This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Acids > Class 7 Science Chapter 4 Acids – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 13 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. ..... are used to neutralise acid in the stomach. A) Antacids. B) Toothpastes. C) More strong acids. D) Bacteria. Show Answer Correct Answer: A) Antacids. 2. What is the range of pH values in an acidic solution? A) PH = 7. B) 7-14. C) 0-7. D) 0-14. Show Answer Correct Answer: C) 0-7. 3. Which of the following statement is or are correct? A) Ascorbic acid is present in amla and citrus fruit (lemon and oranges). B) Oxalic acid is present in spinach (palak). C) Tartaric acid is present in tamarind, unripe grapes and unripe mangoes. D) All the above. Show Answer Correct Answer: D) All the above. 4. When found in food, bases are ..... A) Salty. B) Bitter. C) Sour. D) Soggy. Show Answer Correct Answer: B) Bitter. 5. Before Factory wastes are disposed out to Waterbodies, why do they add basic substances? A) So that the Factory wastes decomposes in Waterbodies. B) Because they have Respect towards them. C) So that they do not harm the Aquatic animals and Plants. D) None of the Above. Show Answer Correct Answer: C) So that they do not harm the Aquatic animals and Plants. 6. Which of the following is the best description of a salt? A) Forms when two metals react. B) Forms when a carbonate reacts with sodium hydroxide. C) Forms when all or part of the hydrogen ions in an acid is replaced. D) Forms when two alkali reacts. Show Answer Correct Answer: C) Forms when all or part of the hydrogen ions in an acid is replaced. 7. The reaction between an acid and an alkali is A) Condensation. B) Neutralization. C) Acidification. D) Evaporation. Show Answer Correct Answer: B) Neutralization. 8. What does corrosive mean? A) That a substance is a strong base. B) The substance is the strongest acid. C) That a substance can easily wear away. D) That a substance is neutral. Show Answer Correct Answer: C) That a substance can easily wear away. 9. What is produced in the process of neutralisation? A) Salt. B) Acids & bases. C) Heat, Salt and water. D) Sugar, salt and heat. Show Answer Correct Answer: C) Heat, Salt and water. 10. An oxyacid is made up of hydrogen, ..... , and a third element A) Oxygen. B) Hydroxide. C) Carbon. D) Nitrogen. Show Answer Correct Answer: A) Oxygen. 11. An acid can be corrosive. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 12. Eggs are a complete protein. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 13. Bases are generally ..... to touch A) Hot. B) Rough. C) Soapy. D) Cold. Show Answer Correct Answer: C) Soapy. 14. Does Alkali's have chemical burn A) Yes. B) Noo. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 15. An acid present in aerated drinks is A) Carbonic acid. B) Formic acid. C) Maleic acid. D) Lactic acid. Show Answer Correct Answer: A) Carbonic acid. 16. When aqueous sodium carbonate (Na$_{2}$CO$_{3}$) with HCl(aq), it gives A) NaOH, H$_{2}$ (g) and CO$_{2}$(g). B) NaCl, H$_{2}$ O and CO$_{2}$(g). C) NaHCO$_{3}$, H$_{2}$ (g) and CO$_{2}$(g). D) NaHCO$_{3}$, H$_{2}$ O and CO$_{2}$(g). Show Answer Correct Answer: B) NaCl, H$_{2}$ O and CO$_{2}$(g). 