This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Acids > Class 7 Science Chapter 4 Acids – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 4 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following compound react with acid to release CO$_{2}$?NaCl, CaSO$_{4, }$CaCO$_{3}$, MgSO$_{4}$ A) NaCl. B) CaCO$_{3}$. C) MgSO$_{4}$. D) Case $ _ {4} $. Show Answer Correct Answer: B) CaCO$_{3}$. 2. The main function of tRNA is to ..... A) Carry a message that, when translated, forms proteins. B) Form a portion of ribosomes. C) String together complementary RNA and DNA strands. D) Bring amino acids from the cytoplasm to the ribosomes. Show Answer Correct Answer: D) Bring amino acids from the cytoplasm to the ribosomes. 3. PH is the measure of the concentration of ..... A) H+ ion. B) Acids. C) Bases. D) OH-ion. Show Answer Correct Answer: A) H+ ion. 4. Complete the following reaction:Sulphuric acid + sodium carbonate $\rightarrow$ A) Calcium carbonate + water + carbon dioxide. B) Sodium sulphate + water + carbon dioxide. C) Carbon dioxide + water. D) Sodium chloride + water + carbon dioxide. Show Answer Correct Answer: B) Sodium sulphate + water + carbon dioxide. 5. Nitrogen Bases for DNA: A) Adenine, Guanine, Cytosine, and Uracil. B) Adenine, Guanine, Cytosine, and Phosphate. C) Adenine, Guanine, Cytosine, and Thymine. D) Adenine, Guanine, Cytosine, and Sulfur. Show Answer Correct Answer: C) Adenine, Guanine, Cytosine, and Thymine. 6. Which of the following pH values would be the weakest acid? A) 6. B) 3. C) 1. D) 5. Show Answer Correct Answer: A) 6. 7. The repeating units in both DNA and RNA are called A) Hydrogen bonds. B) Nucleotides. C) Amino acids. D) Nucleic acids. Show Answer Correct Answer: B) Nucleotides. 8. Sulphuric acid is used in A) Toilet cleaner. B) Car batteries. C) Cleaning gold and silver. D) Food. Show Answer Correct Answer: B) Car batteries. 9. Phosphorous acid A) H$_{2}$PO$_{4}$. B) H$_{3}$P. C) H$_{3}$PO$_{4}$. D) Swarm. Show Answer Correct Answer: D) Swarm. 10. If an acid and a base react together it is called a ..... reaction A) Photosynthesis. B) Hypothetical. C) Variable. D) Neutralization. Show Answer Correct Answer: D) Neutralization. 11. Identify the products of the following reaction:CaCO3 + 2HCl $\rightarrow$ A) Calcium hydrogen carbonate and chlorine gas. B) Calcium chloride and water. C) Calcium oxide, carbon dioxide and water. D) Calcium chloride, carbon dioxide and water. Show Answer Correct Answer: D) Calcium chloride, carbon dioxide and water. 12. What is the fomula of carbonic acid? A) H $ _ {2} $ co $ _ {3} $. B) H$_{2}$C$_{2}$O$_{4}$. C) H$_{2}$CrO$_{4}$. D) HCO$_{3}$. Show Answer Correct Answer: A) H $ _ {2} $ co $ _ {3} $. 13. Neutralisation reaction is a A) Physical and reversible change. B) Physical and irreversible change. C) Chemical and reversible change. D) Chemical and irreversible change. Show Answer Correct Answer: D) Chemical and irreversible change. 14. Which of the following codons will code for aspartic acid? A) GAG. B) GAU. C) AAU. D) UGG. Show Answer Correct Answer: B) GAU. 15. A hydronium ion is like a ..... molecule with an extra hydrogen atom. A) Vinegar. B) Acid. C) Water. D) Base. Show Answer Correct Answer: C) Water. 16. What factor can decrease the solubility of carboxylic acid in water? A) The increase in number of carboxyl group. B) The increase in length of the hydrocarbon chain. C) The decrease in length of the hydrocarbon chain. D) The number of hydrogen bond. Show Answer Correct Answer: B) The increase in length of the hydrocarbon chain. 17. PH of rain water in a pollution free area A) 10. B) 5.6. C) 7, 4. D) 7. Show Answer Correct Answer: D) 7. 18. A portion of mRNA is coded CUG. The corresponding DNA is coded A) CAG. B) GAC. C) GTC. D) CTG. Show Answer Correct Answer: B) GAC. 19. Why is toothpaste alkaline? A) It can neutralise acid inyour mouth. B) It can refresh your teeth. C) It can neutralise strong alkaline inyour mouth. D) Toothpaste is not alkaline. Show Answer Correct Answer: A) It can neutralise acid inyour mouth. 