This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 13 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Riddle Time:Coffee is brownAnd bitter in taste.Is it an Acid or Base? A) Acidic. B) Basic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Acidic. 2. What is the name of the practical technique to neutralise an alkali? A) Neutralization. B) Titration. C) Using a burette. D) Telestration. Show Answer Correct Answer: B) Titration. 3. Which base is present in soap A) Sodium hydroxide. B) Calcium hydroxide. C) Potassium hydroxide. D) Both option 1 and 3. Show Answer Correct Answer: D) Both option 1 and 3. 4. Is (nh $ _ {4} $) $ _ {2} $ co $ _ {3} $ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble. 5. Select all the basic salts from the following choices: A) NaCl. B) On $ _ {2} $ co $ _ {3} $. C) KOH. D) K$_{2}$SO$_{4}$. E) NH4CL. Show Answer Correct Answer: B) On $ _ {2} $ co $ _ {3} $. 6. The solubility of AgF will ..... if potassium fluoride is added to the solution. A) Decrease. B) Increase. C) Remain the same. D) None of the above. Show Answer Correct Answer: A) Decrease. 7. To prepare copper sulfate using sulfuric acid, the sample that should be used is? A) Copper carbonate. B) Copper metal. C) All the above. D) None of the above. Show Answer Correct Answer: A) Copper carbonate. 8. Basic solutions turn china rose petal solution ..... A) Red. B) Green. C) No effect. D) Dark pink. Show Answer Correct Answer: B) Green. 9. What is the pH of a 1 x 10$^{-3}$ M solution of HNO$_{3}$? A) 3. B) 2. C) 1. D) 0. Show Answer Correct Answer: A) 3. 10. Which salt would be formed by reacting cobalt carbonate and hydrochloric acid? A) Cobalt sulfate. B) Cobalt chloride. C) Cobalt hydroxide. D) Cobalt sulfide. Show Answer Correct Answer: B) Cobalt chloride. 11. What reactants are needed to prepare (make) copper carbonate? A) Copper and hydrochloric acid. B) Copper and sulfuric acid. C) Copper and nitric acid. D) Copper and carbonic acid. Show Answer Correct Answer: D) Copper and carbonic acid. 12. Methyl orange is a natural indicator. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 13. G of calcium carbonate reacts with 50 cm$^{3}$ of 1 mol dm$^{-3}$ hydrochloric acid, HCl. Determine the mass of calcium carbonate that has not taken part in the reaction.[Relative atomic mass:Ca = 40, C = 12, O = 16] A) 2.5 g. B) 3.8 g. C) 4.3 g. D) 5.5 g. Show Answer Correct Answer: C) 4.3 g. 14. What will happen when acid is poured into the blue litmus and red litmus paper A) Blue litmus becomes colourless in acid and red litmus turns into blue in base. B) Blue litmus turns red in acid and red litmus turns into black in base. C) Both a and b. D) Red litmus turns blue in base and blue litmus turns red in acid. Show Answer Correct Answer: D) Red litmus turns blue in base and blue litmus turns red in acid. 15. Stirring the solution ..... A) Decrease the rate of solubility. B) Doesn't change the rate of solubility. C) Increase the rate of solubility. D) None of the above. Show Answer Correct Answer: C) Increase the rate of solubility. 16. What are Acid salts? A) Salt formed from solution which has Strong Base but weak Acid. B) Salt formed from solution which has Strong Acid but weak Base. C) Salt formed from solution which has Strong acid and Base. D) Salt formed from solution which has weak acid and Base. Show Answer Correct Answer: B) Salt formed from solution which has Strong Acid but weak Base. 17. A change is a chemical change when it is accompanied by: A) Energy change. B) Formation of new substances. C) Change in chemical properties. D) All of the above. Show Answer Correct Answer: D) All of the above. 18. To which colour does phenolphthalein changes when we add it to an acod A) Pink. B) Yellow. C) Red. D) Colourless. Show Answer Correct Answer: D) Colourless. 19. Salts that are made with hydrochloric acid are called ..... A) Chlorides. B) Sulfates. C) Nitrates. D) Carbonates. Show Answer Correct Answer: A) Chlorides. 20. Which of the following statements is correct about an aqueous solution of an acid and of a base?(i) Higher the pH, stronger the acid(ii) Higher the pH, weaker the acid(in) Lower the pH, stronger the base(iv) Lower the pH, weaker the base A) (i) and (iii). B) (ii) and (iii). C) (i) and (iv). D) (ii) and (iv). Show Answer Correct Answer: D) (ii) and (iv). 21. Which Salt is form with the following acid-Sulfuric Acid A) Chloride. B) Sulfate. C) Nitrate. D) None of the above. Show Answer Correct Answer: B) Sulfate. 22. Strong acid + Weak base makes A) Acidic salt. B) Basic salt. C) Neutral salt. D) None of the above. Show Answer Correct Answer: A) Acidic salt. 23. True or False. Antacid is containing Mg(OH)2. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 24. An indicator 'X' on adding to a base turns yellow and when added to an acid it turns red identify the indicator 'X' A) Red cabbage. B) Litmus. C) Phenolphthalein. D) Turmeric. E) Methyl orange. Show Answer Correct Answer: E) Methyl orange. 25. Soap is an example of a ..... A) Acid. B) Base. C) All the above. D) None of the above. Show Answer Correct Answer: B) Base. ← 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