This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 7 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the reactant, when the product is salt and water A) Acid and salt. B) Acid and water. C) Acid and base. D) Base and water. Show Answer Correct Answer: C) Acid and base. 2. Assertion:pH = 7 signifies pure water.Reason:pH of acetic acid is greater than 7. A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is not the correct explanation of A. C) A is true but R is false. D) A is false but R is true. Show Answer Correct Answer: C) A is true but R is false. 3. Magnesium and hydrochloric acid are mixed together in a beaker, hydrogen is produced as well as magnesium chloride.Choose correct word equation A) Magnesium chloride + hydrogen $\rightarrow$ magnesium + hydrochloric acid. B) Magnesium + hydrochloric acid $\rightarrow$ magnesium chloride + hydrogen. C) All the above. D) None of the above. Show Answer Correct Answer: B) Magnesium + hydrochloric acid $\rightarrow$ magnesium chloride + hydrogen. 4. What will happen if treat onion extract with baking soda? A) Onion will loose its smell. B) Onion will retain its smell. C) No change will occur. D) None of these. Show Answer Correct Answer: A) Onion will loose its smell. 5. Which of the following is not a component of acid rain? A) Carbonic acid. B) Sulphuric acid. C) Nitric acid. D) Hydrochloric acid. Show Answer Correct Answer: D) Hydrochloric acid. 6. Juice of Hibiscus turns green when added to a A) ACID. B) BASE. C) All the above. D) None of the above. Show Answer Correct Answer: B) BASE. 7. Lemons have which acid present? A) Nitric Acid. B) Citric Acid. C) Lactic Acid. D) Sulphuric Acid. Show Answer Correct Answer: B) Citric Acid. 8. Is PbCl$_{2}$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insoluble. 9. Litmus is extraced from ..... A) Lichens. B) Herbs. C) Cockroach. D) Flower. Show Answer Correct Answer: A) Lichens. 10. Acid is not corrosive to nature? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 11. Blue litmus is dipped in a solution. It remains blue. What could be the nature of this solution? A) Acidic. B) Basic. C) Neutral. D) Basic or neutral. E) Acidic or neutral. Show Answer Correct Answer: D) Basic or neutral. 12. State whether the following compound is soluble or insoluble. BaSO$_{4}$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insoluble. 13. Used in treatment of Sewage water A) Calcium oxide. B) Calcium Hydroxide. C) Calcium Carbonate. D) Ammonium Hydroxide. Show Answer Correct Answer: B) Calcium Hydroxide. 14. Magnesium + Hydrochloric acid $\rightarrow$ Magnesium chloride + hydrogenChoose correct reactants A) Magnesium and hydrochloric acid. B) Magnesium chloride and hydrogen. C) All the above. D) None of the above. Show Answer Correct Answer: A) Magnesium and hydrochloric acid. 15. What is the treatment for indigestion? A) Magnesium oxide. B) Magnesium hydroxide. C) Lime of Magnesia. D) Milk of Amnesia. Show Answer Correct Answer: B) Magnesium hydroxide. 16. On the pH scale what numbers are bases? A) 8-14. B) 0-7. C) 7. D) 1. Show Answer Correct Answer: A) 8-14. 17. A solution of sodium carbonate has pH around 13. The nature of solution is A) Strongly Acidic. B) Weakly alkaline. C) Weakly Acidic. D) Strongly alkaline. Show Answer Correct Answer: D) Strongly alkaline. 18. Calcium carbonate reacts with nitric acid to form? A) Calcium oxide. B) Calcium nitrate. C) Calcium chloride. D) Calcium sulfate. Show Answer Correct Answer: B) Calcium nitrate. 19. Lucky is making a lemon cake and is not sure if he has to add baking powder or baking soda. What will you suggest that he add? A) Baking Powder. B) Baking Soda. C) All the above. D) None of the above. Show Answer Correct Answer: B) Baking Soda. 20. When potassium thiocyanate solution is added to solution M, a blood red solution is formed. Solution M contains A) Fe$^{2+}$. B) Fe$^{3+}$. C) Pb$^{2+}$. D) Cu$^{2+}$. Show Answer Correct Answer: B) Fe$^{3+}$. 21. What two pieces of equipment are required for filtration? A) Filter and evaporating dish. B) Filter and funnel. C) Evaporating dish and bunsen burner. D) Funnel and stirring rod. Show Answer Correct Answer: B) Filter and funnel. 22. Hcl + nacl = A) After. B) HCOH. C) NaCL. D) None of these. Show Answer Correct Answer: C) NaCL. 23. An oxide is acidic and has a pungent odour. It could be A) Sulphur dioxide. B) Carbon dioxide. C) Sodium oxide. D) Nitrogen dioxide. Show Answer Correct Answer: D) Nitrogen dioxide. 24. A salt is formed when Zinc oxide reacts with nitric acid. What is the name of the salt? A) Zinc nitrate. B) Zinc sulfate. C) Zinc carbonate. D) Zinc hydroxide. Show Answer Correct Answer: A) Zinc nitrate. 25. When acids react with metal carbonate they gives- A) H2O. B) CO2. C) Salt. D) Hydronium ion + Salt. E) Salt + H2O + CO2. Show Answer Correct Answer: E) Salt + H2O + CO2. ← 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 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