This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Acids > Class 7 Science Chapter 4 Acids – Quiz 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 14 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 1 M sodium hydroxide solution has a higher electrical conductivity than that of 1 M ammonia solution. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 2. Nitrogen bases for RNA: A) Adenine, Guanine, Cytosine, and Uracil. B) Adenine Guanine, Cytosine, and Sulfur. C) Adenine, Guanine, Cytosine, and Thymine. D) Adenine, Guanine, Cytosine, and Phosphate. Show Answer Correct Answer: A) Adenine, Guanine, Cytosine, and Uracil. 3. What can be explained by the Arrhenius theory? A) The behavior of many acids and bases. B) The effect of stress on phase equilibrium. C) The operation of an electrochemical cell. D) The spontaneous decay of some nuclei. Show Answer Correct Answer: A) The behavior of many acids and bases. 4. All hydrophobic aminoacids (valine, leucine, isoleucine etc) share which of the following properties? A) Polar uncharged R-groups. B) Non-polar uncharged R-groups. C) All the above. D) None of the above. Show Answer Correct Answer: B) Non-polar uncharged R-groups. 5. In DNA, adenine bonds with ..... A) Cytosine. B) Guanine. C) Adenine. D) Thymine. Show Answer Correct Answer: D) Thymine. 6. Which of the following is used to prepare detergents? A) Baking soda. B) Slaked lime. C) Milk of magnesia. D) Sulphuric acid. Show Answer Correct Answer: D) Sulphuric acid. 7. What colour does litmus paper turn when added to an alkali? A) Red. B) Blue. C) Green. D) Colourless. Show Answer Correct Answer: B) Blue. 8. Acids turn blue litmus ..... A) Black. B) Red. C) Green. D) None of the above. Show Answer Correct Answer: B) Red. 9. TOOTH DECAY IS CAUSED BY THE PRESENCE OF A BASE A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 10. What is the name for this acid HNO$_{2}$ A) Nitrous acid. B) Hydronitric acid. C) Nitric acid. D) Nitrate acid. Show Answer Correct Answer: A) Nitrous acid. 11. Cystine is the combination of A) Cystine-methionine. B) Methionine-serine. C) Cysteine-cysteine. D) None of the above. Show Answer Correct Answer: C) Cysteine-cysteine. 12. Are bee stinks acids or alkalis? A) Acids. B) Alkalis. C) All the above. D) None of the above. Show Answer Correct Answer: A) Acids. 13. As the number of hydrogen ions (H$^{+}$) decreases, the pH ..... A) Increases. B) Decreases. C) Stays the same. D) None of the above. Show Answer Correct Answer: A) Increases. 14. If you wanted to test a colourless and odourless substance at home, what household item could you use? A) Water. B) Red cabbage water. C) Bleach. D) Vinegar. Show Answer Correct Answer: B) Red cabbage water. 15. Name the acid:HC$_{2}$H$_{3}$O$_{2}$ A) Acetous Acid. B) Hydrogen Dicarbon Trihydrogen Dioxygen. C) Acetic Acid. D) Hydrogen Acetate. Show Answer Correct Answer: C) Acetic Acid. 16. When naming binary acids, the ending always changes to: A) -ate. B) -ous. C) -ic. D) -ite. Show Answer Correct Answer: C) -ic. 17. What is the role of enzymes? A) Catalyze Reactions. B) Makes RNA. C) Copy DNA. D) Transport Molecules. Show Answer Correct Answer: A) Catalyze Reactions. 18. Which of the following acids is a strong acid? A) 0.5 M CH$_{3}$COOH(aq). B) 12 M CH$_{3}$COOH(aq). C) 1 M CH$_{3}$COOH(aq). D) 0.01 M HCl(aq). Show Answer Correct Answer: D) 0.01 M HCl(aq). 19. The difference between tertiary and quartenary structure is: A) Tertiary structure is water-soluble whereas quartenary structure is lipid soluble. B) Tertiary structure consists of one polypeptide chain whereas quartenary structure consists of more than one polypeptide chains. C) Tertiary structure is fibrous whereas quartenary structure is globular. D) Tertiary structure has double bond whereas quartenary structure does not have double bond. Show Answer Correct Answer: B) Tertiary structure consists of one polypeptide chain whereas quartenary structure consists of more than one polypeptide chains. 