This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Acids > Class 7 Science Chapter 4 Acids – Quiz 10 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 10 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which substance is acting as a bronsted-Lowry base the reaction below?HF + NH$^{3 }$$\rightarrow$ NH$^{4}$+ + F A) HF. B) NH$_{3}$. C) NH$_{4}$$^{+}$. D) None of the above. Show Answer Correct Answer: B) NH$_{3}$. 2. ..... is/are used to build and repair muscle. A) Fat. B) Fiber. C) Protein. D) Carbohydrates. Show Answer Correct Answer: C) Protein. 3. The substance being dissolved in a solution. A) Solute. B) Mixture. C) Solvent. D) Solution. Show Answer Correct Answer: A) Solute. 4. The anion part in HNO$_{2}$ is A) Nitrite ion. B) Nitric ion. C) Nitrate ion. D) Nitrogen ion. Show Answer Correct Answer: A) Nitrite ion. 5. Boiling points of carboxylic acids is higher than those of corresponding alcohols.Is the above statement True or False? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 6. Nitric (HNO$_{3}$) is a A) Weak Acid. B) Strong Acid. C) Strong base. D) Weak Base. Show Answer Correct Answer: B) Strong Acid. 7. Which of the following is a weak base? A) Potassium hydroxide (KOH). B) Calcium hydroxide (Ca(OH)2). C) Sodium hydroxide (NaOH). D) Ammonia (NH3). Show Answer Correct Answer: D) Ammonia (NH3). 8. How many times a day must ATP be recycled to power a human body? A) 500-1000 times a day. B) 1000-2000 times a day. C) 1-2 times a day. D) 2000-3000 times a day. Show Answer Correct Answer: D) 2000-3000 times a day. 9. Which chemical is used to neutralise formic acid? A) Ammonium hydroxide. B) Sodium hydroxide. C) Calcium hydroxide. D) Calcium chloride. Show Answer Correct Answer: C) Calcium hydroxide. 10. Which of the following is NOT a nitrogen base found in DNA? A) Guanine. B) Uracil. C) Adenine. D) Thymine. Show Answer Correct Answer: B) Uracil. 11. 12 M ammonia solution is a stronger alkali than 1 M sodium hydroxide solution. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 12. Acid-base conjugate pairs differ by a single A) Proton. B) Neutron. C) Oxygen. D) Electron. Show Answer Correct Answer: A) Proton. 13. NaOH $\rightarrow$ Na$^{+}$ + OH$^{-}$In the equation above, NaOH acts as a(n) ..... A) Arrhenius acid. B) Bronsted-Lowry base. C) Arrhenius base. D) Bronsted-Lowry acid. Show Answer Correct Answer: C) Arrhenius base. 14. Are wasp stinks alkalis or acids? A) Acid. B) Alkalis. C) All the above. D) None of the above. Show Answer Correct Answer: B) Alkalis. 15. When the pH Scale is on 7, the Nature of the substance is- A) Acidic. B) Basic. C) Soluble. D) None of the Above. Show Answer Correct Answer: D) None of the Above. 16. The pH scale measures the concentration of hydroxide ions in a solution. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 17. What kinds of food can you get protein from in your diet? A) Eggs. B) Meat and Fish. C) Nuts and Legumes. D) All of the above. Show Answer Correct Answer: D) All of the above. 18. Strong acids and bases ..... A) Do not break apart into ions (non-electrolyte). B) Partially break apart into ions (weak electrolyte). C) Completely break apart into ions (non-electrolyte). D) Completely break apart into ions (strong electrolyte). Show Answer Correct Answer: D) Completely break apart into ions (strong electrolyte). 19. The alchemists claimed that ordinary metals can be transformed into gold. Is this claim true? Why or Why not? A) This claim is true. Where is gold coming from, if not from alchemists?. B) This claim is not true. Metals can be coated with other metals; not transformed. C) This claim is true! My steel nail is now gold. D) This claim is not true. No explanation necessary. Show Answer Correct Answer: B) This claim is not true. Metals can be coated with other metals; not transformed. 