This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Acids > Class 7 Science Chapter 4 Acids – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 15 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Acids react with Bases to form A) Water. B) Salt and Hydrogen. C) Hydrogen. D) Salt and water. Show Answer Correct Answer: D) Salt and water. 2. A solution of pH 3 is mixed with a solution of pH 9. The final pH could be A) 12. B) 6. C) 2. D) 10. Show Answer Correct Answer: B) 6. 3. What colour does a base turn red litmus paper? A) Red. B) Blue. C) All the above. D) None of the above. Show Answer Correct Answer: B) Blue. 4. The conjugate acid of HCO$_{3}$$^{-}$is ..... and the conjugate base of HCO$_{3}$$^{-}$ is ..... A) H $ _ {2} $ O;H $ _ {2} $ co $ _ {3} $. B) H $ _ {2} $ co $ _ {3} $;CO $ _ {3} $$^{-2} $. C) CO $ _ {3} $$^{-2} $;CO $ _ {3} $$^{-2} $. D) H $ _ {2} $ co $ _ {3} $;H $ _ {2} $ of. Show Answer Correct Answer: B) H $ _ {2} $ co $ _ {3} $;CO $ _ {3} $$^{-2} $. 5. Contains a methyl group as side chain A) Alanine. B) Proline. C) Histidine. D) Glycine. Show Answer Correct Answer: A) Alanine. 6. Could C$_{2}$H$_{3}$O$_{2}$$^{-}$act as a base when placed in water? A) No, because it cannot accept a H$^{+}$. B) Yes, because it can donate a H$^{+}$. C) No, because it cannot donate a H$^{+}$. D) Yes, because it can accept a H$^{+}$. Show Answer Correct Answer: D) Yes, because it can accept a H$^{+}$. 7. Properties of bases are A) Feel soapy and neutralise acids. B) Irritate your skin and react with metals to produce bubbles. C) Taste sour and turn litmus red. D) Have pH less than 7. Show Answer Correct Answer: A) Feel soapy and neutralise acids. 8. YOU NEED YOUR CODON CHART!mRNA:GGACCUAUUCAGThe DNA sequence for the mRNA above is? A) GGACCUAUUCAG. B) CCTGGATAAGTC. C) GGACCTATTCAG. D) CCUGGAUAAGUC. Show Answer Correct Answer: B) CCTGGATAAGTC. 9. Which of the following ctric acid A) Mango. B) Orange. C) Tamarind. D) None of the above. Show Answer Correct Answer: B) Orange. 10. What are the components of a nucleotide? A) Nitrogen base, phosphate group, and pentose sugar. B) Pentose sugar, purine, and pyrimidine. C) Nitrogen base and a phosphate group. D) DNA, phosphate group, monosaccharide. Show Answer Correct Answer: A) Nitrogen base, phosphate group, and pentose sugar. 11. Which of the following best describes a bronsted-Lowry base? A) Donates hydroxide (OH-) ion. B) Accepts protons (H+). C) Donates protons (H+). D) Donates hydrogen (H+). Show Answer Correct Answer: B) Accepts protons (H+). 12. Holly has an unknown substance in a beaker. She wants to determine the relative pH of the unknown substance. She places a piece of blue litmus paper into the substance, and the litmus paper stays blue.The substance in the beaker A) Has a neutral pH. B) Does not have a pH. C) Is a base. D) Is an acid. Show Answer Correct Answer: C) Is a base. 13. Use your codon chart to answer the following question:AGC UUC AUC GCGWhat is the amino acid sequence from the mRNA above? A) Serine-phenlylalanine-isoluecine-alanine. B) Serine-phenlylalanine-isoluecine-arginine. C) Serine-alanine-phenlylalanine-isoluecine. D) Serine-phenlylalanine-alanine-isoluecine. Show Answer Correct Answer: A) Serine-phenlylalanine-isoluecine-alanine. 14. Which of the following does not have a pH of 7? A) Pure water. B) Table salt. C) Sugar solution. D) Baking soda. Show Answer Correct Answer: D) Baking soda. 15. What color does bases turn litmus paper? A) It turns litmus paper purple. B) It turns red litmus paper re. C) It turns blue litmus paper red. D) It turns red litmus paper blue. Show Answer Correct Answer: D) It turns red litmus paper blue. 16. When acid is added in litmus paper it turns ..... A) Yellow. B) Red. C) Green. D) Blue. Show Answer Correct Answer: B) Red. 17. The substance that does the dissolving in a mixture. A) Mixture. B) Solute. C) Solvent. D) Solution. Show Answer Correct Answer: C) Solvent. 