17. Are all acids dangerous? A) Yes, all acids are dangerous because the dissolve metal. B) No, all acids are not dangerous. We can eat and drink things with acid. C) All the above. D) None of the above. Show Answer Correct Answer: B) No, all acids are not dangerous. We can eat and drink things with acid. 18. Hc $ _ {2} $ h $ {3} $ o $ {2} $ (a) A) Hydroacetic acid. B) A. Acetic acid. C) Hydroacetous acid. D) Acetous acid. Show Answer Correct Answer: B) A. Acetic acid. 19. Select the name for the following acid:H$_{2}$SO$_{3}$ A) Sulfurous acid. B) Sulfuric acid. C) Hydrosulfuric acid. D) None of the above. Show Answer Correct Answer: A) Sulfurous acid. 20. Tick the natural indicators A) Phenophthalien. B) Methylene blue. C) Turmeric. D) Iodine solution. Show Answer Correct Answer: C) Turmeric. 21. Which is the most likely pH for a solution of a weak acid? A) 1. B) 14. C) 5. D) 11. Show Answer Correct Answer: C) 5. 22. Strong acids and alkalis are ..... A) Burn litmus paper. B) Sour. C) Sweet. D) Corrosive/Caustic. Show Answer Correct Answer: D) Corrosive/Caustic. 23. Which is the correct order of boiling points of carboxylic acids, from the lowest to the highest? A) Methanoic acid, ethanoic acid, butanoic acid, propanoic acid. B) Methanoic acid, ethanoic acid, propanoic acid, butanoic acid. C) Ethanoic acid, methanoic acid, propanoic acid, butanoic acid. D) Methanoic acid, propanic acid, butanoic acid, ethanoic acid. Show Answer Correct Answer: B) Methanoic acid, ethanoic acid, propanoic acid, butanoic acid. 24. When using the Bronsted Lowry definition of acids and bases, the acid will ..... a hydrogen proton. A) Donate. B) Accept. C) All the above. D) None of the above. Show Answer Correct Answer: A) Donate. 25. You can eat or drink an acid. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 26. Sides or backbones of DNA molecules are made up of? A) Alternating sugars-phosphates. B) Nitrogen and Phosphate. C) Alternating sugar-sulfur. D) Carbon and Hydrogen. Show Answer Correct Answer: A) Alternating sugars-phosphates. 27. What is the name for the following compound? Ca(OH)$_{2}$ A) Calcium hydroxide. B) Calcous. C) Calcium hydrogen oxygen. D) Calcic. Show Answer Correct Answer: A) Calcium hydroxide. 28. What is the meaning of corrosive A) Nice. B) Acid. C) Healthy. D) To destroy slowly. Show Answer Correct Answer: D) To destroy slowly. 29. Which statement describes a base? A) Stays clear in Phenolphthalein. B) Tastes Sour. C) Turns litmus paper red. D) Turns magenta in Phenolphthalein. Show Answer Correct Answer: D) Turns magenta in Phenolphthalein. 30. If a solution is acidic, it can be neutralized by adding A) A base. B) A stronger acid. C) Heat. D) A weaker acid. Show Answer Correct Answer: A) A base. 31. Non Metallic oxides are called ..... A) Amphoteric oxides. B) Acidic oxides. C) Neutral oxides. D) Basic oxides. Show Answer Correct Answer: B) Acidic oxides. 32. Nucleic Acids are A) DNA and RNA. B) Polynucleotides. C) Polymers. D) All of these. Show Answer Correct Answer: D) All of these. 33. Soap is a weak base. What is true about the taste of bases? A) They taste bitter. B) They taste salty. C) They taste sour. D) They taste sweet. Show Answer Correct Answer: A) They taste bitter. 34. H $ _ {2} $ co $ _ {3} $ A) Carbonic acid. B) Hydrocarbonic acid. C) Carbonous acid. D) Hydrocarbonous acid. Show Answer Correct Answer: A) Carbonic acid. 35. Is the following compound an acid or a base?H$_{3}$PO$_{4}$ A) Acid. B) Base. C) All the above. D) None of the above. Show Answer Correct Answer: A) Acid. 36. Any number of the pH scale less than 7 is considered? A) Cleaning products. B) A healthy option. C) A neutral. D) An Acid. Show Answer Correct Answer: D) An Acid. 37. An acid reacts with metal to produce A) Carbon dioxide. B) Hydrogen gas. C) Hydrogen gas and water. D) Salt and hydrogen gas. Show Answer Correct Answer: D) Salt and hydrogen gas. 38. Which compound is prepared using Chlor Alkali process? A) Bleaching Powder. B) Sodium hydroxide. C) Sodium carbonate. D) Plaster of Paris. Show Answer Correct Answer: A) Bleaching Powder. 