This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 35 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 35 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Cystine is the combination of A) Cystine-methionine. B) Methionine-serine. C) Cysteine-cysteine. D) None of the above. Show Answer Correct Answer: C) Cysteine-cysteine. 2. Are bee stinks acids or alkalis? A) Acids. B) Alkalis. C) All the above. D) None of the above. Show Answer Correct Answer: A) Acids. 3. As the number of hydrogen ions (H$^{+}$) decreases, the pH ..... A) Increases. B) Decreases. C) Stays the same. D) None of the above. Show Answer Correct Answer: A) Increases. 4. If you wanted to test a colourless and odourless substance at home, what household item could you use? A) Red cabbage water. B) Bleach. C) Water. D) Vinegar. Show Answer Correct Answer: A) Red cabbage water. 5. Name the acid:HC$_{2}$H$_{3}$O$_{2}$ A) Acetic Acid. B) Acetous Acid. C) Hydrogen Acetate. D) Hydrogen Dicarbon Trihydrogen Dioxygen. Show Answer Correct Answer: A) Acetic Acid. 6. When naming binary acids, the ending always changes to: A) -ate. B) -ite. C) -ic. D) -ous. Show Answer Correct Answer: C) -ic. 7. What is the role of enzymes? A) Copy DNA. B) Catalyze Reactions. C) Transport Molecules. D) Makes RNA. Show Answer Correct Answer: B) Catalyze Reactions. 8. Name this acid. HNO$_{2}$ A) Nitrous acid. B) Nitric acid. C) Hydronitric acid. D) Hydrogen nitrogen oxide. Show Answer Correct Answer: A) Nitrous acid. 9. Which of the following acids is a strong acid? A) 1 M CH$_{3}$COOH(aq). B) 12 M CH$_{3}$COOH(aq). C) 0.01 M HCl(aq). D) 0.5 M CH$_{3}$COOH(aq). Show Answer Correct Answer: C) 0.01 M HCl(aq). 10. The difference between tertiary and quartenary structure is: A) Tertiary structure has double bond whereas quartenary structure does not have double bond. B) Tertiary structure consists of one polypeptide chain whereas quartenary structure consists of more than one polypeptide chains. C) Tertiary structure is fibrous whereas quartenary structure is globular. D) Tertiary structure is water-soluble whereas quartenary structure is lipid soluble. Show Answer Correct Answer: B) Tertiary structure consists of one polypeptide chain whereas quartenary structure consists of more than one polypeptide chains. 11. Neutral A) A pH of 7. B) A pH of 14. C) A Ph of 0. D) Beige. Show Answer Correct Answer: A) A pH of 7. 12. What are Nucleic Acids made up of? A) Carbon, Hydrogen, Oxygen, and Nitrogen. B) Carbon, Hydrogen, Oxygen, Nitrogen, and sometimes sulfur. C) Carbon Hydrogen, Oxygen, Nitrogen, and Phosphate. D) Carbon, Hydrogen, and Oxygen. Show Answer Correct Answer: C) Carbon Hydrogen, Oxygen, Nitrogen, and Phosphate. 13. What is the shape of DNA? A) Double Hyperbola. B) Paraolic. C) Double Helix. D) Linear. Show Answer Correct Answer: C) Double Helix. 14. Acids are ..... in taste A) Sour. B) Bitter. C) Sweet. D) Tasteless. Show Answer Correct Answer: A) Sour. 15. What is gastric acid present in the stomach composed of? A) Hydrochloric acid. B) Sulphuric acid. C) Nitric acid. D) Lactic acid. Show Answer Correct Answer: A) Hydrochloric acid. 16. Lime water is ..... in nature. A) Acidic. B) Basic. C) Neutral. D) Both acidic and basic. Show Answer Correct Answer: B) Basic. 17. The nature of vinegar is A) Acidic. B) Basic. C) Neutral. D) Salt. Show Answer Correct Answer: A) Acidic. 18. In oil hydrophobic nonpolar amino acids will A) Group together. B) Effectively dissolve. C) Move to the inside of the protein. D) Move to the outside of the protein. Show Answer Correct Answer: B) Effectively dissolve. 19. Water soluble alkali is called. A) Neutral. B) Alkali. C) Acid. D) Alkalient. Show Answer Correct Answer: D) Alkalient. 20. Sabrina applied calamine solution, when an ant bit her. This is an example of ..... A) Indication. B) Saltation Reaction. C) Neutralization Reaction. D) Antacidation Reaction. Show Answer Correct Answer: C) Neutralization Reaction. 21. Since some acids seemingly "eat away" certain substances, acids are ..... A) Bitter. B) Sliipery. C) Corrosive. D) Weak. Show Answer Correct Answer: C) Corrosive. 22. Williams collected a rain sample and measured its pH to be 5.6. What does this mean? A) The rain water is a weak base. B) The rain water is neutral. C) The rain water is a strong acid. D) The rain water is a weak acid. Show Answer Correct Answer: D) The rain water is a weak acid. 23. What anion is in phosphoric acid? A) $ _ {4} $$^{-3} $. B) $ _ {3} $$^{-3} $. C) P$^{-3}$. D) H$^{+}$. Show Answer Correct Answer: A) $ _ {4} $$^{-3} $. 24. Gypsum Technical Formula ..... A) Case $ _ {4} $ 2 h $ _ {2} $ o. B) Case $ _ {4} $ 1/2 h $ _ {2} $ o. C) Case $ _ {4} $ 5 h $ _ {2} $ o. D) Case $ _ {4} $ h $ _ {2} $ o. Show Answer Correct Answer: A) Case $ _ {4} $ 2 h $ _ {2} $ o. 25. What is the chemical formula of sulphuric acid? A) SO4. B) H2SO4. C) So. D) H24S. Show Answer Correct Answer: B) H2SO4. ← 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