This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Acids > Class 7 Science Chapter 4 Acids – Quiz 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 12 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Acid present in ant bite A) Hydrochloric acid. B) Nitric acid. C) Formic acid. D) Sulphuric acid. Show Answer Correct Answer: C) Formic acid. 2. Which one of these is an alkali? A) Lemon juice. B) Vinegar. C) Sugar solution. D) Oven cleaner. Show Answer Correct Answer: D) Oven cleaner. 3. Which of the following describes a battery? A) Acid. B) Base. C) All the above. D) None of the above. Show Answer Correct Answer: A) Acid. 4. What will be the resulting mRNA from this DNA sequence:GAT-TAC-AGA-TTA-CAT? A) CTA-ATG-TCT-AAT-GTA. B) Cua-Au-uc-Au-Gua. C) Gau-ug-ug-uga. D) Cat-Aca-Tac-so-Tag. Show Answer Correct Answer: B) Cua-Au-uc-Au-Gua. 5. Organic acids are present ..... in the ..... we consume. A) Physically and chemically. B) Directly and liquid. C) Naturally and food items. D) Both a and c. Show Answer Correct Answer: C) Naturally and food items. 6. What salt is produced if you react sodium hydroxide with hydrochloric acid? A) Sodium hydroxide. B) Sodium chloride. C) Sodium sulfate. D) Sodium nitrate. Show Answer Correct Answer: B) Sodium chloride. 7. Which of the following are examples of protein? A) Cutin, waxes, fats, oils. B) Collagen, enzymes, hemoglobin, insulin, and antibodies. C) Dna and rna. D) Glucose, sucrose, glycogen, and cellulose. Show Answer Correct Answer: B) Collagen, enzymes, hemoglobin, insulin, and antibodies. 8. Which of the following word pairs correctly completes the sentence below? ..... are corrosive substances characterized as having a strong smell, a sour taste, and are able to give up a H$^{+}$ ion. A) Amphoteric Compound. B) Electrolyte. C) Bases. D) Acids. Show Answer Correct Answer: D) Acids. 9. What happens to the pH of an acid during neutralisation? A) It stays the same. B) It moves towards pH 14. C) It moves toward pH 1. D) It moves towards pH 7. Show Answer Correct Answer: D) It moves towards pH 7. 10. The color of the Phenaphthaline index in alkaline solvents ..... A) Green. B) Orange. C) Yellow. D) Pink. Show Answer Correct Answer: D) Pink. 11. In nucleic acids, nucleotides are connected with each other by A) Peptide bond. B) Phoshpo diester bond. C) Phosphate bond. D) Ester bond. Show Answer Correct Answer: B) Phoshpo diester bond. 12. Choose the nucleotide sequence of the RNA strand that would be complementary to the following strand:GTAGTCA A) CATCAGT. B) Profile. C) Sakyaagu. D) ACGACTG. Show Answer Correct Answer: C) Sakyaagu. 13. If we rub a slice of lemon on our palm what happens A) Skin will burn. B) Nothing happens. C) Slight burning sensation. D) Skin color changes. Show Answer Correct Answer: C) Slight burning sensation. 14. A solution with a pH of 8.6 would be ..... A) Acid. B) Base. C) Neutral. D) Acid and Base. Show Answer Correct Answer: B) Base. 15. Many cleaning solutions are bases. Which of the following is a property of most bases? A) Tastes sour. B) Feels slippery. C) White color. D) Can only be liquid. Show Answer Correct Answer: B) Feels slippery. 16. Which of the following statements about a concentrated acid is correct? A) It is an acid that fully ionizes in water. B) It can react with copper metal. C) It must contain hydrogen ions when in aqueous form. D) It cannot react with copper(II) oxide. Show Answer Correct Answer: C) It must contain hydrogen ions when in aqueous form. 17. Which substance has the lowest pH? A) Milk. B) Pure water. C) NaOH. D) Lemon juice. Show Answer Correct Answer: D) Lemon juice. 18. Which one of these is an acid? A) Oven cleaner. B) Vinegar. C) Pure water. D) Salt water. Show Answer Correct Answer: B) Vinegar. 19. Use the CODON CHART to answer the following question.What amino acid is coded for by the codon CAG? A) Tyrosine. B) Glutamine. C) Valine. D) Histidine. Show Answer Correct Answer: B) Glutamine. 