This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 37 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 37 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Acids are of two types A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 2. Human blood has a pH of between 7.38 and 7.42. This means that the blood is ..... A) Very acidic. B) Slightly acidic. C) Very basic. D) Slightly basic. Show Answer Correct Answer: D) Slightly basic. 3. 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. 4. A solution of pH 3 is mixed with a solution of pH 9. The final pH could be A) 2. B) 6. C) 10. D) 12. Show Answer Correct Answer: B) 6. 5. 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. 6. The conjugate acid of HCO$_{3}$$^{-}$is ..... and the conjugate base of HCO$_{3}$$^{-}$ is ..... A) H $ _ {2} $ co $ _ {3} $;CO $ _ {3} $$^{-2} $. B) CO $ _ {3} $$^{-2} $;CO $ _ {3} $$^{-2} $. C) H $ _ {2} $ co $ _ {3} $;H $ _ {2} $ of. D) H $ _ {2} $ O;H $ _ {2} $ co $ _ {3} $. Show Answer Correct Answer: A) H $ _ {2} $ co $ _ {3} $;CO $ _ {3} $$^{-2} $. 7. Contains a methyl group as side chain A) Histidine. B) Glycine. C) Alanine. D) Proline. Show Answer Correct Answer: C) Alanine. 8. Could C$_{2}$H$_{3}$O$_{2}$$^{-}$act as a base when placed in water? A) Yes, because it can accept a H$^{+}$. B) Yes, because it can donate a H$^{+}$. C) No, because it cannot donate a H$^{+}$. D) No, because it cannot accept a H$^{+}$. Show Answer Correct Answer: A) Yes, because it can accept a H$^{+}$. 9. 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. 10. YOU NEED YOUR CODON CHART!mRNA:GGACCUAUUCAGThe DNA sequence for the mRNA above is? A) CCUGGAUAAGUC. B) CCTGGATAAGTC. C) GGACCTATTCAG. D) GGACCUAUUCAG. Show Answer Correct Answer: B) CCTGGATAAGTC. 11. Which of the following ctric acid A) Mango. B) Orange. C) Tamarind. D) None of the above. Show Answer Correct Answer: B) Orange. 12. 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. 13. Which of the following best describes a bronsted-Lowry base? A) Donates hydroxide (OH-) ion. B) Donates hydrogen (H+). C) Accepts protons (H+). D) Donates protons (H+). Show Answer Correct Answer: C) Accepts protons (H+). 14. 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) Is a base. B) Has a neutral pH. C) Is an acid. D) Does not have a pH. Show Answer Correct Answer: A) Is a base. 15. 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-alanine-isoluecine. C) Serine-alanine-phenlylalanine-isoluecine. D) Serine-phenlylalanine-isoluecine-arginine. Show Answer Correct Answer: A) Serine-phenlylalanine-isoluecine-alanine. 16. 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. 17. What color does bases turn litmus paper? A) It turns litmus paper purple. B) It turns blue litmus paper red. C) It turns red litmus paper blue. D) It turns red litmus paper re. Show Answer Correct Answer: C) It turns red litmus paper blue. 18. When acid is added in litmus paper it turns ..... A) Yellow. B) Red. C) Blue. D) Green. Show Answer Correct Answer: B) Red. 19. The substance that does the dissolving in a mixture. A) Mixture. B) Solute. C) Solvent. D) Solution. Show Answer Correct Answer: C) Solvent. 20. ACID + BASE A) MILK. B) INDICATOR. C) LIME + WATER. D) SALT + WATER. Show Answer Correct Answer: D) SALT + WATER. 21. All numbers in science A) Are over 10. B) Start at one. C) Need a unit of measurement. D) There are no numbers in science. Show Answer Correct Answer: C) Need a unit of measurement. 22. RNA contains the sugar ..... A) Dexoxyribose. B) Glucose. C) Within limits. D) Lipids. Show Answer Correct Answer: C) Within limits. 23. Common Name of Calcium sulphate is A) Calcium Carbonate. B) Baking soda. C) Sodium Carbonate. D) Gypsum. Show Answer Correct Answer: D) Gypsum. 24. What is the name of H$_{3}$PO$_{4}$? A) Hydrophosphoric acid. B) Phosphorous acid. C) Phosphoric acid. D) Phosphoric hydroxide. Show Answer Correct Answer: C) Phosphoric acid. 25. 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} $. ← 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