. Show Answer Correct Answer: A) Formic. 11. What is another name of magnesium sulphate A) Blue vitriol. B) Table salt. C) Epsom Salt. D) Washing soda. Show Answer Correct Answer: C) Epsom Salt. 12. A solution has turned the colour of red litmus paper to blue. The pH of the solution is approximately: A) 2. B) 5. C) 7. D) 10. Show Answer Correct Answer: D) 10. 13. Bases are ..... in taste A) Sweet. B) Sour. C) Chilly. D) Bitter. Show Answer Correct Answer: D) Bitter. 14. In dilute acid the Concentration of water is- A) Less. B) More. C) Equally. D) None of the above. Show Answer Correct Answer: B) More. 15. Which method is used to prepare barium sulfate? A) Add excess solid reactant to acid. B) Titration. C) Precipitation. D) None of the above. Show Answer Correct Answer: C) Precipitation. 16. CH3 COOH is A) Organic acid. B) Mineral acid. C) Both A and B. D) None of These. Show Answer Correct Answer: A) Organic acid. 17. Chemical formula of ammonium hydroxide A) NH4OH. B) CA(OH2). C) All the above. D) None of the above. Show Answer Correct Answer: A) NH4OH. 18. To relieve indigestion, we take an antacid such as ..... , which contains magnesium hydroxide. A) Milk of magnesia. B) Magnesium hydroxide. C) Milk of hydroxide. D) Calcium hydroxide. Show Answer Correct Answer: A) Milk of magnesia. 19. Which of the following reactions form only salt and hydrogen gas? A) Zinc carbonate and hydrochloric acid. B) Magnesium and sulphuric acid. C) Copper(II) oxide and nitric acid. D) Calcium hydroxide and hydrochloric acid. Show Answer Correct Answer: B) Magnesium and sulphuric acid. 20. Give the name of an ion PO4 $^{3-}$: A) Metaphosphate. B) Diphosphate. C) Phosphate. D) None of the above. Show Answer Correct Answer: C) Phosphate. 21. What is a strong base? A) Solution producing high concentration of hydroxyl ions (OH-). B) Solution producing high concentration of hydroxyl ions (OH-). C) Solution producing high concentration of hydrogen ions(H+). D) Solution producing a low concentration of hydrogen ions. Show Answer Correct Answer: A) Solution producing high concentration of hydroxyl ions (OH-). 22. Substances which taste bitter and feel soapy on touching are known as A) Acids. B) Bases. C) Salts. D) Neutral. Show Answer Correct Answer: B) Bases. 23. Which form of Turmeric is used as an indicator? A) Strips. B) Paste. C) No change. D) Liquid. Show Answer Correct Answer: B) Paste. 24. Bases are soapy to touch. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 25. What are alkalis? A) Acids that do not dissolve in water. B) Bases that dissolve in water. C) Acid that dissolve in water. D) Bases that do not dissolve in water. E) None of the above. Show Answer Correct Answer: B) Bases that dissolve in water. ← 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 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books