18. All numbers in science A) Are over 10. B) There are no numbers in science. C) Start at one. D) Need a unit of measurement. Show Answer Correct Answer: D) Need a unit of measurement. 19. RNA contains the sugar ..... A) Glucose. B) Dexoxyribose. C) Lipids. D) Within limits. Show Answer Correct Answer: D) Within limits. 20. Common Name of Calcium sulphate is A) Calcium Carbonate. B) Gypsum. C) Baking soda. D) Sodium Carbonate. Show Answer Correct Answer: B) Gypsum. 21. What is the name of H$_{3}$PO$_{4}$? A) Hydrophosphoric acid. B) Phosphoric acid. C) Phosphoric hydroxide. D) Phosphorous acid. Show Answer Correct Answer: B) Phosphoric acid. 22. Select the formula for the following acid:Carbonic Acid A) H $ _ {2} $ co $ _ {3} $. B) HCO$_{3}$. C) H$_{4}$C. D) None of the above. Show Answer Correct Answer: A) H $ _ {2} $ co $ _ {3} $. 23. WINDOW CLEANER CAN BE FOUND IN ..... A) AMMONIUM HYDROXIDE. B) LACTIC ACID. C) CALCIUM HYDROXIDE. D) OXALIC ACID. Show Answer Correct Answer: A) AMMONIUM HYDROXIDE. 24. What is the pH scale? A) Unit of measurement for amount of electrons. B) Unit of measurement for Acids. C) Unit of measurement for temperature. D) Unit of maesurement for Acids. Show Answer Correct Answer: B) Unit of measurement for Acids. 25. A solution turned red litmus into blue.Its pH value ..... A) 1. B) 10. C) 4. D) 5. Show Answer Correct Answer: B) 10. 26. The DNA sequence T A C C G T A G A G G C would produce which of the following amino acid sequences? A) Met-Ala-Ser-Pro. B) Val-His-Arg-Glu. C) Glu-Light-Ser-Leu. D) Met-Val-ASP-PRO. Show Answer Correct Answer: A) Met-Ala-Ser-Pro. 27. Phosphoric acid (a) A) H$_{3}$P. B) H$_{3}$PO$_{2}$. C) H$_{3}$PO$_{3}$. D) A. H3PO4. Show Answer Correct Answer: D) A. H3PO4. 28. Nitric acid is present in vinegar A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 29. Which of the following is INCORRECT for an acid? A) Sour taste. B) PH is less than 7. C) Turn red litmus solution blue. D) Must contain H in the formula. Show Answer Correct Answer: C) Turn red litmus solution blue. 30. A solution has no effect on red litmus paper. It has to be one of the following substances. Which one is it? A) Soap solution. B) Sodium chloride solution. C) Potassium hydroxide solution. D) Sodium hydroxide solution. Show Answer Correct Answer: B) Sodium chloride solution. 31. Acids turn red litmus paper blue. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 32. Nitric acid reacts with sodium hydroxide solution to form a salt and water. Which of the following is the correct word equation? A) Nitric acid + sodium hydroxide + water. B) Salt + water $\rightarrow$ nitric acid + sodium hydroxide. C) Nitric acid + sodium hydroxide $\rightarrow$ sodium nitrate + water. D) Sodium nitrate + water $\rightarrow$ nitric acid + sodium hydroxide. Show Answer Correct Answer: C) Nitric acid + sodium hydroxide $\rightarrow$ sodium nitrate + water. 33. When an acid and a base are mixed, what is the reaction called? A) Neutralization. B) Hydrolyzed. C) Hydro Ionization. D) A salt and a water reaction. Show Answer Correct Answer: A) Neutralization. 34. Any number on the pH scale greater than 7 is considered a? A) Phancy. B) Lucky. C) Base. D) Classic. Show Answer Correct Answer: C) Base. 35. The ..... acid stores information about our body. A) Nitric. B) Hemoglobin. C) Deoxyribonucleic. D) DNA. E) Amino. Show Answer Correct Answer: C) Deoxyribonucleic. 36. Which of the following is NOT a strong base? A) Al(OH)$_{3}$. B) NaOH. C) Ca (oh) $ _ {2} $. D) RBOH. Show Answer Correct Answer: A) Al(OH)$_{3}$. 37. What happens when sodium hydroxide solution is poured on red litmus paper? A) Red litmus remains red. B) Red litmus turns blue. C) Red litmus turns blue and then white. D) Red litmus turns yellow. Show Answer Correct Answer: B) Red litmus turns blue. 38. Phenyl isothiocyanate is used in A) Sanger's method. B) Edman's method. C) Hydrizinalysis. D) None of the above. Show Answer Correct Answer: B) Edman's method. 