This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Acids > Class 7 Science Chapter 4 Acids – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 6 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the sequence of amino acids that will be translated from the mRNA below? 5' CCC AGU AGG CGG 3' A) Proline-Serine-Arginine-Arginine. B) Leucine-Arginine-Serine-Arginine. C) Leucine-Serine-Arginine-Serine. D) Proline-Serine-Arginine-Proline. Show Answer Correct Answer: A) Proline-Serine-Arginine-Arginine. 2. Which of these pH values represent an acid? A) 10. B) 12. C) 8. D) 4. Show Answer Correct Answer: D) 4. 3. Bleaching Powder Formula ..... A) Na$_{2}$CO$_{3}$. B) Caocl $ _ {2} $. C) Na$_{2}$SO$_{4}$. D) NH$_{4}$Cl. Show Answer Correct Answer: B) Caocl $ _ {2} $. 4. Bases turn blue litmus paper red. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 5. Which is the stronger acid? A) PH 4. B) PH 13. C) PH 1. D) PH 8. Show Answer Correct Answer: C) PH 1. 6. Which type of substance yields hydrogen ions, H$^{+}$, in an aqueous solution? A) An Arrhenius acid. B) A saturated hydrocarbon. C) An Arrhenius base. D) An unsaturated hydrocarbon. Show Answer Correct Answer: A) An Arrhenius acid. 7. Chlorous acid has the formula A) HCl. B) HCLO. C) Hclo $ _ {2} $. D) HCLO $ _ {3} $. Show Answer Correct Answer: C) Hclo $ _ {2} $. 8. A solution with a pH of 11 has a H$^{+}$ concentration of: A) 1 x 10$^{3}$ moles/liter. B) 1 x 10$^{-11}$ moles/liter. C) 1 x 10$^{11}$ moles/liter. D) 1 x 10$^{-3}$ moles/liter. Show Answer Correct Answer: B) 1 x 10$^{-11}$ moles/liter. 9. A student reacted hydrochloric acid with sodium hydroxide, until the solution was neutral. Next he evaporated, the water from the beaker. She noticed that white crystals remained in the bottom of the beaker. The crystals were most likely ..... A) Water. B) Acid. C) Salt. D) Alkali. Show Answer Correct Answer: C) Salt. 10. Acids in water solvents ..... exhibit taste. A) Sweet. B) Do not. C) Bitter. D) Suk. Show Answer Correct Answer: D) Suk. 11. What is another name for a base? A) Acid. B) Alkaline. C) PH. D) None of the above. Show Answer Correct Answer: B) Alkaline. 12. 0$^\circ$C= ..... Kelvin A) -273. B) 100. C) 273. D) 274. Show Answer Correct Answer: C) 273. 13. What would happen to blue litmus paper if it came into contact with an acid? A) It would turn red. B) It would turn pink. C) It would stay blue. D) It would turn green. Show Answer Correct Answer: A) It would turn red. 14. Which of the Following acid is not stored in Glass Bottles A) HF. B) H$_{2}$SO$_{4}$. C) HNO$_{3}$. D) HCl. Show Answer Correct Answer: A) HF. 15. Which of the following is a pH for a strong acid? A) 13. B) 6. C) 1. D) 7. Show Answer Correct Answer: C) 1. 16. Which of the following correctly identifies an acid-base pair? A) H $ _ {2} $ co $ _ {3} $, co $ _ {3} $$^{2-} $. B) H$_{3}$O$^{+}$, OH$^{-}$. C) NH $ _ {4} $$^{+} $, $ _ {3} $. D) HCL, NaOH. Show Answer Correct Answer: C) NH $ _ {4} $$^{+} $, $ _ {3} $. 17. What are the monomers for Proteins? A) Nucleotides. B) Nucleic Acids. C) Monosaccarides. D) Amino Acids. Show Answer Correct Answer: D) Amino Acids. 18. Natural Indicator? A) Turmeric powder. B) Methyl orange. C) Acid and Base. D) None of the above. Show Answer Correct Answer: A) Turmeric powder. 19. You test a solution with pH paper, and the paper turns blue. The solution is ..... A) A base. B) An acid & a base. C) Neutral. D) An acid. Show Answer Correct Answer: A) A base. 20. The pH scale is used to know what? A) Your temperature. B) Know one knows. C) The colors of acids and bases. D) The strength of acids and bases. Show Answer Correct Answer: D) The strength of acids and bases. 