This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Salts – Quiz 19 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Salts Quiz 19 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In a ..... reaction, an acid and an alkali produce a salt and a water. A) Concentrated. B) Decomposition. C) Dilute. D) Neutralization. Show Answer Correct Answer: D) Neutralization. 2. What is the chemical formulae for Sulfuric acid? A) H$_{2}$SO$_{4}$. B) HNO$_{3}$. C) HCl. D) None of the above. Show Answer Correct Answer: A) H$_{2}$SO$_{4}$. 3. State whether the following compound is soluble or insoluble. Magnesium nitrate, Mg(NO$_{3}$)$_{2}$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble. 4. Ant sting has? A) Tartaric acid. B) Methanoic acid. C) Citric acid. D) Acetic acid. Show Answer Correct Answer: B) Methanoic acid. 5. Which of the following can be prepared with neutralization by using metal and acid? Which of the following salts can be provided through neutralization between metal and acid? A) Copper (II) sulphate / Kuprum (II) sulfat. B) Silver nitrate / Argentum nitrat. C) Sodium Iodide / sodium Iodida. D) Magnesium sulphate / Magnesium sulfat. Show Answer Correct Answer: D) Magnesium sulphate / Magnesium sulfat. 6. Which solution can turn phenolphthalein pink? A) Sodium hydroxide. B) Vinegar. C) Tomato. D) Hydrochloric acid. Show Answer Correct Answer: A) Sodium hydroxide. 7. ..... contain a mild base which neutralize the excess acid present in the stomach. A) Bases. B) Filters. C) Indicators. D) Antacids. Show Answer Correct Answer: D) Antacids. 8. Plaster of Paries hardens by- A) Giving off CO2. B) Changing into CaCO3. C) Combining with water. D) Giving out water. Show Answer Correct Answer: C) Combining with water. 9. Iron + Hydrochloric acid $\rightarrow$? A) Iron sulfate + water. B) Iron + hydrogen. C) Iron chloride + hydrogen. D) Iron chloride + water. Show Answer Correct Answer: C) Iron chloride + hydrogen. 10. Nancy wrote a secret message using soda water. Try to decode using a suitable indicator. A) Phenolphthalein. B) Turmeric. C) China rose. D) None of the above. Show Answer Correct Answer: C) China rose. 11. Both acids and bases change colour of all indicators. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 12. State whether the following compound is soluble or insoluble. Ammonium carbonate (NH$_{4}$)$_{2}$CO$_{3 }$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble. 13. Blue litmus paper turns ..... on adding acid. A) Remains the same. B) Purple. C) Red. D) Green. Show Answer Correct Answer: C) Red. 14. Curd, lemon juice, orange juice and vinegar taste sour because they contain ..... A) Neutral. B) Acids. C) Salts. D) Bases. Show Answer Correct Answer: B) Acids. 15. State whether the following compound is soluble or insoluble. Calcium hydroxide (limewater), Ca(OH)$_{2}$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: A) Soluble. 16. The salt solution below will change the color of the red litmus paper ..... A) Nabr. B) NH4Cl. C) CaCl2. D) CH3CONA. E) To. Show Answer Correct Answer: D) CH3CONA. 17. Name of acid present in CURD A) Formic acid. B) Lactic acid. C) Citric acid. D) Tartaric acid. Show Answer Correct Answer: B) Lactic acid. 18. Which one among the following is an Universal Indicator? A) PH. B) Litmus. C) Phenolphthalien. D) Vanilla Extract. Show Answer Correct Answer: A) PH. 19. Which of the following statements is true about all bases? A) Dissolve in water. B) Have alkaline properties. C) React with acids. D) Contain hydroxide ions. Show Answer Correct Answer: C) React with acids. 20. Which acid is known as the KING OF CHEMICALS? A) Sodium hydroxide. B) Sulphurous acid. C) Citric acid. D) Sulphuric acid. Show Answer Correct Answer: D) Sulphuric acid. 21. Which metal is the least reactive out of:copper, magnesium, zinc and iron? A) Copper. B) Magnesium. C) Zinc. D) Iron. Show Answer Correct Answer: A) Copper. 22. What is HCl? A) Hydrochloric Acid. B) Chlorine Hydroxide. C) Hydrogen Chloride. D) None of the above. Show Answer Correct Answer: A) Hydrochloric Acid. 23. Taste of acid is A) Bitter. B) Soupy. C) Sour. D) Sweet. Show Answer Correct Answer: C) Sour. 24. State whether the following compound is soluble or insoluble. Calcium carbonate CaCO$_{3 }$ A) Soluble. B) Insoluble. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insoluble. 25. What should you do to make Copper Sulphate crystals lose their blue colour? A) Dissolve it. B) Heat it. C) Powder it. D) Add acid to it. Show Answer Correct Answer: B) Heat it. ← 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