This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Acids > Class 7 Science Chapter 4 Acids – Quiz 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 17 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Oxalic acids is present in A) Spinach. B) Grapes. C) Apples. D) Vinegar. Show Answer Correct Answer: A) Spinach. 2. Acid + base $\rightarrow$? A) Salt + carbon dioxide + water. B) Salt + hydrogen gas + water. C) Salt + water. D) Salt only. Show Answer Correct Answer: C) Salt + water. 3. ..... are examples of purine bases A) Adenine and Guanine. B) Thymine and Cytosine. C) Adenine only. D) Guanine only. Show Answer Correct Answer: A) Adenine and Guanine. 4. Two amino acids that contain sulfur atoms are: A) Cysteine and serine. B) Cysteine and threonine. C) Methionine and cysteine. D) Methionine and serine. Show Answer Correct Answer: C) Methionine and cysteine. 5. What type of paper is used to test for acids and bases? A) Red paper. B) Blue paper. C) Litmus paper. D) Lined paper. Show Answer Correct Answer: C) Litmus paper. 6. These kind of acids are natural ..... A) Organic. B) Mineral. C) All the above. D) None of the above. Show Answer Correct Answer: A) Organic. 7. 7 on the pH scale means that it is ..... A) Acidic. B) Basic. C) Neutral. D) None of the above. Show Answer Correct Answer: C) Neutral. 8. Antacids contain A) Strong base. B) Weak base. C) Weak acid. D) Strong acid. Show Answer Correct Answer: B) Weak base. 9. Value from 0-14 that determine the acidity of a solution A) Number line. B) PH scale. C) Acid. D) Base. Show Answer Correct Answer: B) PH scale. 10. When NaOH and HCl are mixed in equal molar quantities, the result is A) The formation of salt +H$_{2}$O. B) The formation of salt +H$_{2}$(g). C) The formation of salt +O$_{2}$(g). D) All above are correct. Show Answer Correct Answer: A) The formation of salt +H$_{2}$O. 11. Ammonia (NH$_{3}$) is a A) Strong base. B) Weak Acid. C) Weak Base. D) Strong Acid. Show Answer Correct Answer: C) Weak Base. 12. Which molecule brings the amino acid to the ribosome? A) TRNA. B) MRNA. C) RRNA. D) DNA. Show Answer Correct Answer: A) TRNA. 13. NaOH is a strong base.What is the pH of a 0.01 M NaOH soltuion? A) 9. B) 12. C) 14. D) 2. Show Answer Correct Answer: B) 12. 14. What does a pH scale do? A) Tells if a substance is an acid or base. B) Measures the strength and weakness of acids and bases. C) Both statements are correct. D) None of the above. Show Answer Correct Answer: C) Both statements are correct. 15. What is the chemical symbol for Sulfuric Acid A) H2SO4. B) Are. C) H4SO2. D) HS2O4. Show Answer Correct Answer: A) H2SO4. 16. Organic acids are A) Nice acids. B) Strong acids. C) Weak acids. D) Main acids. Show Answer Correct Answer: C) Weak acids. 17. Calcium hydroxide is found in A) Lime juice. B) Lime water. C) Window cleaner. D) Soap. Show Answer Correct Answer: B) Lime water. 18. Bases are what range on the pH scale? A) 7. B) 0-6.99. C) 0-14. D) 7.1-14. Show Answer Correct Answer: D) 7.1-14. 19. Metal carbonates react with acid to form A) Salt, carboxylic acid and water. B) Salt and carbonated water. C) Salt, carbon dioxide and water. D) Salt and hydrogen. Show Answer Correct Answer: C) Salt, carbon dioxide and water. 20. What is the formula for perchloric acid? A) HClO4. B) H$_{3}$ClO$_{3}$. C) H$_{3}$ClO$_{4}$. D) HCLO $ _ {3} $. Show Answer Correct Answer: A) HClO4. 