20. What are Nucleic Acids made up of? A) Carbon, Hydrogen, Oxygen, and Nitrogen. B) Carbon, Hydrogen, Oxygen, Nitrogen, and sometimes sulfur. C) Carbon Hydrogen, Oxygen, Nitrogen, and Phosphate. D) Carbon, Hydrogen, and Oxygen. Show Answer Correct Answer: C) Carbon Hydrogen, Oxygen, Nitrogen, and Phosphate. 21. What is the shape of DNA? A) Paraolic. B) Double Hyperbola. C) Double Helix. D) Linear. Show Answer Correct Answer: C) Double Helix. 22. Acids are ..... in taste A) Tasteless. B) Sweet. C) Bitter. D) Sour. Show Answer Correct Answer: D) Sour. 23. What is gastric acid present in the stomach composed of? A) Hydrochloric acid. B) Nitric acid. C) Sulphuric acid. D) Lactic acid. Show Answer Correct Answer: A) Hydrochloric acid. 24. Lime water is ..... in nature. A) Acidic. B) Basic. C) Neutral. D) Both acidic and basic. Show Answer Correct Answer: B) Basic. 25. The nature of vinegar is A) Salt. B) Basic. C) Acidic. D) Neutral. Show Answer Correct Answer: C) Acidic. 26. In oil hydrophobic nonpolar amino acids will A) Move to the inside of the protein. B) Group together. C) Effectively dissolve. D) Move to the outside of the protein. Show Answer Correct Answer: C) Effectively dissolve. 27. Water soluble alkali is called. A) Acid. B) Neutral. C) Alkalient. D) Alkali. Show Answer Correct Answer: C) Alkalient. 28. Sabrina applied calamine solution, when an ant bit her. This is an example of ..... A) Neutralization Reaction. B) Indication. C) Antacidation Reaction. D) Saltation Reaction. Show Answer Correct Answer: A) Neutralization Reaction. 29. Since some acids seemingly "eat away" certain substances, acids are ..... A) Corrosive. B) Bitter. C) Sliipery. D) Weak. Show Answer Correct Answer: A) Corrosive. 30. Williams collected a rain sample and measured its pH to be 5.6. What does this mean? A) The rain water is a weak base. B) The rain water is neutral. C) The rain water is a weak acid. D) The rain water is a strong acid. Show Answer Correct Answer: C) The rain water is a weak acid. 31. What anion is in phosphoric acid? A) H$^{+}$. B) $ _ {4} $$^{-3} $. C) $ _ {3} $$^{-3} $. D) P$^{-3}$. Show Answer Correct Answer: B) $ _ {4} $$^{-3} $. 32. Gypsum Technical Formula ..... A) Case $ _ {4} $ 5 h $ _ {2} $ o. B) Case $ _ {4} $ h $ _ {2} $ o. C) Case $ _ {4} $ 1/2 h $ _ {2} $ o. D) Case $ _ {4} $ 2 h $ _ {2} $ o. Show Answer Correct Answer: D) Case $ _ {4} $ 2 h $ _ {2} $ o. 33. What is the chemical formula of sulphuric acid? A) H2SO4. B) SO4. C) So. D) H24S. Show Answer Correct Answer: A) H2SO4. 34. Phenophthalein has ..... colur in basic solution. A) Red. B) Green. C) Yellow. D) Pink. Show Answer Correct Answer: D) Pink. 35. Copper oxide + hydrochloric acid $\rightarrow$ A) Copper chloride and water. B) Copper hydroxide and chlorine. C) Copper chloride. D) Copper chloride and hydrogen. Show Answer Correct Answer: A) Copper chloride and water. 36. Identify some foods you eat that you know are high in protein. A) Strawberries. B) Peanuts. C) Meat. D) Water. Show Answer Correct Answer: C) Meat. 37. HCl dissolved in methylbenzene reacts with magnesium to give hydrogen. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 38. According to Bronsted-Lowry, what does a base do? A) It produces OH$^{-}$ in water. B) It accepts a proton (H$^{+}$). C) It produces H$^{+}$ in water. D) It donates a proton (H$^{+}$). Show Answer Correct Answer: B) It accepts a proton (H$^{+}$). 