This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 39 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 39 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. This ion is responsible for the properties of bases A) Sodium ion. B) Hydrogen ion. C) Hydroxide ion. D) Oxide ion. Show Answer Correct Answer: C) Hydroxide ion. 2. Which property is not characteristic of a base? A) A It reacts with a carbonate to form carbon dioxide. B) B It reacts with an acid to form a salt. C) C It reacts with an ammonium salt to form ammonia. D) D It turns universal indicator paper blue. Show Answer Correct Answer: A) A It reacts with a carbonate to form carbon dioxide. 3. A compound that changes color when it is in contact with an acid or base is called ..... A) Acid. B) Base. C) Neutral. D) Indicator. Show Answer Correct Answer: D) Indicator. 4. Name the Acid:H$_{2}$S A) Sulfuric Acid. B) Sulfurous Acid. C) Hydrosulfuric Acid. D) Hydrosulfurous Acid. Show Answer Correct Answer: C) Hydrosulfuric Acid. 5. What is the range of pH scale? A) 0-14. B) 1-14. C) 1-6. D) 12-14. Show Answer Correct Answer: A) 0-14. 6. Which of the following chemical formulas is NOT an acid? A) HBr. B) HF. C) HCl. D) Any otheruce. Show Answer Correct Answer: D) Any otheruce. 7. Is this a neutralization reaction?NaOH + HCL $\rightarrow$ A) YES. B) NO. C) All the above. D) None of the above. Show Answer Correct Answer: A) YES. 8. What colour does litmus paper turn when added to an acid? A) Blue. B) Red. C) Green. D) Colourless. Show Answer Correct Answer: B) Red. 9. Neutral solutions have a pH of: A) 0. B) 1. C) 7. D) 14. Show Answer Correct Answer: C) 7. 10. A wasp sting has a pH of 10. You can treat a wasp sting with A) Water. B) Toothpaste. C) Vinegar. D) Sodium hydroxide. Show Answer Correct Answer: C) Vinegar. 11. The process of using DNA to make copies of RNA is known as- A) Respiration. B) Transcription. C) Photosynthesis. D) Translation. Show Answer Correct Answer: B) Transcription. 12. Plaster of Paris is obtained by heating gypsum at 373$^{0}$C A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 13. What does pH stand for? A) Percent of hydrogen. B) Power of Hydrogen. C) Phenolphthalein. D) Phosphorus:Hydrogen ratio. Show Answer Correct Answer: A) Percent of hydrogen. 14. Magnesium metal is a gas caused by action between hydrochloric acids A) Oxygen. B) Hydrogen. C) Carbon Dioxide. D) Chlorine. Show Answer Correct Answer: B) Hydrogen. 15. Hydroiodic acid has the formula A) H$_{2}$I$_{2}$. B) H$_{1}$I$_{1}$. C) HI. D) None of the above. Show Answer Correct Answer: C) HI. 16. Compounds form when ..... A) Atoms of one element bond together. B) Atoms of two or more elements bond together. C) Molecules of one element are mixed together. D) Molecules of two or more elements are mixed together. Show Answer Correct Answer: B) Atoms of two or more elements bond together. 17. The name of the gas produced when acid react with carbonates. A) Oxygen. B) Carbon dioxide. C) Nitrogen. D) Hydrogen. Show Answer Correct Answer: B) Carbon dioxide. 18. Who proposed a theory on acids? A) Alexander fleming. B) Arrhenius. C) John dalton. D) J.J. Thomson. Show Answer Correct Answer: B) Arrhenius. 19. Strong acids are highly A) Weak. B) Slippery. C) Sour. D) Corrosive. Show Answer Correct Answer: D) Corrosive. 20. Hydrochloric (HCl) is a A) Weak Acid. B) Weak Base. C) Strong Acid. D) Strong base. Show Answer Correct Answer: C) Strong Acid. 21. Which amino acid lacks the free amino group A) Threonine. B) Valine. C) Isoleucine. D) Proline. Show Answer Correct Answer: D) Proline. 22. The strongest bases have pH values close to A) 0. B) 14. C) 7. D) 5. Show Answer Correct Answer: B) 14. 23. Acids react with carbonates to form A) Salt and Water. B) Salt and Carbondioxide. C) Water and Carbondioxide. D) Salt, Water and Carbondioxide. Show Answer Correct Answer: D) Salt, Water and Carbondioxide. 24. An acid has a pH A) Higher than 7. B) Lower than 7. C) 7. D) Greater than 14. Show Answer Correct Answer: B) Lower than 7. 25. Which pH level indicates a strong alkali? A) 1-3. B) 4-6. C) 8-11. D) 12-14. Show Answer Correct Answer: D) 12-14. ← PreviousNext →Related QuizzesClass 7 Science Chapter 4 Acids Quiz 1Class 7 Science Chapter 4 Acids Quiz 2Class 7 Science Chapter 4 Acids Quiz 3Class 7 Science Chapter 4 Acids Quiz 4Class 7 Science Chapter 4 Acids Quiz 5Class 7 Science Chapter 4 Acids Quiz 6Class 7 Science Chapter 4 Acids Quiz 7Class 7 Science Chapter 4 Acids Quiz 8Class 7 Science Chapter 4 Acids Quiz 9Class 7 Science Chapter 4 Acids Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books