This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 13 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When more water is added to an acid it is ..... A) Diluted. B) Concentrated. C) Normal. D) None of the above. Show Answer Correct Answer: A) Diluted. 2. Pure sulphuric acid changes blue litmus paper red. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 3. Binary acids start with the prefix " ..... " A) Acid. B) Nitric. C) Hydraulic. D) Hydro. Show Answer Correct Answer: D) Hydro. 4. A reaction that does NOT contribute to acid rain is A) Sulphur trioxide + water $\rightarrow$ sulphuric acid. B) Hydrochloric acid + sodium hydroxide $\rightarrow$ sodium chloride + water. C) Nitrogen dioxide + water $\rightarrow$ nitrous acid + nitric acid. D) Sulphur dioxide + water $\rightarrow$ sulphurous acid. Show Answer Correct Answer: B) Hydrochloric acid + sodium hydroxide $\rightarrow$ sodium chloride + water. 5. When acid react with Zinc, which gas is formed? A) Oxygen. B) Hydrogen. C) Carbon of Oxide. D) None of the above. Show Answer Correct Answer: B) Hydrogen. 6. Which of the following is an acid-base indicator? A) Vinegar. B) Baking soda. C) Turmeric. D) Lime water. Show Answer Correct Answer: C) Turmeric. 7. Name this acid with the formula HF A) Hydrofluoric acid. B) Hypofluoric acid. C) Hydrogen fluorine acid. D) Fluoric acid. Show Answer Correct Answer: A) Hydrofluoric acid. 8. How many amino acids are coded for by this sequence of nucleotides:ATG GGA ACT CCA A) 4. B) 2. C) 6. D) 12. Show Answer Correct Answer: A) 4. 9. Amino acids are ampholytes because they can function as either a(an): A) Acid or base. B) Neutral molecule or an ion. C) Polar or non polar molecule. D) Positive or negatively charged. Show Answer Correct Answer: A) Acid or base. 10. The pH of a solution is 2.0. What is the [OH$^{-}$] concentration? A) 1x10$^{-12}$M. B) 12 M. C) 1x10$^{-2}$M. D) 2 M. Show Answer Correct Answer: A) 1x10$^{-12}$M. 11. Alkalis feel ..... A) Rough. B) Granulated. C) Soapy. D) Smooth. Show Answer Correct Answer: C) Soapy. 12. The purple colour of cabbage ..... when it is dipped in an acid A) Turns red. B) Disappears. C) Turns black. D) Remains as t is. Show Answer Correct Answer: A) Turns red. 13. The name of acid in lemon juice is A) Ethanoic. B) Lemonic acid. C) Citric acid. D) Sulfuric acid. Show Answer Correct Answer: C) Citric acid. 14. A strong acid is an acid that is ..... A) 100% ionizes in water. B) An electrolyte. C) Both. D) Neither. Show Answer Correct Answer: C) Both. 15. Which of the following is not the properties of alkalis? A) Slipery. B) Have a pH less than 7. C) The pH scale of alkalis from 8-14. D) Corrosive. Show Answer Correct Answer: B) Have a pH less than 7. 16. The pH of pure water A) 5.6. B) 7.0. C) 8.1. D) 0.0. Show Answer Correct Answer: B) 7.0. 17. Turns litmus red A) Acids. B) Bases. C) All. D) None of the above. Show Answer Correct Answer: A) Acids. 18. Lemon juice is an example of ..... A) A base. B) An acid. C) A neutral substance. D) None of the above. Show Answer Correct Answer: B) An acid. 19. What are 2 types of nucleic acids? A) Fatty Acids and Glycerol. B) DNA and RNA. C) Amino Acids and Enzymes. D) Monosaccharides and Polysaccharides. Show Answer Correct Answer: B) DNA and RNA. 20. If an acid is combined with a base of equal strength, the result will most likely be A) A neutral solution. B) A stronger acid. C) Impossible to tell without testing the pH. D) A stronger base. Show Answer Correct Answer: A) A neutral solution. 21. Dry HCl gas dhanges the colour of dry blue litmus A) Dry blue litmus. B) Dry red litmus. C) Both. D) None. Show Answer Correct Answer: D) None. 22. Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood? A) Strongly acidic. B) Slightly acidic. C) Strongly basic. D) Slightly basic. Show Answer Correct Answer: D) Slightly basic. 23. 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-Serine-Arginine-Serine. C) Leucine-Arginine-Serine-Arginine. D) Proline-Serine-Arginine-Proline. Show Answer Correct Answer: A) Proline-Serine-Arginine-Arginine. 24. Which of these pH values represent an acid? A) 4. B) 8. C) 10. D) 12. Show Answer Correct Answer: A) 4. 25. Bleaching Powder Formula ..... A) Caocl $ _ {2} $. B) NH$_{4}$Cl. C) Na$_{2}$CO$_{3}$. D) Na$_{2}$SO$_{4}$. Show Answer Correct Answer: A) Caocl $ _ {2} $. ← PreviousNext →Related 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 8Class 7 Science Chapter 4 Acids Quiz 9Class 7 Science Chapter 4 Acids Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books