20. Select the name for the following acid:H$_{3}$PO$_{4}$ A) Phosphoric acid. B) Phosphorous acid. C) Hydrophosphoric acid. D) None of the above. Show Answer Correct Answer: A) Phosphoric acid. 21. When using pH paper, the pH of a solution can be determined by looking at the ..... of the paper. A) Texture. B) Length. C) Color. D) Mass. Show Answer Correct Answer: C) Color. 22. Antacids are examples of weak bases. Which of the following would most likely be the pH of an antacid? A) 12. B) 2. C) 6. D) 8. Show Answer Correct Answer: D) 8. 23. Which of these pH values would indicate that a solution is a weak base? A) 5.6. B) 4. C) 8. D) 13. Show Answer Correct Answer: C) 8. 24. What is the main reason carboxylic acid has the highest boiling point as compared to other compounds with comparable mass? A) It can form hydrogen bond in water. B) It has higher induced dipole-dipole interactions. C) It is a strong acid. D) It has carboxyl functional group. Show Answer Correct Answer: B) It has higher induced dipole-dipole interactions. 25. Most accepted model of DNA was proposed by A) Watson and Crick. B) Jacob and Monad. C) Korenberg. D) Frederick Mischer. Show Answer Correct Answer: A) Watson and Crick. 26. Each cell in our body contains an acid, name that acid. A) The decarbonicnucleic acid. B) The deoxyribonucleic acid. C) The diprotic acid. D) None of the above. Show Answer Correct Answer: B) The deoxyribonucleic acid. 27. Does your body break down Nucleic Acids for ATP? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: B) No. 28. Which of the following is the strongest acid? A) Blood-7.4. B) Lemon juice-2.5. C) Soap-10. D) Oven cleaner-13.5. Show Answer Correct Answer: B) Lemon juice-2.5. 29. Name this acid. HClO A) Perchloric acid. B) Hydrochloric acid. C) Chloric acid. D) Hypochlorous acid. Show Answer Correct Answer: D) Hypochlorous acid. 30. The suffix-ite in the name of a polyatomic ion becomes ..... in the acid name. A) -ide. B) -ic. C) -ate. D) -ous. Show Answer Correct Answer: D) -ous. 31. Barium Hydroxide is a strong base. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 32. What is the meaning of the word 'acid'? A) Bitter. B) The ashes. C) Sour. D) Burn. Show Answer Correct Answer: C) Sour. 33. Which of the following carboxylic acids is expected to have the highest boiling point? A) CH$_{2}$(COOH)$_{2}$. B) CH$_{3}$CH$_{2}$COOH. C) CH$_{3}$CH(OH)COOH. D) CH$_{3}$CH(Cl)COOH. Show Answer Correct Answer: A) CH$_{2}$(COOH)$_{2}$. 34. The process to go from DNA to mRNA is ..... A) Translation. B) Transcription. C) Replication. D) None of the above. Show Answer Correct Answer: B) Transcription. 35. HCl is a strong acid.What is the pH of a 0.001 M HCl solution? A) 1. B) 3. C) 11. D) 5. Show Answer Correct Answer: B) 3. 36. When dissolved in water, acids produce: A) Hydroxide ions. B) Salts. C) Hydronium ions. D) Bases. Show Answer Correct Answer: C) Hydronium ions. 37. We feel hungry due to the corrosive action of ..... on the inner lining of the stomach A) Hydrochloric acid. B) Benzoic acid. C) Sulphuric acid. D) Nitric acid. Show Answer Correct Answer: A) Hydrochloric acid. 38. When an ant bites, it releases ..... acid. A) Hydrochloric. B) Formic. C) Acetic. D) Nitric. Show Answer Correct Answer: B) Formic. 39. The natural stickiness of each individual atom, caused by the movement of its electron cloud is A) S-S bond. B) Hydrogen bonding. C) Electrostatic charges. D) Van der Waals Forces. Show Answer Correct Answer: D) Van der Waals Forces. 40. Which of these are not properties of acids? A) They taste sweet. B) They conduct electricity. C) They react with active metals. D) None of the above. Show Answer Correct Answer: A) They taste sweet. 