This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 34 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 34 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Four substances were tested for pH, lemon juice (pH 2), baking soda (pH 9), bleach (pH 12), and milk (pH 6). Which of the following correctly lists the substances from most basic to acidic? A) Lemon juice, milk, baking soda, bleach. B) Bleach, baking soda, milk, lemon juice. C) Milk, lemon juice, baking soda, bleach. D) Baking soda, bleach, lemon juice, milk. Show Answer Correct Answer: B) Bleach, baking soda, milk, lemon juice. 2. Propanamine (CH$_{3}$CH$_{2}$CH$_{2}$NH$_{2}$) is a A) Weak Acid. B) Weak Base. C) Strong Acid. D) Strong base. Show Answer Correct Answer: B) Weak Base. 3. Carbonic acid present in A) Egg. B) Cool drinks. C) Minerals. D) Milk. Show Answer Correct Answer: B) Cool drinks. 4. Which reactants are used to produce sodium chloride (salt and water) A) Sodium hydroxide and nitric acid. B) Sodium hydroxide and sulfuric acid. C) Sodium hydroxide and phosphoric acid. D) Sodium hydroxide and hydrochloric acid. Show Answer Correct Answer: D) Sodium hydroxide and hydrochloric acid. 5. The products of a neutralisation reaction are lithium sulfate and water. What is the name of the acid used to neutralise the alkali lithium hydroxide? A) Hydrochloric acid. B) Sulfuric acid. C) Nitric acid. D) Phosphoric acid. Show Answer Correct Answer: B) Sulfuric acid. 6. Is sodium hydroxide is used in the manufacture of soaps and detergents A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. Can acids corrode? A) Yes. B) No. C) Maybe. D) You don't know. Show Answer Correct Answer: A) Yes. 8. Ammonia is ..... A) Base. B) Acid. C) Neutral solution. D) Indicator. Show Answer Correct Answer: A) Base. 9. What causes shiny pennies to become dull? A) They turn dull because they get dirty. B) They turn dull when exposed to air over time (Oxidation). C) They turn dull because they are just old. D) They are dull to begin with. Show Answer Correct Answer: B) They turn dull when exposed to air over time (Oxidation). 10. What is the name of this compound:N$_{2}$O$_{5}$ A) Nitrogen Oxide. B) Dinitrogen Pentoxide. C) Nitrate pentaoxide. D) Dinitrate pentaoxide. Show Answer Correct Answer: B) Dinitrogen Pentoxide. 11. A tripeptide has A) 3 amino acids and 1 peptide bond. B) 3 amino acids and 2 peptide bonds. C) 3 amino acids and 3 peptide bonds. D) 3 amino acids and 4 peptide bonds. Show Answer Correct Answer: B) 3 amino acids and 2 peptide bonds. 12. On adding acidified silver nitrate to a solution, a white precipitate was formed which went purple when in sunlight. Which of the following compounds could have been present? A) MgBr$_{2}$. B) NaI. C) NaCl. D) Faith (no $ _ {3} $) $ _ {2} $. Show Answer Correct Answer: C) NaCl. 13. 1 M sodium hydroxide solution has a higher electrical conductivity than that of 1 M ammonia solution. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 14. Nitrogen bases for RNA: A) Adenine, Guanine, Cytosine, and Uracil. B) Adenine Guanine, Cytosine, and Sulfur. C) Adenine, Guanine, Cytosine, and Thymine. D) Adenine, Guanine, Cytosine, and Phosphate. Show Answer Correct Answer: A) Adenine, Guanine, Cytosine, and Uracil. 15. A pH scale is ..... A) A corrosive substance that says a substance is an acid. B) An indicator that tells if a substance is an acid or base. C) A blue litmus paper. D) A red litmus paper. Show Answer Correct Answer: B) An indicator that tells if a substance is an acid or base. 16. What can be explained by the Arrhenius theory? A) The behavior of many acids and bases. B) The effect of stress on phase equilibrium. C) The operation of an electrochemical cell. D) The spontaneous decay of some nuclei. Show Answer Correct Answer: A) The behavior of many acids and bases. 17. CH$_{3}$COOH A) Acetic acid. B) Acetous acid. C) Hydroacetic acid. D) Hydroacetous acid. Show Answer Correct Answer: A) Acetic acid. 18. All hydrophobic aminoacids (valine, leucine, isoleucine etc) share which of the following properties? A) Polar uncharged R-groups. B) Non-polar uncharged R-groups. C) All the above. D) None of the above. Show Answer Correct Answer: B) Non-polar uncharged R-groups. 19. In DNA, adenine bonds with ..... A) Thymine. B) Adenine. C) Cytosine. D) Guanine. Show Answer Correct Answer: A) Thymine. 20. Which of the following is used to prepare detergents? A) Slaked lime. B) Baking soda. C) Milk of magnesia. D) Sulphuric acid. Show Answer Correct Answer: D) Sulphuric acid. 21. What colour does litmus paper turn when added to an alkali? A) Blue. B) Red. C) Green. D) Colourless. Show Answer Correct Answer: A) Blue. 22. Acids turn blue litmus ..... A) Black. B) Red. C) Green. D) None of the above. Show Answer Correct Answer: B) Red. 23. TOOTH DECAY IS CAUSED BY THE PRESENCE OF A BASE A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 24. What is the name for this acid HNO$_{2}$ A) Hydronitric acid. B) Nitrous acid. C) Nitric acid. D) Nitrate acid. Show Answer Correct Answer: B) Nitrous acid. 25. Pyrimidines: A) Double ringed structure. B) Single ringed structure. C) All the above. D) None of the above. Show Answer Correct Answer: B) Single ringed structure. ← 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