21. A ..... is a substance that produces hydroxide ions, OH$^{-}$ when it dissolves in water. A) Hydronium Ion. B) Base. C) Basic anhydride. D) Acid. Show Answer Correct Answer: B) Base. 22. Which substance is avid? A) Ammonia. B) Soap. C) Vinegar. D) Toothpaste. Show Answer Correct Answer: C) Vinegar. 23. Baking Powder is ..... A) Baking Soda + Sodium Carbonate. B) Baking Soda + Mild acid. C) Baking Soda + Mild Base. D) Only Baking Soda. Show Answer Correct Answer: B) Baking Soda + Mild acid. 24. Acids react with A) Water to produce bases and salts. B) Salts to produce bases and water. C) Neither bases, salts nor water. D) Bases to produce salts and water. Show Answer Correct Answer: D) Bases to produce salts and water. 25. Hydrochloric acid + sodium hydroxide $\rightarrow$ sodium chloride + water A) This reaction is an oxidation reaction. B) This reaction is salty. C) This reaction is a combustion reaction. D) This reaction is a neutralisation reaction. Show Answer Correct Answer: D) This reaction is a neutralisation reaction. 26. Which is the stronger acids? A) PH 1. B) PH 13. C) PH 7. D) PH 8. Show Answer Correct Answer: A) PH 1. 27. Which pH levels indicated a strong acid? A) 8-11. B) 12-14. C) 1-3. D) 4-6. Show Answer Correct Answer: C) 1-3. 28. What type of paper is used to test acidity? A) Blue paper. B) Red paper. C) Lined paper. D) Litmus paper. Show Answer Correct Answer: D) Litmus paper. 29. When the pH of a solution becomes more basic, the number on the pH scale A) Increases. B) Stays the same. C) Triples. D) Decreases. Show Answer Correct Answer: A) Increases. 30. Sodium ethanoate (CH$_{3}$COONa) is a A) Strong Acid. B) Strong base. C) Weak Acid. D) Weak Base. Show Answer Correct Answer: D) Weak Base. 31. Washing soda has the formula A) We can. B) Na2CO3.7H2O. C) Na2CO3.10H2O. D) Na2CO3.H2). Show Answer Correct Answer: C) Na2CO3.10H2O. 32. What pH range would you get for an acid? A) 0-6. B) 7-14. C) 2-10. D) 7. Show Answer Correct Answer: A) 0-6. 33. Which one of these have the highest pH level? A) Milk. B) Vinegar. C) Stomach acid. D) None of the above. Show Answer Correct Answer: C) Stomach acid. 34. Which of the following solutions has the lowest pH? A) 1 M HCl(aq). B) 1 m NaOH (aq). C) 1 M NH$_{3}$(aq). D) 1 M CH$_{3}$COOH(aq). Show Answer Correct Answer: A) 1 M HCl(aq). 35. What determines the number of hydrogens in your acid? A) Magic. B) Its the same as the charge of the anion. C) There are always just one. D) Its the same as the charge of hydrogen. Show Answer Correct Answer: B) Its the same as the charge of the anion. 36. Which is not a essential amino acid A) Alanine. B) Arginine. C) Methionine. D) Lysine. Show Answer Correct Answer: A) Alanine. 37. Calcium hydroxide is a A) Base. B) Indicator. C) Acid. D) Salt. Show Answer Correct Answer: A) Base. 38. When using your codon chart, what sequence can you use to find the correct amino acid? A) DNA. B) TRNA. C) MRNA. D) Any of these will do. Show Answer Correct Answer: C) MRNA. 39. Name the acid present in sting of an ant. A) Phenolphthalein. B) Formic acid. C) Citric acid. D) Hydrochloric acid. Show Answer Correct Answer: B) Formic acid. 40. Which nucleic acid only exists in the nucleus? A) RRNA. B) MRNA. C) DNA. D) TRNA. Show Answer Correct Answer: C) DNA. 41. Water-soluble alkali is called this A) Neutral. B) Acid. C) Alkalient. D) Alkaline. Show Answer Correct Answer: C) Alkalient. 