39. Which of the following is an example of indicator in labs. A) Vinegar. B) Turmeric. C) Phenolphthelene. D) Hibiscus paper. Show Answer Correct Answer: C) Phenolphthelene. 40. When we suffer from acidity, we should take A) Antacid. B) Vitamins. C) Lactocalamine. D) Iron tonic. Show Answer Correct Answer: A) Antacid. 41. Which one of these is an example of an acid? A) Bleach. B) Hand soap. C) Sodium hydroxide. D) Lemon juice. Show Answer Correct Answer: D) Lemon juice. 42. Which substances helped you decide whether or not another substance was an acid or not? A) Salt and pepper. B) Soap and water. C) Baking soda and the purple (black bean) liquid. D) Mustard and soy sauce. Show Answer Correct Answer: C) Baking soda and the purple (black bean) liquid. 43. Acid are a ..... Conductor of Electricity A) Average. B) Inferior. C) Bad. D) Good. Show Answer Correct Answer: D) Good. 44. The colour of litmus in sulfuric acid is: A) Purple. B) Red. C) Blue. D) Green. Show Answer Correct Answer: B) Red. 45. Which among the following is not a property of acids? A) Corrosive in nature. B) Turn blue litmus red. C) PH is 7. D) Conduct electricity. Show Answer Correct Answer: C) PH is 7. 46. Name the acid that is present in fats in our body. A) Oxalic acid. B) Formic acid. C) Methyl orange. D) Fatty acid. Show Answer Correct Answer: D) Fatty acid. 47. The esophagus is the tube that connects the mouth to the stomach. Heartburn occurs when some of the stomach juices flow backwards up the esophagus. To help relieve heartburn, a person should take medicine that is A) Acidic or basic. B) Neutral. C) Acidic. D) Basic. Show Answer Correct Answer: D) Basic. 48. When the pH of your pool is too high, algae and bacteria can flourish, what do you need to add to lower it A) Chlorine. B) Hydrochloric acid. C) Sodium carbonate. D) Salt (e.g. sodium chloride). Show Answer Correct Answer: B) Hydrochloric acid. 49. Most foods would be considered A) Bases. B) Acids. C) Neutral. D) None of the above. Show Answer Correct Answer: B) Acids. 50. What sugar is found in RNA? A) Deoxyribose. B) Glucose. C) Ribose. D) Galactose. Show Answer Correct Answer: C) Ribose. 51. These acids are correctly matched with its system in human body, except: A) Hydrochloric acid-digestive system. B) Lactic acid-circulatory system. C) Uric acid-excretory system. D) None of the above. Show Answer Correct Answer: B) Lactic acid-circulatory system. 52. Nitric acid reacts with metals to make which type of salt? A) Knitting patterns. B) Nitrite. C) Nitrate. D) Nitroxide. Show Answer Correct Answer: C) Nitrate. 53. Are both acids and alkalis corrosive? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 54. Lead (II) phosphate A) Pb$_{3}$(PO$_{4}$)$_{2}$. B) PB2 ($ _ {4} $) $ _ {3} $. C) PbPO$_{4}$. D) Pb$_{2}$PO$_{4}$. Show Answer Correct Answer: A) Pb$_{3}$(PO$_{4}$)$_{2}$. 55. Barium hydroxide A) Baoh. B) Strongly. C) Ba (oh) 2. D) None of the above. Show Answer Correct Answer: C) Ba (oh) 2. 56. Name the following acid:HBr A) Hydrobromic acid. B) Hydrobromous acid. C) Bromous acid. D) Bromic acid. Show Answer Correct Answer: A) Hydrobromic acid. 57. Which is a natural indicator A) Naoh. B) Sulpher. C) Litmus. D) Phenoptyalin. Show Answer Correct Answer: C) Litmus. 58. What is an Arrhenius acid? A) A substance that produces H+ in water. B) A substance that produces OH-in water. C) All the above. D) None of the above. Show Answer Correct Answer: A) A substance that produces H+ in water. 59. Acids are of two types A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 60. Human blood has a pH of between 7.38 and 7.42. This means that the blood is ..... A) Very acidic. B) Slightly basic. C) Very basic. D) Slightly acidic. Show Answer Correct Answer: B) Slightly basic. ← 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