39. Nitrogen base + sugar + phosphate forms A) Nitrogen base pairs. B) Nucleoside. C) Nucleotide. D) Double helix. Show Answer Correct Answer: C) Nucleotide. 40. An arrhenius acid A) Produces hydrogen ions in a solution. B) Is a proton acceptor. C) Is a proton donor. D) Produces hydroxide ions in a solution. Show Answer Correct Answer: A) Produces hydrogen ions in a solution. 41. What is an acid? A) A chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus paper red. B) Has a pH of 11. C) Has a pH of 7. D) None of the above. Show Answer Correct Answer: A) A chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus paper red. 42. Which of the following is a carbonate? A) Aluminum. B) Marble. C) Vinegar. D) Zinc. Show Answer Correct Answer: B) Marble. 43. Methyl Orange Index Color ..... A) Green. B) Yellow. C) Red. D) Orange. Show Answer Correct Answer: B) Yellow. 44. A proton or H$^{+}$ (hydrogen ion) forms what type of bond with water to form a hydronium ion H$_{3}$O$^{+}$ A) Covalent bond. B) Coordinate covalent bond. C) Network bond. D) Ionic bond. Show Answer Correct Answer: B) Coordinate covalent bond. 45. Three acidic solutions A, B and C have pH = 0, 3 and 5 respectively. Which solution has the highest concentration of H+ ions? A) Don't know. B) B. C) A. D) C. Show Answer Correct Answer: C) A. 46. Which of the following is a pH for a strong base? A) 8. B) 7. C) 1. D) 13. Show Answer Correct Answer: D) 13. 47. This ion is responsible for the properties of bases A) Hydrogen ion. B) Oxide ion. C) Hydroxide ion. D) Sodium ion. Show Answer Correct Answer: C) Hydroxide ion. 48. Which property is not characteristic of a base? A) C It reacts with an ammonium salt to form ammonia. B) A It reacts with a carbonate to form carbon dioxide. C) B It reacts with an acid to form a salt. D) D It turns universal indicator paper blue. Show Answer Correct Answer: B) A It reacts with a carbonate to form carbon dioxide. 49. A compound that changes color when it is in contact with an acid or base is called ..... A) Acid. B) Base. C) Indicator. D) Neutral. Show Answer Correct Answer: C) Indicator. 50. Name the Acid:H$_{2}$S A) Hydrosulfuric Acid. B) Hydrosulfurous Acid. C) Sulfurous Acid. D) Sulfuric Acid. Show Answer Correct Answer: A) Hydrosulfuric Acid. 51. What is the range of pH scale? A) 12-14. B) 1-14. C) 0-14. D) 1-6. Show Answer Correct Answer: C) 0-14. 52. Which of the following chemical formulas is NOT an acid? A) HF. B) Any otheruce. C) HCl. D) HBr. Show Answer Correct Answer: B) Any otheruce. 53. Is this a neutralization reaction?NaOH + HCL $\rightarrow$ A) YES. B) NO. C) All the above. D) None of the above. Show Answer Correct Answer: A) YES. 54. What colour does litmus paper turn when added to an acid? A) Blue. B) Red. C) Green. D) Colourless. Show Answer Correct Answer: B) Red. 55. Neutral solutions have a pH of: A) 7. B) 0. C) 1. D) 14. Show Answer Correct Answer: A) 7. 56. A wasp sting has a pH of 10. You can treat a wasp sting with A) Toothpaste. B) Water. C) Vinegar. D) Sodium hydroxide. Show Answer Correct Answer: C) Vinegar. 57. The process of using DNA to make copies of RNA is known as- A) Photosynthesis. B) Transcription. C) Respiration. D) Translation. Show Answer Correct Answer: B) Transcription. 58. Plaster of Paris is obtained by heating gypsum at 373$^{0}$C A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 59. What does pH stand for? A) Phosphorus:Hydrogen ratio. B) Percent of hydrogen. C) Phenolphthalein. D) Power of Hydrogen. Show Answer Correct Answer: B) Percent of hydrogen. 60. Magnesium metal is a gas caused by action between hydrochloric acids A) Chlorine. B) Oxygen. C) Hydrogen. D) Carbon Dioxide. Show Answer Correct Answer: C) Hydrogen. ← 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