20. Which of the following is a natural indicator? A) China rose petal. B) Turmeric. C) Litmus. D) All of these. Show Answer Correct Answer: D) All of these. 21. What would be considered the weakest base? A) 14. B) 7. C) 11. D) 8. Show Answer Correct Answer: D) 8. 22. Rainwater is an acid. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 23. An element common to all acids isa) Chlorine (b) Nitrogen (c) Oxygen (d) Hydrogen A) A. B) C. C) D. D) B. Show Answer Correct Answer: C) D. 24. Indigestion occurs when A) Stomach acid has reacted with carbonates to form carbon dioxide. B) Stomach acid rises into the oesophagus, causing burns, because it is corrosive. C) There is not enough stomach acid to digest food sufficiently. D) The pH in the stomach is too high, so the stomach lining is damaged. Show Answer Correct Answer: B) Stomach acid rises into the oesophagus, causing burns, because it is corrosive. 25. Which item is an acid? A) Drain cleaner. B) Ammonia. C) An orange. D) None of the above. Show Answer Correct Answer: C) An orange. 26. Blue litmus paper is dipped in a solution but it remains blue. What could the nature of the solution be? A) Acidic. B) Basic. C) Neutral. D) Either (b) and (c). Show Answer Correct Answer: D) Either (b) and (c). 27. If we touch a piece of ice ..... A) Heavenly emanates into our body from ice. B) Does not emit heat. C) Cannot say. D) Heaven radiates from our body to a piece of ice. Show Answer Correct Answer: D) Heaven radiates from our body to a piece of ice. 28. The central carbon of an amino acid is called? A) Beta carbon. B) Chiral carbon. C) Asymmetric carbon. D) Alpha carbon. Show Answer Correct Answer: D) Alpha carbon. 29. Apple contains ..... acid A) Acetic acid. B) Malic acid. C) Citric acid. D) Oxalic acid. Show Answer Correct Answer: B) Malic acid. 30. These can burn you if they are strong enough. A) Bases. B) Acids. C) Acids & Bases. D) Water. Show Answer Correct Answer: C) Acids & Bases. 31. Turmeric paper is a natural ..... A) Base. B) Acid. C) Salt. D) Indicator. Show Answer Correct Answer: D) Indicator. 32. A solution changes the colour of turmeric indicator from yellow to red. The solution is- A) Neutral. B) Basic. C) Acidic. D) Either neutral or acidic. Show Answer Correct Answer: B) Basic. 33. It is used by doctors in the bandage that is to re-past the broken bones in our body. A) Washing soda. B) Gypsum. C) Water. D) Plaster of Paris. Show Answer Correct Answer: D) Plaster of Paris. 34. Colourless odourless gas evolved when HCl reacts with zinc A) Hydrogen. B) Argon. C) Nitrogen. D) Oxygen. Show Answer Correct Answer: A) Hydrogen. 35. Acid + Base=? + Water A) Food. B) Sugar. C) Indicator. D) Salt. Show Answer Correct Answer: D) Salt. 36. Hydrofluoric (HF) is a A) Strong base. B) Weak Base. C) Weak Acid. D) Strong Acid. Show Answer Correct Answer: C) Weak Acid. 37. What was red cabbage juice used as in the lab we performed? A) As a base. B) As an acid. C) As a colorant. D) As an indicator. Show Answer Correct Answer: D) As an indicator. 38. Give the acid name for H$_{2}$CO$_{3}$ A) Carbonate acid. B) Carbonic acid. C) Carbonous acid. D) Hydrocarbonic acid. Show Answer Correct Answer: B) Carbonic acid. 39. Butanoic acid is miscible (all soluble) in water A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 40. What is the name of the following acid:HCl A) Hydrochloric acid. B) Chlorous acid. C) Perchloric acid. D) Chloric acid. Show Answer Correct Answer: A) Hydrochloric acid. 41. The natural indicator litmus is obtained from ..... A) Moss. B) Cabbage. C) Lichen. D) China rose. Show Answer Correct Answer: C) Lichen. 