21. The difference between a strong acid and a weak acid is that a strong acid ..... A) Has a higher concentration of OH$^{-}$. B) Has a higher pH. C) Dissociates completely. D) Has a lower pH. Show Answer Correct Answer: C) Dissociates completely. 22. Turmeric is a natural indicator. On adding its paste to acid and base separately, which colours would be observed. A) Yellow in both acid and base. B) Yellow in acid and red in base. C) Pink in acid and yellow in base. D) Red in acid and blue in base. Show Answer Correct Answer: B) Yellow in acid and red in base. 23. Litmus is a common A) Base. B) Catalyst. C) Enzyme. D) Indicator. Show Answer Correct Answer: D) Indicator. 24. A sugar solution has a pH of 7. This means the sugar solution is: A) Acidic. B) Basic. C) Neutral. D) None of the above. Show Answer Correct Answer: C) Neutral. 25. What is the formula of chlorous acid? A) HCLO. B) HCLO $ _ {3} $. C) HCl. D) Hclo $ _ {2} $. Show Answer Correct Answer: D) Hclo $ _ {2} $. 26. What is the difference between DNA and RNA from the point of view of the nitrogenous bases that are present in their nucleotides? A) In DNA, nucleotides can be made up of A, T, C, G. In RNA, nucleotides can also contain A, C or G; however, instead of T, they contain U. B) Purine and Pyrimidine. C) Pyrimidine:Thymine, Cytosine (Urical). D) DNA, RNA. Show Answer Correct Answer: A) In DNA, nucleotides can be made up of A, T, C, G. In RNA, nucleotides can also contain A, C or G; however, instead of T, they contain U. 27. Name the reaction which takes place between an acid and a base A) Displacement. B) Redox reaction. C) Double displacement. D) Neutralization. Show Answer Correct Answer: D) Neutralization. 28. A wasp sting is alkaline. Which one of these substances would neutralise the sting? A) Bleach. B) Vinegar. C) Baking soda. D) Pure water. Show Answer Correct Answer: B) Vinegar. 29. Acidic foods can be identified by what taste? A) Sweet. B) Sour. C) Bitter. D) Salty. Show Answer Correct Answer: B) Sour. 30. The chirality of an amino acid results from the fact that its a carbon that: A) Has no net charge. B) Is bonded to 4 different chemical groups. C) Is symmetric. D) Is a carboxylic acid. Show Answer Correct Answer: B) Is bonded to 4 different chemical groups. 31. Use the CODON CHART to answer the following question.Which of these codons would NOT result in the production of a protein being stopped? A) UGG. B) UAA. C) UAG. D) Than the. Show Answer Correct Answer: A) UGG. 32. Acids have a pH range of A) 1-6.9. B) 7. C) 0-14. D) 7.1-14. Show Answer Correct Answer: A) 1-6.9. 33. (I) Carboxylic acid with 10 carbon is called decanoic acid(II) Carboxylic acid with 5 carbon is called valeraldehyde A) Statement (I) is true but statement (II) is false. B) Statement (I) is false but statement (II) is true. C) Both statement (I) and (II) are false. D) Both statement (I) and (II) are true. Show Answer Correct Answer: A) Statement (I) is true but statement (II) is false. 34. Lemon drop turns A) Red litmus into blue. B) No reaction. C) Blue Litmus into red. D) All of them. Show Answer Correct Answer: C) Blue Litmus into red. 35. Which of the following pH values would be the strongest acid? A) 4. B) 3. C) 1. D) 6. Show Answer Correct Answer: C) 1. 36. The end result of amino acids joining together in translation is a ..... A) DNA. B) Protein. C) Polysaccharide. D) RNA. Show Answer Correct Answer: B) Protein. 37. Which latin word means sour? A) Acid. B) Acidic. C) Aculous. D) Acre. Show Answer Correct Answer: D) Acre. 38. Magnesium + Hydrochloric acid $\rightarrow$ ..... + ..... A) Magnesium hydrochlorite + hydrogen. B) Carbon dioxide + water + magnesium chloride. C) Magnesium chloride + hydrogen. D) Magnesium chloride + water. Show Answer Correct Answer: C) Magnesium chloride + hydrogen. 