This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 38 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 38 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. WINDOW CLEANER CAN BE FOUND IN ..... A) CALCIUM HYDROXIDE. B) AMMONIUM HYDROXIDE. C) LACTIC ACID. D) OXALIC ACID. Show Answer Correct Answer: B) AMMONIUM HYDROXIDE. 2. What is the pH scale? A) Unit of measurement for Acids. B) Unit of measurement for amount of electrons. C) Unit of maesurement for Acids. D) Unit of measurement for temperature. Show Answer Correct Answer: A) Unit of measurement for Acids. 3. A solution turned red litmus into blue.Its pH value ..... A) 10. B) 5. C) 4. D) 1. Show Answer Correct Answer: A) 10. 4. The DNA sequence T A C C G T A G A G G C would produce which of the following amino acid sequences? A) Met-Val-ASP-PRO. B) Met-Ala-Ser-Pro. C) Val-His-Arg-Glu. D) Glu-Light-Ser-Leu. Show Answer Correct Answer: B) Met-Ala-Ser-Pro. 5. Phosphoric acid (a) A) A. H3PO4. B) H$_{3}$PO$_{3}$. C) H$_{3}$P. D) H$_{3}$PO$_{2}$. Show Answer Correct Answer: A) A. H3PO4. 6. Nitric acid is present in vinegar A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 7. Which of the following is INCORRECT for an acid? A) Sour taste. B) PH is less than 7. C) Turn red litmus solution blue. D) Must contain H in the formula. Show Answer Correct Answer: C) Turn red litmus solution blue. 8. A solution has no effect on red litmus paper. It has to be one of the following substances. Which one is it? A) Soap solution. B) Sodium hydroxide solution. C) Sodium chloride solution. D) Potassium hydroxide solution. Show Answer Correct Answer: C) Sodium chloride solution. 9. Acids turn red litmus paper blue. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 10. Nitric acid reacts with sodium hydroxide solution to form a salt and water. Which of the following is the correct word equation? A) Nitric acid + sodium hydroxide + water. B) Nitric acid + sodium hydroxide $\rightarrow$ sodium nitrate + water. C) Salt + water $\rightarrow$ nitric acid + sodium hydroxide. D) Sodium nitrate + water $\rightarrow$ nitric acid + sodium hydroxide. Show Answer Correct Answer: B) Nitric acid + sodium hydroxide $\rightarrow$ sodium nitrate + water. 11. When an acid and a base are mixed, what is the reaction called? A) Neutralization. B) Hydrolyzed. C) Hydro Ionization. D) A salt and a water reaction. Show Answer Correct Answer: A) Neutralization. 12. Any number on the pH scale greater than 7 is considered a? A) Base. B) Lucky. C) Phancy. D) Classic. Show Answer Correct Answer: A) Base. 13. The ..... acid stores information about our body. A) Amino. B) Nitric. C) Hemoglobin. D) Deoxyribonucleic. E) DNA. Show Answer Correct Answer: D) Deoxyribonucleic. 14. Which of the following is NOT a strong base? A) NaOH. B) RBOH. C) Al(OH)$_{3}$. D) Ca (oh) $ _ {2} $. Show Answer Correct Answer: C) Al(OH)$_{3}$. 15. What happens when sodium hydroxide solution is poured on red litmus paper? A) Red litmus remains red. B) Red litmus turns blue. C) Red litmus turns blue and then white. D) Red litmus turns yellow. Show Answer Correct Answer: B) Red litmus turns blue. 16. Phenyl isothiocyanate is used in A) Sanger's method. B) Edman's method. C) Hydrizinalysis. D) None of the above. Show Answer Correct Answer: B) Edman's method. 17. Nitrogen base + sugar + phosphate forms A) Nucleotide. B) Nucleoside. C) Nitrogen base pairs. D) Double helix. Show Answer Correct Answer: A) Nucleotide. 18. An arrhenius acid A) Produces hydroxide ions in a solution. B) Is a proton donor. C) Produces hydrogen ions in a solution. D) Is a proton acceptor. Show Answer Correct Answer: C) Produces hydrogen ions in a solution. 19. What is an acid? A) A chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus paper red. B) Has a pH of 11. C) Has a pH of 7. D) None of the above. Show Answer Correct Answer: A) A chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus paper red. 20. Which of the following is a carbonate? A) Zinc. B) Aluminum. C) Vinegar. D) Marble. Show Answer Correct Answer: D) Marble. 21. Methyl Orange Index Color ..... A) Yellow. B) Orange. C) Red. D) Green. Show Answer Correct Answer: A) Yellow. 22. A proton or H$^{+}$ (hydrogen ion) forms what type of bond with water to form a hydronium ion H$_{3}$O$^{+}$ A) Ionic bond. B) Coordinate covalent bond. C) Covalent bond. D) Network bond. Show Answer Correct Answer: B) Coordinate covalent bond. 23. Feels slippery. A) Acids. B) Bases. C) All. D) None of the above. Show Answer Correct Answer: B) Bases. 24. Three acidic solutions A, B and C have pH = 0, 3 and 5 respectively. Which solution has the highest concentration of H+ ions? A) A. B) B. C) C. D) Don't know. Show Answer Correct Answer: A) A. 25. Which of the following is a pH for a strong base? A) 1. B) 8. C) 7. D) 13. Show Answer Correct Answer: D) 13. ← 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