This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 15 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following properties describes salts that contains sodium, potassium or ammonium ions? A) Insoluble in water. B) Produce oxygen gas when heated. C) React with water to produce salt. D) Are soluble in water. Show Answer Correct Answer: D) Are soluble in water. 2. How do acids taste and feel? A) Sour and can cause a burning sensation. B) Bitter and slimy. C) Salty and grainy. D) Sweet and cooling. Show Answer Correct Answer: A) Sour and can cause a burning sensation. 3. What products are produced when we react an acid with an alkali? A) Salt + carbon dioxide + water. B) Salt + hydrogen. C) Salt + water. D) Salt + water + hydrogen. Show Answer Correct Answer: C) Salt + water. 4. If a solution turns blue litmus to red, what colour will be observed if the same is placed on pH paper A) Green. B) Blue. C) Red. D) None. Show Answer Correct Answer: A) Green. 5. The following salt in water does not experience hydrolysis is ..... A) CH3COOK. B) HCOONa. C) K3PO4. D) CASO4. E) Al (CN) 3. Show Answer Correct Answer: D) CASO4. 6. To sodium hydroxide in a beaker, few drops of phenolphthalein were added. What will you observe? A) Blue colour. B) No change in colour. C) Red colour. D) Pink colour. Show Answer Correct Answer: D) Pink colour. 7. Which of the following factors does NOT affect the solubility of a salt in water? A) Temperature. B) Pressure. C) Nature of the solute. D) Color of the salt. Show Answer Correct Answer: D) Color of the salt. 8. Which of the following will give reddish brown colour with turmeric paper strip? A) Acids. B) Bases. C) Neutral substances. D) None of the above. Show Answer Correct Answer: B) Bases. 9. State the name of reaction to Produce Insoluble Salt? State the name of acts of reply to produce unsolved salt? A) Displacement Reaction Action on the enlargement. B) Double Decomposition Reaction Double Decomposition Action. C) Titration Method / Pentitratan Response. D) None of the above. Show Answer Correct Answer: B) Double Decomposition Reaction Double Decomposition Action. 10. Ionic precipitation involves what type of reaction? A) Neutralization. B) Double displacement. C) All the above. D) None of the above. Show Answer Correct Answer: B) Double displacement. 11. Ammonia that turns red litmus blue A) Acidic. B) Basic. C) Neutral. D) Can't say. Show Answer Correct Answer: B) Basic. 12. Which of the followings is an acid salt? A) CH $ _ {3} $ coona. B) NaCl. C) Buy $ _ {3} $. D) That $ _ {2} $ so $ _ {4} $. Show Answer Correct Answer: C) Buy $ _ {3} $. 13. Salt may be Acid, Bases and Neutral A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 14. Acid reacts with metal carbonate to form A) Salt + hydroxide + water. B) Salt + carbon dioxide. C) Salt + water. D) Salt + carbon dioxide + water. Show Answer Correct Answer: D) Salt + carbon dioxide + water. 15. Precipitation involves mixing ..... to form an insoluble solid that separates out from the reaction mixture. A) Acid and alkali. B) Acid and metal. C) Two acids. D) Two solutions. Show Answer Correct Answer: D) Two solutions. 16. When HCl is added to pure water, which of the following will occur? A) The [H+] will increase. B) The pH will decrease. C) The [OH-] will decrease. D) All of the above. Show Answer Correct Answer: D) All of the above. 17. Is heat evolved in neutralisation process? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 18. Salts of nitric acid are named as ..... A) Nitrates. B) Sulphates. C) Carbonates. D) Acetates. Show Answer Correct Answer: A) Nitrates. 19. Common salt beside being used in kitchen can also be used as the raw material for making A) Washing soda. B) Calcium salts. C) Plaster of paris. D) Slaked lime. Show Answer Correct Answer: A) Washing soda. 20. Calculate the solubility of iron(III) hydroxide in a solution in which the pH is 12. A) 4 x 10$^{-38}$ M. B) 4 x 10$^{-36}$ M. C) 4 x 10$^{-30}$ M. D) 2 x 10$^{5}$ M. Show Answer Correct Answer: B) 4 x 10$^{-36}$ M. 21. If you face indigestion, what should you do? A) Nothing. B) Eat food. C) Use antacid like milk of magnesia. D) Take substances with citric acid. Show Answer Correct Answer: C) Use antacid like milk of magnesia. 22. At what temperature is gypsum heated to form Plaster of Paris? A) 90$^\circ$C. B) 100$^\circ$C. C) 110$^\circ$C. D) 120$^\circ$C. Show Answer Correct Answer: B) 100$^\circ$C. 23. A chemistry teacher mixed hydrochloric acid with sodium hydroxide to form a salt. What are present in the salt that forms? A) Sodium chloride. B) Sodium ions and nitrate ions. C) Only sodium ions. D) Only nitrate ions. Show Answer Correct Answer: B) Sodium ions and nitrate ions. 24. Lead (II) Sulphate, PbSO$_{4}$ A) Soluble Salt. B) Insoluble Salt. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insoluble Salt. 25. What is the range of the pH scale for acids? A) 1 to 8. B) 7 to 14. C) 0 to 10. D) 0 to 6.9. Show Answer Correct Answer: D) 0 to 6.9. ← 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