This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 16 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 16 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If one series of bases reads:TTGACTAGG, then the complementary set of bases would read: A) TTGACTAGG. B) AACTGATCC. C) AATCGAACTT. D) AAGTCATCC. Show Answer Correct Answer: B) AACTGATCC. 2. PH greater than 7. A) Acids. B) Bases. C) All. D) None of the above. Show Answer Correct Answer: B) Bases. 3. An acid reacted with an alkali to form a salt and water. Which of these are the reactants? A) Acid and alkali. B) Acid and salt. C) Alkali and water. D) Salt and wate. Show Answer Correct Answer: A) Acid and alkali. 4. Chlorous acid A) HCLO $ _ {3} $. B) Hclo $ _ {2} $. C) HCLO. D) HCl. Show Answer Correct Answer: B) Hclo $ _ {2} $. 5. What are the monomers for Nucleic Acids? A) Monosaccarides. B) Amino Acids. C) Nucleotides. D) Nitrogen Acids. Show Answer Correct Answer: C) Nucleotides. 6. Solutions that have more OH-ions than H+ ions are A) Acids. B) Bases. C) Enzymes. D) Neutral. Show Answer Correct Answer: B) Bases. 7. Which of the following is a basic solution? A) Household ammonia. B) HCl dissolved in water. C) Vinegar. D) Pure water. Show Answer Correct Answer: A) Household ammonia. 8. Which is most acidic? A) Baking Soda. B) Lemon Juice. C) Black Coffee. D) Milk. Show Answer Correct Answer: B) Lemon Juice. 9. DNA contains the sugar ..... A) Dexoxyribose. B) Fructose. C) Within limits. D) Sucrose. Show Answer Correct Answer: A) Dexoxyribose. 10. Which of the following set of substances contain acids? A) Curd, vinegar. B) Curd, milk of magnesia. C) Vinegar, soap. D) Grapes, lime water. Show Answer Correct Answer: A) Curd, vinegar. 11. What is the sequence of amino acids that will be translated from the mRNA below?5' UGC GAU ACG GAA 3' A) Tryptophan-Aspartic Acid-Threonine-Glutamic Acid. B) Cysteine-Glutamic Acid-Threonine-Glutamic Acid. C) Tryptophan-Glutamic Acid-Threonine-Aspartic Acid. D) Cysteine-Aspartic Acid-Threonine-Glutamic Acid. Show Answer Correct Answer: D) Cysteine-Aspartic Acid-Threonine-Glutamic Acid. 12. What does the pH scale measure? A) The concentration of acids and bases. B) The malleability of a metal. C) The temperature of the water in a swimming pool. D) The amount of phosphorus in a compound. Show Answer Correct Answer: A) The concentration of acids and bases. 13. Products of a neutralisation reaction are always A) An acid and a base. B) An acid and a salt. C) Salt and water. D) Salt and base. Show Answer Correct Answer: C) Salt and water. 14. Select the correct pair of words that fits into this sentence ..... are corrosive substances characterized as having a strong smell, a sour taste, and a ..... A) Bases; pH less than 7. B) Acids; pH greater than 7. C) Bases; pH greater than 7. D) Acids; pH less than 7. Show Answer Correct Answer: D) Acids; pH less than 7. 15. What methods can you use to measure the pH of a solution? A) Observing color or clarity. B) Measuring mass or volume. C) Measuring density or electrical conductivity. D) Using acid base-indicators or pH meters. Show Answer Correct Answer: D) Using acid base-indicators or pH meters. 16. Name the acid with the formula, H$_{2}$SeO$_{4}$? A) Selenate acid. B) Selenite acid. C) Selenic acid. D) Selenous acid. Show Answer Correct Answer: C) Selenic acid. 17. How does base tastes A) Sour. B) Salty. C) Bitter. D) Sweet. Show Answer Correct Answer: C) Bitter. 18. In which scenario given could a weak acid have a lower pH than a strong acid? A) A significantly diluted weak acid is compared to a highly concentrated strong acid. B) A significantly diluted strong acid is compared to a highly concentrated weak acid. C) A significantly diluted weak acid is compared to a significantly diluted strong acid. D) A highly concentrated weak acid is compared to a highly concentrated strong acid. Show Answer Correct Answer: B) A significantly diluted strong acid is compared to a highly concentrated weak acid. 19. Sulfuric (H$_{2}$SO$_{4}$) is a A) Weak Acid. B) Weak Base. C) Strong Acid. D) Strong base. Show Answer Correct Answer: C) Strong Acid. 20. Which of the following is a weak acid?(a) Hydrochloric Acid(b) Nitric Acid(c) Acetic Acid(d) Sulphuric Acid A) A. B) B. C) C. D) D. Show Answer Correct Answer: C) C. 21. When acids react with metals, they produce hydrogen gas and salt. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 22. Which of the following is the weakest base? A) Oven cleaner-13.5. B) Lemon juice-2.5. C) Soap-10. D) Blood-7.4. Show Answer Correct Answer: D) Blood-7.4. 23. Forms hydronium ions in water. A) Acids. B) Bases. C) All. D) None of the above. Show Answer Correct Answer: A) Acids. 24. Which of the following substances would be most basic? A) PH = 2. B) PH = 7. C) PH = 9. D) PH = 10. Show Answer Correct Answer: D) PH = 10. 25. Hydrophobic amino acid side chains are A) Forced to go to outside of protein. B) Electrically negative. C) Electrically positive. D) Electrically neutral and nonpolar. Show Answer Correct Answer: D) Electrically neutral and nonpolar. ← 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