39. Which drug is used for indigestion? A) Anti-septic. B) Anti-Biatic. C) Analyzistic. D) Antacid. Show Answer Correct Answer: D) Antacid. 40. A beaker full of acid is added to a beaker full of base. The pH of the base will: A) Change constantly. B) Stay the same. C) Decrease. D) Increase. Show Answer Correct Answer: C) Decrease. 41. Does tablets have alkalis? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 42. What is the formula for nitric acid? A) NO. B) HNO$_{2}$. C) HNO$_{3}$. D) HNO$_{4}$. Show Answer Correct Answer: C) HNO$_{3}$. 43. Apples contain ..... A) Acetic acid. B) Sulphuric acid. C) Malic acid. D) None of the above. Show Answer Correct Answer: C) Malic acid. 44. Name this acid:HNO$_{2}$ A) Nitrous acid. B) Hydrogen nitrogen oxygen. C) Hydronitrous acid. D) Hyponitrous acid. Show Answer Correct Answer: A) Nitrous acid. 45. In an mRNA strand, the codon AAG codes for the amino acid, while GUU codes for the amino acid . A) Lysine (Lys), Leucine (Leu). B) Asparagine (Asn), Valine (Val). C) Lysine (Lys), Valine (Val). D) Arginine (Arg), Glutamine (Glu). Show Answer Correct Answer: C) Lysine (Lys), Valine (Val). 46. Malic acid is present in A) Apple. B) Spinach. C) Lemon. D) Milk. Show Answer Correct Answer: A) Apple. 47. Acids are bitter to taste A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 48. Write the formula for copper (I) phosphide? A) With $ _ {1} $ p. B) CuP$_{3}$. C) CuP. D) With $ _ {3} $ p. Show Answer Correct Answer: D) With $ _ {3} $ p. 49. Which base is ONLY found in DNA? A) Adenine. B) Thymine. C) Guanine. D) Cytosine. Show Answer Correct Answer: B) Thymine. 50. 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) Milk, lemon juice, baking soda, bleach. B) Baking soda, bleach, lemon juice, milk. C) Lemon juice, milk, baking soda, bleach. D) Bleach, baking soda, milk, lemon juice. Show Answer Correct Answer: D) Bleach, baking soda, milk, lemon juice. 51. Propanamine (CH$_{3}$CH$_{2}$CH$_{2}$NH$_{2}$) is a A) Strong base. B) Weak Acid. C) Weak Base. D) Strong Acid. Show Answer Correct Answer: C) Weak Base. 52. Carbonic acid present in A) Minerals. B) Milk. C) Cool drinks. D) Egg. Show Answer Correct Answer: C) Cool drinks. 53. 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. 54. 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) Sulfuric acid. B) Hydrochloric acid. C) Phosphoric acid. D) Nitric acid. Show Answer Correct Answer: A) Sulfuric acid. 55. 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. 56. Can acids corrode? A) No. B) Yes. C) Maybe. D) You don't know. Show Answer Correct Answer: B) Yes. 57. What causes shiny pennies to become dull? A) They turn dull because they are just old. B) They turn dull because they get dirty. C) They turn dull when exposed to air over time (Oxidation). D) They are dull to begin with. Show Answer Correct Answer: C) They turn dull when exposed to air over time (Oxidation). 58. What is the name of this compound:N$_{2}$O$_{5}$ A) Nitrogen Oxide. B) Dinitrogen Pentoxide. C) Dinitrate pentaoxide. D) Nitrate pentaoxide. Show Answer Correct Answer: B) Dinitrogen Pentoxide. 59. 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. 60. 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) NaI. B) Faith (no $ _ {3} $) $ _ {2} $. C) MgBr$_{2}$. D) NaCl. Show Answer Correct Answer: D) NaCl. ← 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