This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Acids > Class 7 Science Chapter 4 Acids – Quiz 16 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 16 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. Compounds form when ..... A) Molecules of one element are mixed together. B) Atoms of one element bond together. C) Molecules of two or more elements are mixed together. D) Atoms of two or more elements bond together. Show Answer Correct Answer: D) Atoms of two or more elements bond together. 3. The name of the gas produced when acid react with carbonates. A) Hydrogen. B) Oxygen. C) Nitrogen. D) Carbon dioxide. Show Answer Correct Answer: D) Carbon dioxide. 4. Who proposed a theory on acids? A) Alexander fleming. B) Arrhenius. C) John dalton. D) J.J. Thomson. Show Answer Correct Answer: B) Arrhenius. 5. Strong acids are highly A) Corrosive. B) Weak. C) Slippery. D) Sour. Show Answer Correct Answer: A) Corrosive. 6. Hydrochloric (HCl) is a A) Weak Acid. B) Weak Base. C) Strong base. D) Strong Acid. Show Answer Correct Answer: D) Strong Acid. 7. Which amino acid lacks the free amino group A) Isoleucine. B) Threonine. C) Valine. D) Proline. Show Answer Correct Answer: D) Proline. 8. The strongest bases have pH values close to A) 5. B) 7. C) 14. D) 0. Show Answer Correct Answer: C) 14. 9. 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. 10. An acid has a pH A) 7. B) Lower than 7. C) Higher than 7. D) Greater than 14. Show Answer Correct Answer: B) Lower than 7. 11. Which pH level indicates a strong alkali? A) 4-6. B) 8-11. C) 12-14. D) 1-3. Show Answer Correct Answer: C) 12-14. 12. A wasp sting is alkaline (pH 9). What could be used to treat a wasp sting??? A) Neutral. B) Salt. C) Acidic. D) Basic. Show Answer Correct Answer: C) Acidic. 13. Which pH value indicates the most basic solution? A) 3. B) 8. C) 11. D) 7. Show Answer Correct Answer: C) 11. 14. The molecular formula of pentanoic acid is A) C$_{5}$H$_{9}$O$_{2 }$. B) C$_{5}$H$_{10}$O$_{2}$. C) C$_{5}$H$_{11}$O$_{2}$. D) C$_{5}$H$_{12}$O$_{2}$. Show Answer Correct Answer: B) C$_{5}$H$_{10}$O$_{2}$. 15. Ethanol reacts with ethanoic acid to form ethyl ethanoate.C$_{2}$H$_{5}$OH + CH$_{3}$COOH $\rightarrow$ CH$_{3}$COOC$_{2}$H$_{5}$ + H$_{2}$OWhat is the formula of the ester formed when methanol reacts with butanoic acid, (C$_{3}$H$_{7}$COOH)? A) CH$_{3}$COOC$_{3}$H$_{7}$. B) C$_{3}$H$_{7}$COOCH$_{3}$. C) C$_{2}$H$_{5}$COOC$_{2}$H$_{5}$. D) C$_{3}$H$_{7}$COOC$_{2}$H$_{5}$. Show Answer Correct Answer: B) C$_{3}$H$_{7}$COOCH$_{3}$. 16. What prefix is used to name binary acids? A) Hydro-. B) Hypo-. C) Bi-. D) Per-. Show Answer Correct Answer: A) Hydro-. 17. BASE + ACID $\rightarrow$ SALT +? A) Oxygen. B) Water. C) Hydrogen ion. D) Hydroxide ion. Show Answer Correct Answer: B) Water. 18. Which base is called lime water A) Sodium hydroxide. B) Calcium hydroxide. C) Magnesium hydroxide. D) Ammonium hydroxide. Show Answer Correct Answer: B) Calcium hydroxide. 19. Which of the following acids are not stored in Metal Containers? A) Hydroflouric Acids. B) Hydrochloric Acids. C) Sulphuric Acids. D) All the Acids. Show Answer Correct Answer: D) All the Acids. 20. Which type of ion does a base produce when it is dissolved in water? A) Oxygen. B) Oxide. C) Hydroxide. D) Hydrogen. Show Answer Correct Answer: C) Hydroxide. 21. What is the pH of a neutral substance? A) 7. B) 5. C) 0. D) 10. Show Answer Correct Answer: A) 7. 22. What does a pH of 1 indicate about a liquid? A) It is a weak base. B) It is a weak acid. C) It is a very strong base. D) It is a strong acid. Show Answer Correct Answer: D) It is a strong acid. 23. Which property do bases have? A) Sour taste. B) React with metal. C) Slippery. D) None of the above. Show Answer Correct Answer: C) Slippery. 