41. What are properties of a base? A) Slippery, bitter, does not react with metals, pH above 7. B) Slippery, bitter, reacts with metals, pH below 7. C) Sour, reacts with metals, pH below 7. D) Sour, reacts with metals, pH above 7. Show Answer Correct Answer: A) Slippery, bitter, does not react with metals, pH above 7. 42. When turmeric solution is poured into lime juice, the colour ..... A) Changes from red to yellow. B) Changes from yellow to green. C) Changes from yellow to red. D) Remains yellow. Show Answer Correct Answer: D) Remains yellow. 43. What is the main component of acid rain? A) Nitric acid. B) Carbonic acid. C) Sulfuric acid. D) Hydrochloric acid. Show Answer Correct Answer: C) Sulfuric acid. 44. What is the name of HCl? A) Chlorous acid. B) Chloric acid. C) Hypochloric acid. D) Hydrochloric acid. Show Answer Correct Answer: D) Hydrochloric acid. 45. A pH of 8 is how many times more acidic than a pH of 11? A) 30. B) 3. C) 100. D) 1000. Show Answer Correct Answer: D) 1000. 46. Acids react with metals to produce hydrogen gas. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 47. Hydrochloric Acid solution affect ..... litmus paper A) Red. B) Blue. C) Both of these. D) None of these. Show Answer Correct Answer: B) Blue. 48. WHICH ONE IS SYNTHETIC INDICATOR? A) PHENOLPHTHALEIN. B) TURMERIC INDICATOR. C) LITMUS PAPER. D) CHINE ROSE INDICATOR. Show Answer Correct Answer: A) PHENOLPHTHALEIN. 49. In an mRNA strand, the codon GCC codes for the amino acid ..... , while CCG codes for the amino acid ..... A) Alanine (Ala), Proline (Pro). B) Valine (Val), Lysine (Lys). C) Proline (Pro), Valine (Val). D) Alanine (Ala), Lysine (Lys). Show Answer Correct Answer: A) Alanine (Ala), Proline (Pro). 50. This ion is responsible for the properties of acids A) Hydroxide ion. B) Oxide ion. C) Hydrogen ion. D) Sodium ion. Show Answer Correct Answer: C) Hydrogen ion. 51. What is the formula for phosphorous acid? A) H$_{2}$PO$_{4}$. B) H$_{3}$PO$_{3}$. C) H$_{3}$PO$_{4}$. D) H$_{3}$P. Show Answer Correct Answer: B) H$_{3}$PO$_{3}$. 52. If the acids take the action of alkaline ..... and ..... form A) No ustone water. B) Building. C) C gas and water. D) Lossy gas. Show Answer Correct Answer: A) No ustone water. 53. The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been? A) 5. B) 3. C) 9. D) 7. Show Answer Correct Answer: C) 9. 54. A common alkali used in the lab is A) Sodium hydroxide. B) Hydrogen sulphate. C) Sodium chloride. D) Hydrochloric acid. Show Answer Correct Answer: A) Sodium hydroxide. 55. How many amino acids does your body use to build proteins? A) 25. B) 40. C) 20. D) 15. Show Answer Correct Answer: C) 20. 56. Which of the following acids is found in vinegar? A) Citric acid. B) Lactic acid. C) Tartaric acid. D) Acetic acid. Show Answer Correct Answer: D) Acetic acid. 57. Which of the following is an acid? A) Sugar in water. B) Bleach. C) Toothpaste in water. D) Vinegar. E) Starch in water. Show Answer Correct Answer: D) Vinegar. 58. Which of the following is a common property of acids? A) They have a pH greater than 7. B) They taste bitter. C) They turn blue litmus paper red. D) They feel slippery. Show Answer Correct Answer: C) They turn blue litmus paper red. 59. What is the sequence of amino acids that will be translated from the mRNA below? 5' GCU AUA UAG AGG 3' A) Aspartic Acid-Isoleucine-Stop. B) Aspartic Acid-Isoleucine-Stop. C) Alanine-Isoleucine-Stop-Arginine. D) Alanine-Isoleucine-Stop. Show Answer Correct Answer: D) Alanine-Isoleucine-Stop. 60. What is a codon? A) A protein that combine with DNA molecules to form nucleosomes. B) A determinant of characteristics in living organisms. C) Made up of three nitrogenous bases that codes for an amino acid. D) None of the above. Show Answer Correct Answer: C) Made up of three nitrogenous bases that codes for an amino 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 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books