This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 23 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 23 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Substances that are bitter in taste and feel soapy are called- A) Acids. B) Bases. C) Litmus. D) None of The above. Show Answer Correct Answer: B) Bases. 2. A few drops of sodium hydroxide, NaOH solution, is added to an aqueous solution. A green precipitate is formed. Which of the following may be present in the solution? A) Cu$^{2+}$. B) Fe$^{2+}$. C) Fe$^{3+}$. D) NH$_{4}$$^{+}$. Show Answer Correct Answer: B) Fe$^{2+}$. 3. Which of the following substance is Neutral in Nature? A) Hydrochloric Acid. B) Glucose. C) Sodium Hydroxide. D) Calcium Carbonate. Show Answer Correct Answer: B) Glucose. 4. Charges keep a salt ..... A) Together. B) Separate. C) All the above. D) None of the above. Show Answer Correct Answer: A) Together. 5. What is injected into skin when an ant bites A) Acid. B) Base. C) Salt. D) Water. Show Answer Correct Answer: A) Acid. 6. How do indicators help in determining the nature of a substance? A) By producing a foul smell when heated. B) By emitting a sound when in contact with water. C) By changing color in the presence of acids or bases. D) By becoming heavier in the presence of oxygen. Show Answer Correct Answer: C) By changing color in the presence of acids or bases. 7. Which of the following is a use of a salt as a food preservative? A) Magnesium Sulphate. B) Sodium chloride. C) Ammonium nitrate. D) Sodium Carbonate. Show Answer Correct Answer: B) Sodium chloride. 8. State whether the following compound is soluble or insoluble. Calcium chloride, CaCl$_{2}$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble. 9. Colour of phenolphthalein in acidic solution is: A) Colourless. B) Pink. C) Blue. D) Purple. Show Answer Correct Answer: A) Colourless. 10. What are the properties of bases? A) Bitter taste, slippery feel, and ability to turn red litmus paper blue. B) No taste, dry texture, and ability to turn blue litmus paper yellow. C) Sweet taste, slimy texture, and ability to turn red litmus paper green. D) Sour taste, rough texture, and ability to turn blue litmus paper red. Show Answer Correct Answer: A) Bitter taste, slippery feel, and ability to turn red litmus paper blue. 11. Bryan wants to prepare silver chloride in the science laboratory. Which of the following reactants should he use? A) Silver + hydrochloric acid. B) Silver hydroxide + hydrochloric acid. C) Silver nitrate + potassium chloride. D) Silver + chlorine gas. Show Answer Correct Answer: C) Silver nitrate + potassium chloride. 12. Which of the following ion is responsible for the acidic nature of hydrochloric acid? A) Hydroxide ion. B) Hydrogen ion. C) Hydrochloride ion. D) Chloride ion. Show Answer Correct Answer: B) Hydrogen ion. 13. Calcium Chloride, CaCl$_{2}$ A) Soluble Salt. B) Insoluble Salt. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble Salt. 14. What is formed when neutralization occurs? A) Acid. B) Water. C) Base. D) PH. Show Answer Correct Answer: B) Water. 15. What color does phenolphthalein give when the solution is basic? A) Red. B) Blue. C) Yellow. D) Colorless. Show Answer Correct Answer: D) Colorless. 16. KOH is ..... A) An acid. B) A base. C) A salt. D) An ionic compound. Show Answer Correct Answer: B) A base. 17. Salts that are made with carbonic acid are called ..... A) Chlorides. B) Sulfates. C) Nitrates. D) Carbonates. Show Answer Correct Answer: D) Carbonates. 18. Most Organic Acids Are A) Strong. B) Weak. C) Very strong. D) Extremely dangerous. Show Answer Correct Answer: B) Weak. 19. Which one of the following is an artificial indicator? A) Phinophthelin. B) Phenophthelin. C) Phenophthetin. D) Phenolphthalein. Show Answer Correct Answer: D) Phenolphthalein. 20. Litmus is extracted from ..... ? What is mauve? A) Mosses, litchis. B) Mosses, lichens. C) Lichens, purple. D) Lichens, magenta. Show Answer Correct Answer: C) Lichens, purple. 21. Assertion:Phenolphthalein is an acid-base indicator.Reason:Phenolphthalein gives different colours in acidic and basic medium. 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: A) Both A and R are true and R is the correct explanation of A. 22. Name the salt produced between the reaction of Zinc and hydrochloric acid. A) Zinc hydroxide. B) Zinc oxide. C) Zinc sulfate. D) Zinc chloride. Show Answer Correct Answer: D) Zinc chloride. 23. Which is the insoluble salt produced when silver nitrate reacts with potassium chloride? A) Potassium nitrate. B) Silver chloride. C) All the above. D) None of the above. Show Answer Correct Answer: B) Silver chloride. 24. Methyl orange turn acid ..... and turn base into ..... colour A) Red, yellow. B) Red, blue. C) All the above. D) None of the above. Show Answer Correct Answer: A) Red, yellow. 25. What colour does the solution turn when sulfuric acid is added to copper carbonate? A) Blue. B) Green. C) Clear. D) Purple. Show Answer Correct Answer: A) Blue. ← 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