20. Al2O3 reacts with NaOH to form A) Salt and H2. B) Salt and CO2. C) Salt and water. D) None. Show Answer Correct Answer: C) Salt and water. 21. Fill in the blank:- ..... turns colourless when added to an acid. A) Phenolphthalein. B) Methyl orange. C) Litmus paper. D) All of these. Show Answer Correct Answer: A) Phenolphthalein. 22. What is obtained from the solution of acid and base? A) NaCl. B) Sodium hydroxide. C) Citrus. D) None of the above. Show Answer Correct Answer: D) None of the above. 23. Acid is derived from which latin word A) Feranium. B) Potassium. C) Acidus. D) Acrobut. Show Answer Correct Answer: C) Acidus. 24. Which of the following is NOT a name for H+ (H$_{3}$O$^{+}$)? A) Proton. B) Hydrogen Ion. C) Hydronium Ion. D) Hydroxide Ion. Show Answer Correct Answer: D) Hydroxide Ion. 25. What is the chemical name of baking soda? A) Sodium Carbonate. B) Calcium carbonate. C) Sodium bicarbonate. D) Sodium hydroxide. Show Answer Correct Answer: C) Sodium bicarbonate. 26. A substance with a pH of 8 is ..... A) A weak base. B) A strong acid. C) A strong base. D) A weak acid. Show Answer Correct Answer: A) A weak base. 27. Which of the following substances is acidic? A) Lemon-lime soda. B) Soap. C) Distilled water. D) Baking soda. Show Answer Correct Answer: A) Lemon-lime soda. 28. When dissolved in water, bases produce: A) Hydroxide ions. B) Salts. C) Hydrogen ions. D) Acids. Show Answer Correct Answer: A) Hydroxide ions. 29. What is the name of HClO$_{3}$? A) Hypochloric acid. B) Hydrochloric acid. C) Chloric acid. D) Chlorous acid. Show Answer Correct Answer: C) Chloric acid. 30. Which of these is not part of a nucleotide? A) Phospholipid. B) Phosphate. C) Nitrogen base. D) Sugar. Show Answer Correct Answer: A) Phospholipid. 31. What is the basic structure of an Amino acid? A) Basic group, aliphatic group, hydrogen and a R side chain. B) Acidic group, amino group, hydrogen and a R side chain. C) Positively charged group, acidic group, hydrogen and an aromatic group. D) Negatively charged group, basic group, hydrogen and an aliphatic group. Show Answer Correct Answer: B) Acidic group, amino group, hydrogen and a R side chain. 32. Cystein is a sulfur containing amino acid and forms a A) S-S bond. B) K bond. C) Not bond. D) Hydrogen bond. Show Answer Correct Answer: A) S-S bond. 33. Which pH level indicates a weak alkali? A) 4-6. B) 1-3. C) 8-11. D) 12-14. Show Answer Correct Answer: C) 8-11. 34. The substance that dissolves the solute in a solution is the ..... A) Solvent. B) Sour. C) Solute. D) Hydrogen ions. Show Answer Correct Answer: A) Solvent. 35. Write the formula of the following compound.Nitrous acid A) HN. B) HNO$_{2}$. C) HNO$_{3}$. D) None of the above. Show Answer Correct Answer: B) HNO$_{2}$. 36. Which is not the product of neutralization process A) Heat. B) Water. C) Salts. D) Sugar. Show Answer Correct Answer: D) Sugar. 37. Which of the following is a Mineral Acid? A) Sulphuric Acid. B) Oxalic Acid. C) Citric Acid. D) Glycolic Acid. Show Answer Correct Answer: A) Sulphuric Acid. 38. In a base phenolphthalein will give what color? A) Clear. B) Green. C) Pink. D) Blue. Show Answer Correct Answer: C) Pink. 39. Which characteristics describe a base? A) Sour, indicator turns red, pH less than 7, produces hydrogen ions (H$^{+}$). B) Sour, indicator turns red, pH greater than 7. C) Bitter, slippery, indicator turns blue, pH greater than 7, produces hydroxide ions (OH$^{-}$). D) Neutral, pH of 7. Show Answer Correct Answer: C) Bitter, slippery, indicator turns blue, pH greater than 7, produces hydroxide ions (OH$^{-}$). 40. Which has a slippery texture? A) Acid. B) Base. C) All the above. D) None of the above. Show Answer Correct Answer: B) Base. 41. Which of the following word pairs correctly completes the sentence below? ..... are corrosive substances characterized as having a oily feel, a bitter taste, and a ..... A) Bases; pH greater than 7. B) Acids; pH less than 7. C) Bases; pH less than 7. D) Acids; pH greater than 7. Show Answer Correct Answer: A) Bases; pH greater than 7. 