42. A bronsted lowry acid A) Is a proton donor. B) Is a proton acceptor. C) Produces hydroxide ions in a solution. D) Produces hydrogen ions in a solution. Show Answer Correct Answer: A) Is a proton donor. 43. What elements make up Nucleic Acids? A) C, N, O, H, P. B) C, N, O. C) C, N, O, H, (S). D) C, N, O, H, P, (S). Show Answer Correct Answer: A) C, N, O, H, P. 44. What colour do bases turn in china rosd indicator? A) Blue. B) Green. C) Gray. D) Magenta. Show Answer Correct Answer: B) Green. 45. Which compounds can be classified as acids? A) HCl and NaOH. B) HNO$_{3}$ and NaCl. C) NH$_{3}$ and H$_{2}$CO$_{3}$. D) HBr and H$_{2}$SO$_{4}$. Show Answer Correct Answer: D) HBr and H$_{2}$SO$_{4}$. 46. Potassium phtalamide is the reagent used for amino acid synthesis using A) Gabriel synthesis. B) O donnell synthesis. C) Merrifield synthesis. D) Strecker synthesis. Show Answer Correct Answer: A) Gabriel synthesis. 47. What is the pOH of a 1 x 10$^{-8}$ M solution of HNO$_{3}$? A) 6. B) 9. C) 7. D) 8. Show Answer Correct Answer: A) 6. 48. An acid is a chemical substance usually a ..... A) Liquid. B) Paste. C) Chemical. D) Powder. Show Answer Correct Answer: A) Liquid. 49. Olfactory indicators are:(a) Clove(b) Turmeric(c) Soap(d) Rose Petals A) A. B) C. C) D. D) B. Show Answer Correct Answer: A) A. 50. SUBSTANCES WHICH TASTE SOUR ARE A) ACIDS. B) BASES. C) INDICATORS. D) NONE OF THESE. Show Answer Correct Answer: A) ACIDS. 51. What does a base release when placed in water? A) Hydrogen ions (H+). B) Molecules. C) Ions. D) Hydroxide ions (OH-). Show Answer Correct Answer: D) Hydroxide ions (OH-). 52. What is the formula for permanganic acid? A) MnO$_{4}$$^{-}$. B) H$_{2}$MnO$_{4}$. C) Hold. D) Hmno $ _ {4} $. Show Answer Correct Answer: D) Hmno $ _ {4} $. 53. The range of pH scale is A) 1 to 14. B) 0 to 14. C) 0 to 7. D) 7 to 14. Show Answer Correct Answer: B) 0 to 14. 54. At what pH of our mouth, tooth decay occurs?? A) 5.5. B) Below 5.5. C) Above 5.5. D) Above 7. Show Answer Correct Answer: B) Below 5.5. 55. Pure water has a pH of 7. Pure water ..... A) Is a neutral substance. B) Is an acid. C) Is a base. D) Could be either an acid or a base. Show Answer Correct Answer: A) Is a neutral substance. 56. Indigestion tablets always contain A) Antibiotics. B) Indicators. C) Antacids. D) Acids. Show Answer Correct Answer: C) Antacids. 57. Select the name of the following acid:HCl A) Hydrochloric acid. B) Chlorous acid. C) Chloric acid. D) None of the above. Show Answer Correct Answer: A) Hydrochloric acid. 58. Are these statements about amino acids true or false?Peptide links can undergo hydrolysis by reflux with hydrochloric acid A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 59. What is the formula for hydrophosphoric acid A) HP. B) H$_{3}$PO$_{3}$. C) H$_{3}$P. D) H$_{3}$PO$_{4}$. Show Answer Correct Answer: C) H$_{3}$P. 60. Hydrobromic acid, HBr, is a strong acid. Hydrofluoric acid, HF, is a weak acid. If you prepared equal concentrations of both acids in separate containers which would be TRUE? A) The hydrobromic acid would only partially dissociate. B) Both solutions would have the same pH. C) The pH of hydrobromic acid would be less than the pH of hydrofluoric acid. D) The pH of hydrofluoric acid would be less than the pH of hydrobromic acid. Show Answer Correct Answer: C) The pH of hydrobromic acid would be less than the pH of hydrofluoric acid. ← 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