This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 2 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of these is true about RNA? A) Has a double helix. B) Has a single helix. C) Contains thymine. D) None of the above. Show Answer Correct Answer: B) Has a single helix. 2. Which of the following particles is in the smallest amount in a dilute aqueous solution of ethanoic acid? A) CH$_{3}$COOH. B) OH$^{-}$. C) H$^{+}$. D) CH$_{3}$COO$^{-}$. Show Answer Correct Answer: B) OH$^{-}$. 3. Ranging from 0 to 14, a pH value indicates how acidic or basic a solution is. Which of these pH values would be a strong acid? A) 2. B) 6. C) 9. D) 13. Show Answer Correct Answer: A) 2. 4. H$_{2}$SO$_{4}$ A) Sulfuric acid. B) Hydrosulfuric acid. C) Sulfurous acid. D) Hydrosulfurous acid. Show Answer Correct Answer: A) Sulfuric acid. 5. Tomato contains ..... acid A) Citric acid. B) Oxalic acid. C) Tartaric acid. D) Malic acid. Show Answer Correct Answer: B) Oxalic acid. 6. Methyl orange is an ..... A) Acid. B) Indicator. C) Base. D) None of the above. Show Answer Correct Answer: B) Indicator. 7. When added to water what releases hydrogen ions? A) Isotopes. B) Acid. C) Transition Metals. D) Noble Gas. Show Answer Correct Answer: B) Acid. 8. ATCAGTGAT A codon is a sequence of three nucleotides that code for an amino acid. If the DNA sequence shown here goes through transcription and translation, how many amino acids will result from this sequence? A) 5. B) 4. C) 2. D) 3. Show Answer Correct Answer: D) 3. 9. What kind of bond holds the two strands of DNA together? A) Hydrogen bonds. B) Ionic bonds. C) Polar bonds. D) Covalent bonds. Show Answer Correct Answer: A) Hydrogen bonds. 10. What is the pH of distilled water? A) PH 12. B) PH 3. C) PH 8. D) PH 7. Show Answer Correct Answer: D) PH 7. 11. When using the Arrhenius model, what types of ions indicate that a compound is an acid? A) H$^{+}$. B) OH$^{-1}$. C) All the above. D) None of the above. Show Answer Correct Answer: A) H$^{+}$. 12. What is the name for this acid H$_{2}$SO$_{4}$ A) Hydrochloric acid. B) Phosphorus acid. C) Sulfuric acid. D) Nitric acid. Show Answer Correct Answer: C) Sulfuric acid. 13. What happens when acid and base react? A) An explosion results. B) They get neutralized. C) Only water is formed. D) Acid gets diluted. Show Answer Correct Answer: B) They get neutralized. 14. Is the following compound an acid or a base?HI A) Acid. B) Base. C) All the above. D) None of the above. Show Answer Correct Answer: A) Acid. 15. A pH of 3 is how many times more acidic than a pH of 5? A) 2. B) 20. C) 10. D) 100. Show Answer Correct Answer: D) 100. 16. Tastes Sour A) Acids. B) Bases. C) Salts. D) All. Show Answer Correct Answer: A) Acids. 17. Acids produce ..... in an aqueous solution? A) Hydrogen ions (H+). B) Acid molecules. C) Water particles. D) Hydroxide ions. Show Answer Correct Answer: A) Hydrogen ions (H+). 18. What is the chemical symbol for Nitric Acid A) H3NO. B) Hay. C) Hay. D) HNI3. Show Answer Correct Answer: D) HNI3. 19. Which of the following pH numbers indicates a strong acid? A) 1. B) 5. C) 7. D) 14. Show Answer Correct Answer: A) 1. 20. Bleach and oven cleaner are: A) Strong acids. B) Weak acids. C) Strong bases. D) Weak bases. Show Answer Correct Answer: C) Strong bases. 21. NaOH A) Sodium oxide. B) Sodium hydrogen. C) Sodium hydroxide. D) None of the above. Show Answer Correct Answer: C) Sodium hydroxide. 22. This acid is used in car batteries and is also called 'Oil of Vitriol'. A) Carbonic acid. B) Sulphuric acid. C) Nitric acid. D) Phosphoric acid. Show Answer Correct Answer: B) Sulphuric acid. 23. Which of the following is not a base? A) Washing soda. B) Caustic soda. C) Caustic potash. D) Lemon juice. Show Answer Correct Answer: D) Lemon juice. 24. Bleaching powder is soluble in cold water giving a milky solution due to- A) Available chlorine. B) Lime present in it. C) Calcium carbonate formation. D) The absorption of carbon dioxide from atmosphere. Show Answer Correct Answer: B) Lime present in it. 25. Which of the following is not an olfactory indicator A) Clove. B) Litmus. C) Vanilla. D) Onion. Show Answer Correct Answer: B) Litmus. ← PreviousNext →Related QuizzesClass 7 Science Chapter 4 Acids Quiz 1Class 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 10Class 7 Science Chapter 4 Acids Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books