42. Which of the following is a binary acid? A) H $ _ {2} from $. B) H$_{2}$SO$_{4}$. C) HNO$_{3}$. D) HC $ _ {2} $ h $ {3} $ o $ {2} $. Show Answer Correct Answer: A) H $ _ {2} from $. 43. Name the acid present in our stomach. A) Nitric acid. B) Sulphuric acid. C) Carbonic acid. D) Hydrochloric acid. Show Answer Correct Answer: D) Hydrochloric acid. 44. What are the differences between proteins and lipids? A) Proteins function to help speed up reactions, copy DNA, and transport moleculesLipids allow things to enter/leave the cell and can store energy. B) Proteins all things to enter/leave the cell and can store energyLipids function to help speed up reactions, copy DNA, and transport molecules. C) None of the above. D) None of the above. Show Answer Correct Answer: A) Proteins function to help speed up reactions, copy DNA, and transport moleculesLipids allow things to enter/leave the cell and can store energy. 45. Lemon juice is ..... in taste A) Bitter. B) Sour. C) Salty. D) Sweet. Show Answer Correct Answer: B) Sour. 46. What is another name for basic A) Alkenes. B) Lewis. C) Alkaline. D) Arrhenius. Show Answer Correct Answer: C) Alkaline. 47. When acid and base reacts ..... and ..... are formed? A) Salt, Carbon dioxide. B) Salt, Hydrogen. C) Hydrogen, carbondioxide. D) Salt, Water. Show Answer Correct Answer: D) Salt, Water. 48. Which of the following is basic in nature? A) Lime water. B) Baking soda. C) Both (a) and (b). D) Lemon juice. Show Answer Correct Answer: C) Both (a) and (b). 49. Which is a basic amino acid A) Histidine. B) Alanine. C) Proline. D) Serine. Show Answer Correct Answer: A) Histidine. 50. When you left a steel nail in a bag with copper pennies and a vinegar and salt solution, the nail turned a copper color. What happened? A) The steel nail turned into a gold nail!. B) The steel nail became copper all the way through. C) Nothing happened in my bag, so I don't care. D) The nail was covered with a thin layer of copper. Show Answer Correct Answer: D) The nail was covered with a thin layer of copper. 51. NH$_{3}$ + H$_{2}$O + CO$_{2}$ + NaCl gives A) NaHCO $ _ {3} $ + NH $ _ {4} $ Cl + H $ _ {2} $ o. B) NaHCO $ _ {3} $ + NH $ _ {4} $ Cl. C) NaHCO $ _ {3} $. D) NH$_{4}$Cl. Show Answer Correct Answer: B) NaHCO $ _ {3} $ + NH $ _ {4} $ Cl. 52. What is the name of the following:NaOH A) Hydrosodium acid. B) Sodium oxide hydrogen. C) Sodium hydrogen oxide. D) Sodium hydroxide. Show Answer Correct Answer: D) Sodium hydroxide. 53. The color of universal indicator in hydrochloric acid: A) Green. B) Red. C) Blue. D) Purple. Show Answer Correct Answer: B) Red. 54. Is this neutralised wasp sting and vinegar A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 55. The pH value of an acid represents its ..... of positive ions in the solution A) Color. B) Amount. C) Charge. D) Concentration. Show Answer Correct Answer: D) Concentration. 56. OUR STOMACH CONTAINS ..... A) SODIUM HYDROGEN. B) HYDROCHLORIC ACID. C) AMMONIUM HYDROXIDE. D) NONE OF THESE. Show Answer Correct Answer: B) HYDROCHLORIC ACID. 57. A solution with a pH value of 3 is considered? A) Acidic. B) Basic. C) Neutral. D) Salty. Show Answer Correct Answer: A) Acidic. 58. The backbone of DNA is made up of ..... & ..... units. A) Phosphate & phosphate. B) Sugar & phosphate. C) Base & phosphate. D) Sugar & base. Show Answer Correct Answer: B) Sugar & phosphate. 59. The salt formed when sulfuric acid reacts with iron oxide (rust) is A) Iron sulfate. B) Iron hydroxide. C) Iron chloride. D) Iron nitrate. Show Answer Correct Answer: A) Iron sulfate. 60. What sugar is found in DNA? A) Within limits. B) Dexoxyribose. C) Glucose. D) Fructose. Show Answer Correct Answer: B) Dexoxyribose. ← 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