39. Hydrogen gas was first identified by A) Michel Faraday. B) Issac Newton. C) Henry Cavendish. D) Lavoisier. Show Answer Correct Answer: C) Henry Cavendish. 40. When a protein unfolds, it is A) Making food. B) Denatured. C) Adding amino acids. D) Building. Show Answer Correct Answer: B) Denatured. 41. Bases feel slippery to the touch. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 42. Bases can be referred to as: A) None of the choices. B) Proton acceptors. C) Proton donors. D) Protons. Show Answer Correct Answer: B) Proton acceptors. 43. A group of three nucleotides that translate to an amino acid is called a(n) A) Uncodon. B) Dictionary. C) Initiator. D) Codon. Show Answer Correct Answer: D) Codon. 44. Bleaching powder gives smell of chlorine because it- A) Is unstable. B) Gives chlorine on exposure to atmosphere. C) Is a mixture of chlorine and slaked lime. D) Contains excess of chlorine. Show Answer Correct Answer: B) Gives chlorine on exposure to atmosphere. 45. Phosphorus trichloride A) PCl$_{3}$. B) K$_{3}$Cl. C) KCl$_{3}$. D) P$_{3}$Cl. Show Answer Correct Answer: A) PCl$_{3}$. 46. What is the pH of blood? A) 7.4. B) 7.0. C) 7.8. D) 8.0. Show Answer Correct Answer: A) 7.4. 47. These acids originated from plants except: A) Hydrochloric acid. B) Citric acid. C) Tartaric acid. D) Ascorbic acid. Show Answer Correct Answer: A) Hydrochloric acid. 48. Building blocks of nucleic acid are A) Nitrogen bases. B) Nucleotide. C) Nucleoside. D) Amino acid. Show Answer Correct Answer: B) Nucleotide. 49. How does acid tastes A) Salty. B) Bitter. C) Sweet. D) Sour. Show Answer Correct Answer: D) Sour. 50. An acid commonly added to food items A) Acetic acid. B) Hydrochloric acid. C) Carbonic acid. D) None of the above. Show Answer Correct Answer: A) Acetic acid. 51. When do you take an Antacid? A) When you are Hungry. B) When the soil is too Acidic. C) When you have a Gastric problem in your stomach. D) When the Factory wastes are disposed in waterbodies. E) None of the Above. Show Answer Correct Answer: C) When you have a Gastric problem in your stomach. 52. What is the pH of a solution where the [H+] is 1.0 x 10$^{-11}$? A) 1. B) 14. C) 11. D) 13. Show Answer Correct Answer: C) 11. 53. If one series of bases reads:TTGACTAGG, then the complementary set of bases would read: A) AATCGAACTT. B) TTGACTAGG. C) AACTGATCC. D) AAGTCATCC. Show Answer Correct Answer: C) AACTGATCC. 54. PH greater than 7. A) Acids. B) Bases. C) All. D) None of the above. Show Answer Correct Answer: B) Bases. 55. An acid reacted with an alkali to form a salt and water. Which of these are the reactants? A) Acid and alkali. B) Acid and salt. C) Alkali and water. D) Salt and wate. Show Answer Correct Answer: A) Acid and alkali. 56. Solutions that have more OH-ions than H+ ions are A) Neutral. B) Acids. C) Bases. D) Enzymes. Show Answer Correct Answer: C) Bases. 57. Which of the following is a basic solution? A) HCl dissolved in water. B) Pure water. C) Vinegar. D) Household ammonia. Show Answer Correct Answer: D) Household ammonia. 58. Which is most acidic? A) Milk. B) Black Coffee. C) Lemon Juice. D) Baking Soda. Show Answer Correct Answer: C) Lemon Juice. 59. DNA contains the sugar ..... A) Within limits. B) Dexoxyribose. C) Fructose. D) Sucrose. Show Answer Correct Answer: B) Dexoxyribose. 60. Which of the following set of substances contain acids? A) Curd, milk of magnesia. B) Curd, vinegar. C) Grapes, lime water. D) Vinegar, soap. Show Answer Correct Answer: B) Curd, vinegar. ← 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 7Class 7 Science Chapter 4 Acids Quiz 8Class 7 Science Chapter 4 Acids Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books