This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 12 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Methyl orange turns ..... in acid. A) Yellow. B) Red. C) No colour change. D) Green. Show Answer Correct Answer: B) Red. 2. When an ant bites it releases what A) Formic acid. B) A base. C) Magnesium hydroxide. D) None of these. Show Answer Correct Answer: A) Formic acid. 3. What is the chemical formula of siver nitrate A) Fly. B) Naked. C) All the above. D) None of the above. Show Answer Correct Answer: A) Fly. 4. Which of the following is a soluble sulphate salt? Which of the following is dissolved sulfate salt? A) Lead (ii) sulphate / plumbum (ii) sulfate. B) Barium sulphate / Barium sulfat. C) Zinc sulphate / Zink sulfat. D) Calcium sulphate / Kalsium sulfat. Show Answer Correct Answer: C) Zinc sulphate / Zink sulfat. 5. Where is ammonium hydroxide found in? A) Toilet cleaner. B) Window cleaner. C) Detergent. D) Baking soda. Show Answer Correct Answer: B) Window cleaner. 6. Assertion(A):Bases which are soluble in water are called alkalis.Reason(R):All bases are alkalis. A) Both A and R are false. B) Both A and R are true but R is not the correct explanation for A. C) Both A and R are true and R is the correct explanation for A. D) A is true but R is false. Show Answer Correct Answer: D) A is true but R is false. 7. True or false:All bases are alkali. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 8. Which of the following salts is a not a normal salt? A) NaCl. B) K$_{2}$SO$_{4}$. C) NaHCO $ _ {3} $. D) Ca (no $ _ {3} $) $ _ {2} $. Show Answer Correct Answer: C) NaHCO $ _ {3} $. 9. What is mineral acid? A) Produced from chemical substances. B) Occur naturally. C) Change color. D) Oxalic. Show Answer Correct Answer: A) Produced from chemical substances. 10. What are the products of a neutralization reaction? A) Carbon dioxide and water. B) Sugar and water. C) Oil and vinegar. D) Salt and water. Show Answer Correct Answer: D) Salt and water. 11. Acid + Carbonate yields ..... A) Salt + Hydrogen. B) Salt + Water + Carbon Dioxide. C) Salt + Water. D) Salt + Alkali. Show Answer Correct Answer: B) Salt + Water + Carbon Dioxide. 12. Acid turns blue litmus paper ..... and base turns red litmus paper ..... A) Red, blue. B) Blue, red. C) Blue, blue. D) Red, red. E) None of the above. Show Answer Correct Answer: A) Red, blue. 13. Curd, lemon juice, orange juice taste A) Sour. B) Bitter. C) Salty. D) Sweet. Show Answer Correct Answer: A) Sour. 14. Name the salt produced when reacting Magnesium and Hydrochloric acid? A) Magnesium phosphate. B) Magnesium chloride. C) Magnesium nitrate. D) Magnesium sulfate. Show Answer Correct Answer: B) Magnesium chloride. 15. Which method is used to prepare barium sulphate? A) Add excess solid reactant to acid. B) Titration. C) Precipitation. D) None of the above. Show Answer Correct Answer: C) Precipitation. 16. Which one of the following is a mineral acid? A) Amino acid. B) Citric acid. C) Phosphoric acid. D) Tartaric acid. Show Answer Correct Answer: C) Phosphoric acid. 17. Calculate the [H$^{+}$] in a solution that has a pH of 2.73. A) 5.4 x 10$^{-12}$ M. B) 1.9 x 10$^{-3}$ M. C) 2.7 M. D) 11.3 M. Show Answer Correct Answer: B) 1.9 x 10$^{-3}$ M. 18. Salts have metallic and nonmetallic elements. Which of these elements has negative charges? A) Metallic. B) Nonmetallic. C) All the above. D) None of the above. Show Answer Correct Answer: B) Nonmetallic. 19. A solution reacts with crushed egg-shells to give that turns lime-water milky. The solution contains: A) NaCl. B) HCl. C) LiCl. D) KCl. Show Answer Correct Answer: B) HCl. 20. Carbon burns in air to form ..... It is ..... oxide. Its aqueous solution turns ..... litmus ..... A) Carbon dioxide, acidic, blue, red. B) Nitrogen, basic, red, blue. C) Helium, acidic, blue, blue. D) Oxygen, basic, red, red. Show Answer Correct Answer: A) Carbon dioxide, acidic, blue, red. 21. Which one of these is a common salts A) Potassium hydroxide. B) Sodium hydrogen sulphate. C) Basic lead chloride. D) Calcium bicarbonate. Show Answer Correct Answer: A) Potassium hydroxide. 22. Tartaric acid is found in: A) Vinegar. B) Curd. C) Amla. D) Tamarind. Show Answer Correct Answer: D) Tamarind. 23. What is the term for "A compound formed from the positive ions of an acid and the negative ions of a base" ? A) Indicator. B) Catalyst. C) Salt. D) Antacid. Show Answer Correct Answer: C) Salt. 24. The following reaction is a example of what?Hydrochloric acid [HCI] + Sodium hydroxide [NaOH] = Sodium chloride [NaCL] + Water A) Litmus extraction. B) Phenolphthalein. C) Neutralization. D) Acid rain. Show Answer Correct Answer: C) Neutralization. 25. What is the correctly written chemical formula for the ionic compound, potassium nitride? A) KN. B) K$_{3}$N. C) KN$_{3}$. D) KNO$_{3}$. Show Answer Correct Answer: B) K$_{3}$N. ← 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