42. How can you make a dull penny shiny? A) Dip it in vinegar. B) Wash it with soapy water. C) Put it in salt and water. D) Dip it in a vinegar and salt solution. Show Answer Correct Answer: D) Dip it in a vinegar and salt solution. 43. Monomers of a protein are connected by ..... bonds. A) Hydrogen. B) Covalent. C) Peptide. D) Ionic. Show Answer Correct Answer: C) Peptide. 44. Measure of how acidic or basic something is. A) Hp. B) AH. C) PH. D) BH. Show Answer Correct Answer: C) PH. 45. Acid in vinegar: A) Hydrochloric acid. B) Sulfuric acid. C) Carbonic acid. D) Acetic acid. Show Answer Correct Answer: D) Acetic acid. 46. 2-propanol heated with conc. H$_{2}$SO$_{4 }$produced A) Propanoic acid. B) Propene. C) Propanal. D) Propane. Show Answer Correct Answer: B) Propene. 47. A base has a ..... A) Positive ion. B) PH of 5. C) Sour taste. D) Slippery feel. Show Answer Correct Answer: D) Slippery feel. 48. When red ants bites it inject ..... acid A) Formic acid. B) Acetic acid. C) Hydrogen peroxide. D) Benzoic acid. Show Answer Correct Answer: A) Formic acid. 49. Use your codon chart to answer the following question:UAU ACG GCU CCAWhat is the sequence of amino acids that will be translated from the mRNA above? A) Tyrosine-alanine-proline-threonine. B) Tyrosine-proline-alanine-threonine. C) Tyrosine-threonine-alanine-proline. D) Threonine-tyrosine-alanine-proline. Show Answer Correct Answer: C) Tyrosine-threonine-alanine-proline. 50. What is the formula for phosphoric acid? A) H$_{3}$PO$_{4}$. B) HPO $ _ {3} $. C) H$_{2}$PO$_{4}$. D) H$_{3}$PO$_{3}$. Show Answer Correct Answer: A) H$_{3}$PO$_{4}$. 51. A neutralisation reaction produces A) An acid. B) A neutral substance. C) Only water. D) Salt and water. Show Answer Correct Answer: D) Salt and water. 52. Which of the following statements about a dilute aqueous solution of strong acid is correct? A) It is a strong electrolyte. B) It has a pH value of 1. C) It is very sour. D) It reacts with all metals. Show Answer Correct Answer: A) It is a strong electrolyte. 53. Aromatic amino acids include A) Spray, Tyrosine & Tryptophan. B) Phenyl alanine, tyrosine & tryptophan. C) Phenyl alanine, serine & tryptophan. D) Threonine, tyrosine & tryptophan. Show Answer Correct Answer: B) Phenyl alanine, tyrosine & tryptophan. 54. Which of these is a property of acidic solutions? A) They feel slippery. B) They taste sour. C) They taste bitter. D) They are in many cleaning products. Show Answer Correct Answer: B) They taste sour. 55. The Dependent variable is graphed on the A) Y axis. B) D axis. C) X axis. D) You can't graph it. Show Answer Correct Answer: A) Y axis. 56. What is the name of HCN? A) Cyanic acid. B) Hydrogen cyanide acid. C) Hydrocyanide acid. D) Hydrocyanic acid. Show Answer Correct Answer: D) Hydrocyanic acid. 57. The anion part in this H$_{2}$PO$_{4}$ acid is A) Nitrate ion. B) Phosphite ion. C) Phosphate ion. D) Nitrous ion. Show Answer Correct Answer: C) Phosphate ion. 58. Fill in the blank:- ..... shows no change in colour when added to a neutral substance. A) Litmus Paper. B) Phenolphthalein. C) Methyl Orange. D) All of these. Show Answer Correct Answer: D) All of these. 59. When the pH Scale is on 5, the Nature of the substance is- A) Neutral. B) Acidic. C) Basic. D) None of the Above. Show Answer Correct Answer: B) Acidic. 60. Acids present in plants and animals are called ..... A) Mineral Acids. B) Organic Acids. C) Dilute Acids. D) None of the above. Show Answer Correct Answer: B) Organic Acids. ← 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