This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 3 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which equation correctly shows the displacement of copper by zinc? A) Copper + zinc sulphate $\rightarrow$ copper sulfate + zinc. B) Zinc sulphate + copper $\rightarrow$ copper sulfate + zinc. C) Copper sulfate + zinc $\rightarrow$ zinc sulfate + copper. D) None of the above. Show Answer Correct Answer: C) Copper sulfate + zinc $\rightarrow$ zinc sulfate + copper. 2. Excessive hydrochloric acid in stomach leads to indigestion. Antacid such as ..... neutralised the effect of excessive acid and relieves pain. A) Baking soda or Sodium hydrogen carbonate. B) Lime water or slaked lime. C) Milk of magnesia or magnesium hydroxide. D) None of the above. Show Answer Correct Answer: C) Milk of magnesia or magnesium hydroxide. 3. What is the solubility of iron(III) hydroxide in pure water (remember, pure water contains 1 x 10$^{-7}$ M OH$^{-}$). Ksp for iron(III) hydroxide is 4 x 10$^{-38}$. A) 4 x 10$^{-17}$. B) 4 x 10$^{-6}$. C) 1 x 10$^{-7}$. D) 2.2 x 10$^{-13}$. Show Answer Correct Answer: A) 4 x 10$^{-17}$. 4. Sodium hydroxide + sulphuric acid $\rightarrow$ ..... ? A) Sodium carbonate. B) Sodium sulphate. C) All the above. D) None of the above. Show Answer Correct Answer: B) Sodium sulphate. 5. Filtration is used to separate a ..... from a liquid. A) Undissolved solid. B) Dissolved solid. C) Dissolved gas. D) Undissolved gas. Show Answer Correct Answer: A) Undissolved solid. 6. The substances that taste sour because the contain A) Base. B) Acid. C) Salt. D) Wounds. Show Answer Correct Answer: B) Acid. 7. 'Litmus', a natural dye is an extract of which of the following? A) China daily (jaggery). B) Beetroot. C) Lichen. D) Blue berries (Jamun). Show Answer Correct Answer: C) Lichen. 8. The products of neutralization reaction are: A) Salt, water and heat. B) Salt and water. C) Acid and base. D) Salt and heat. Show Answer Correct Answer: A) Salt, water and heat. 9. THE TERM ACIDS CAME FROM WHICH LATIN WORD? A) ACNE. B) Acre. C) ACIDS. D) ALKALIES. Show Answer Correct Answer: B) Acre. 10. An acid anhydride A) Sulphur dioxide. B) Aluminium oxide. C) Zinc oxide. D) Sodium oxide. Show Answer Correct Answer: A) Sulphur dioxide. 11. Consider The Following Sentences And Choose The Correct Statements: A) Tartaric acid present in unripe mangoes. B) [B]. Formic acid present in ant sting. C) [C]. Lactic acid present in curd . D) [D]. All the above. Show Answer Correct Answer: D) [D]. All the above. 12. Which of the following is/are insoluble salt(s)? A) Barium sulfate. B) Magnesium nitrate. C) Silver nitrate. D) Sodium carbonate. Show Answer Correct Answer: A) Barium sulfate. 13. Is China Rose an Natural Indicator? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 14. Which acid is present in tea A) Tannic acid. B) Glycolic acid. C) All the above. D) None of the above. Show Answer Correct Answer: A) Tannic acid. 15. Silver Chloride, AgCl A) Soluble Salt. B) Insoluble Salt. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insoluble Salt. 16. What is used to preserve pickles, sauce, ketchups? A) Milk. B) Acid. C) Salt. D) Vinegar. Show Answer Correct Answer: D) Vinegar. 17. Zinc Chloride, ZnCl$_{2}$ A) Soluble Salt. B) Insoluble Salt. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble Salt. 18. Methyle orange colour in base A) Red. B) Yellow. C) Colourless. D) Pink. Show Answer Correct Answer: B) Yellow. 19. Is BaSO$_{4}$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insoluble. 20. Which of the following is a common use of salts in daily life? A) As a cleaning agent. B) As a food preservative. C) As a fuel. D) As a metal polish. Show Answer Correct Answer: B) As a food preservative. 21. Name of acid present in VINEGAR A) Acetic acid. B) Formic acid. C) Citric acid. D) Lactic acid. Show Answer Correct Answer: A) Acetic acid. 22. Between the following solutions that can form hydrolyzed salt solutions and are acidic are ..... A) 20 mL CH3COOH 0, 1 M + 20 mL KOH 0, 2 M. B) 20 mL H2SO4 0, 1 M + 20 mL Ba(OH)2 0, 1 M. C) 20 mL Ca(OH)2 0, 1 M + 20 mL HCl 0, 1 M. D) 20 mL NH4OH 0, 1 M + 20 mL HCl 0, 1 M. E) 20 ml HCN 0.1 m + 20 ml NaOH 0.1 m. Show Answer Correct Answer: D) 20 mL NH4OH 0, 1 M + 20 mL HCl 0, 1 M. 23. ACID RAINS ARE DUE TO? A) Ill. B) NO2. C) CO2. D) ALL THE ABOVE. Show Answer Correct Answer: D) ALL THE ABOVE. 24. We should add acid to water while diluting. A) Yes. B) No. C) We should add water to acid while diluting. D) None of the above. Show Answer Correct Answer: A) Yes. 25. Aqua regia is for A) Descaling. B) Disolve noble metals. C) All the above. D) None of the above. Show Answer Correct Answer: B) Disolve noble metals. ← PreviousNext →Related QuizzesClass 7 Science Chapter 4 Salts Quiz 1Class 7 Science Chapter 4 Salts Quiz 2Class 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 10Class 7 Science Chapter 4 Salts Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books