24. How is water formed in the Neutralization reaction? A) From the H$^{+}$ of acid and OH$^{-}$ of acid. B) From the H$^{+ }$ of base and OH$^{-}$ of acid. C) From the H$^{+}$ of acid and OH$^{-}$ of base. D) From the H$^{+}$ of base and OH$^{-}$ of base. Show Answer Correct Answer: C) From the H$^{+}$ of acid and OH$^{-}$ of base. 25. Universal indicator in a reaction of adequate amount of acid and base, A) Purple blue. B) Green. C) Orange. D) Red. Show Answer Correct Answer: B) Green. 26. A student tests an unknown aqueous solution and finds it conducts electricity and turns litmus paper red. What can the student infer? A) The solution contains an acid. B) The solution contains a base. C) The solutions is neutral. D) None of the above. Show Answer Correct Answer: A) The solution contains an acid. 27. A ..... is formed when an positive ion bonds with a negative ion. A) Acid. B) Base. C) Neutral ion. D) Salt. Show Answer Correct Answer: D) Salt. 28. A Lewis acid is defined a base as being an ..... A) An electron donor. B) An electron acceptor. C) A proton doner. D) A proton acceptor. Show Answer Correct Answer: A) An electron donor. 29. Which of the following is the word equation for the reaction between acids and carbonates? A) Base + acid $\rightarrow$ salt + water. B) Metal + acid $\rightarrow$ salt + hydrogen. C) Carbonate + acid $\rightarrow$ salt + water. D) Carbonate + acid $\rightarrow$salt+ carbon dioxide + hydrogen. Show Answer Correct Answer: D) Carbonate + acid $\rightarrow$salt+ carbon dioxide + hydrogen. 30. What would happen to red litmus paper when it encounters a base? A) It turns green. B) It stays red. C) It turns blue. D) It turns purple. Show Answer Correct Answer: C) It turns blue. 31. On adding acidified silver nitrate to a solution, a white precipitate was formed which turn grey when in sunlight. Which of the following compounds could have been present? A) NaI. B) FeCl $ _ {3} $. C) AgCl. D) NaCl. Show Answer Correct Answer: D) NaCl. 32. What pH is the strongest base? A) 14. B) 1. C) 4. D) 7. Show Answer Correct Answer: A) 14. 33. Releases hydrogen in an aqueous solution. A) Acid. B) Weak base. C) Base. D) Strong base. Show Answer Correct Answer: A) Acid. 34. What is the name of HBr? A) Hydrobromous acid. B) Hydrobromic acid. C) Bromic Acid. D) Bromous Acid. Show Answer Correct Answer: B) Hydrobromic acid. 35. Which of the following is also called slaked lime A) Ca [oh] $ _ {2} $. B) NaOH. C) KOH. D) NH$_{4}$OH. Show Answer Correct Answer: A) Ca [oh] $ _ {2} $. 36. Litmus paper can be used to determine the ..... of a substance A) Temperature. B) Relative pH. C) Relative volume. D) Chemical formula. Show Answer Correct Answer: B) Relative pH. 37. What is the pH of a solution that results from the complete neutralization of an HCl solution with a KOH solution? A) 7. B) 4. C) 10. D) 1. Show Answer Correct Answer: A) 7. 38. The reaction of metal with acid results in the formation of- A) Only hydrogen gas. B) Only salt. C) Both salt and hydrogen gas. D) None of these. Show Answer Correct Answer: C) Both salt and hydrogen gas. 39. Use the CODON CHART to answer the following question.CCG UUG ACC GCGWhat is the sequence of amino acids that will be translated from the mRNA above? A) Proline-phenylalanine-tyrosine-arginine. B) Proline-leucine-threonine-alanine. C) Proline-threonine-alanine-luecine. D) Arginine-Leucine-Treoinine-Alanine. Show Answer Correct Answer: B) Proline-leucine-threonine-alanine. 40. The value of rain water pH is less than ..... A) 5.6. B) 5.5. C) 1. D) 10. Show Answer Correct Answer: A) 5.6. 41. Which of the following gas will be formed when sodium hydrogencarbonate reacts with dilute hydrochloric acid? A) Carbon dioxide. B) Nitrogen. C) Oxygen. D) Hydrogen. Show Answer Correct Answer: A) Carbon dioxide. 42. Which compound has higher boiling point? A) Butanoic acid. B) 2-methylbutanoic acid. C) Pentanol. D) Pentanoic acid. E) Pentanal. Show Answer Correct Answer: D) Pentanoic acid. 43. A solution with a pH of 3.6 would be ..... A) Acid. B) Base. C) Neutral. D) Acid and Base. Show Answer Correct Answer: A) Acid. 44. Which of the following is formed as a result of neutralisation reaction? A) Salt. B) Acid. C) Metals. D) Base. Show Answer Correct Answer: A) Salt. 45. What are the products in a neutralization (Acids + Bases) reaction? A) H$_{2}$O + Salt. B) H$_{2}$ + Salt. C) OH$^{-}$ + Salt. D) H$_{3}$O$^{+}$ + Salt. Show Answer Correct Answer: A) H$_{2}$O + Salt. 46. The alkali tastes ..... . A) Bitter. B) Sweet. C) Wag. D) As sour. Show Answer Correct Answer: A) Bitter. 47. Which of the following is a Bronsted-Lowry Conjugate acid-base pair. A) HCl and NaOH. B) H$_{3}$O$^{+}$ and OH$^{-}$. C) H$_{2}$SO$_{4}$ and HSO$_{4}$$^{-}$. D) H$_{2}$S and S$^{2-}$. Show Answer Correct Answer: C) H$_{2}$SO$_{4}$ and HSO$_{4}$$^{-}$. 48. To delay the curdling of milk, which of the following base is added to it A) Potassium hydroxide. B) Baking soda. C) Citric Acid. D) Sodium hydroxide. Show Answer Correct Answer: B) Baking soda. 49. An example of acid obtained from mineral is A) Acetic acid. B) Tartaric acid. C) Nitric acid. D) Oxalic acid. Show Answer Correct Answer: C) Nitric acid. 50. What is the pOH of a solution that has a pH of 2? A) 12. B) 14. C) 1. D) 10. Show Answer Correct Answer: A) 12. 51. At what location on the pH scale can you find acids? A) Number 7 on the pH scale is acidic. B) Below 7. C) Above 7. D) You can find acids all throughout the scale. Show Answer Correct Answer: B) Below 7. 52. ..... indicators are substances which have diferent odours in acids and bases A) Organic. B) Olfactory. C) Inorganic. D) Universal. Show Answer Correct Answer: B) Olfactory. 53. Paheli Is suffering from indigestion due to acidity. In this situation, she is advisable to take: A) Milk. B) Lemon juice. C) Milk of magnesia. D) Curd. Show Answer Correct Answer: C) Milk of magnesia. 54. When a drop of vinegar solution is put on the blue litmus paper, it turns A) Yellow. B) Purple. C) Orange. D) Red. Show Answer Correct Answer: D) Red. 55. Products of a neutralization reaction are always: A) An acid and a base. B) An acid and a salt. C) A salt and water. D) A salt and a base. Show Answer Correct Answer: C) A salt and water. 56. ..... acid is present in curd A) Oleic. B) Acetic. C) Citric. D) Lactic. Show Answer Correct Answer: D) Lactic. 57. When more water is added to acid its hydrogen ion concentration increases A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 58. What is the function of ATP in living things? A) Provides energy for cells. B) Stores genetic information. C) Provides structure in the nucleus. D) None of the above. Show Answer Correct Answer: A) Provides energy for cells. 59. What is a mixture of chemicals that react with a base/acid to keep pH in a particular range? A) Catalyst. B) Buffer. C) Enzyme. D) Water. Show Answer Correct Answer: B) Buffer. 60. . What is a property of bases? A) Ability to dissolve metal. B) Sour taste. C) Slippery touch. D) Ability to form hydronium ions. Show Answer Correct Answer: C) Slippery touch. ← PreviousNext →Related QuizzesScience QuizzesClass 7 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books