This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 11 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 11 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A common alkali used in the lab is A) Hydrochloric acid. B) Sodium chloride. C) Hydrogen sulphate. D) Sodium hydroxide. Show Answer Correct Answer: D) Sodium hydroxide. 2. How many amino acids does your body use to build proteins? A) 40. B) 25. C) 20. D) 15. Show Answer Correct Answer: C) 20. 3. Which of the following acids is found in vinegar? A) Citric acid. B) Acetic acid. C) Lactic acid. D) Tartaric acid. Show Answer Correct Answer: B) Acetic acid. 4. Which of the following is an acid? A) Vinegar. B) Bleach. C) Sugar in water. D) Starch in water. E) Toothpaste in water. Show Answer Correct Answer: A) Vinegar. 5. Which of the following is a common property of acids? A) They taste bitter. B) They feel slippery. C) They turn blue litmus paper red. D) They have a pH greater than 7. Show Answer Correct Answer: C) They turn blue litmus paper red. 6. What is the sequence of amino acids that will be translated from the mRNA below? 5' GCU AUA UAG AGG 3' A) Aspartic Acid-Isoleucine-Stop. B) Alanine-Isoleucine-Stop. C) Alanine-Isoleucine-Stop-Arginine. D) Aspartic Acid-Isoleucine-Stop. Show Answer Correct Answer: B) Alanine-Isoleucine-Stop. 7. What is a codon? A) A protein that combine with DNA molecules to form nucleosomes. B) A determinant of characteristics in living organisms. C) Made up of three nitrogenous bases that codes for an amino acid. D) None of the above. Show Answer Correct Answer: C) Made up of three nitrogenous bases that codes for an amino acid. 8. Haleema 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. 9. CALAMIINE SOLUTION CONTAINS ..... A) LIME WATER. B) ZINC CARBONATE. C) FORMIC ACID. D) None of the above. Show Answer Correct Answer: B) ZINC CARBONATE. 10. Which formula represents a hydroxide ion? A) H$_{3}$O$^{+}$. B) OH$^{-}$. C) NH$_{4}$$^{+}$. D) HCO$_{3}$$^{-}$. Show Answer Correct Answer: B) OH$^{-}$. 11. Neutralization is a reaction between A) Two acids. B) Two bases. C) One acid and one base. D) None of them. Show Answer Correct Answer: C) One acid and one base. 12. A food that contains all 9 essential amino acids A) Globular proteins. B) Complete proteins. C) Fibrous proteins. D) Whey. Show Answer Correct Answer: B) Complete proteins. 13. A substance with a pH of 7 is which of the following? A) Acid. B) Base. C) Neutral. D) None of the above. Show Answer Correct Answer: C) Neutral. 14. How do acids taste A) Sweet. B) Salty. C) Sour. D) Spicy. Show Answer Correct Answer: C) Sour. 15. Turns litmus blue. A) Acids. B) Bases. C) Salts. D) All. Show Answer Correct Answer: B) Bases. 16. Which of the following solutions has the lowest electrical conductivity? (All solutions are of the same concentration.) A) Ethanoic acid. B) Sulphuric acid. C) Sodium hydroxide. D) Sodium chloride. Show Answer Correct Answer: A) Ethanoic acid. 17. Chemical formula of baking soda is- A) NaHCO $ _ {3} $. B) Naco $ _ {3} $. C) MgSO$_{4}$. D) MgCO$_{3}$. Show Answer Correct Answer: A) NaHCO $ _ {3} $. 18. The acid present in tamarind is A) Oxalic acid. B) Tartaric acid. C) Formic acid. D) Acetic acid. Show Answer Correct Answer: B) Tartaric acid. 19. One prominent feature of DNA is its ..... -helix structure. A) Single. B) Double. C) Triple. D) None. Show Answer Correct Answer: B) Double. 20. Another name for inorganic acids is A) Dangerous acids. B) Strong acids. C) Ignorable acids. D) Mineral acids. Show Answer Correct Answer: D) Mineral acids. 21. H$_{2}$SO$_{4, }$HCl and HNO$_{3 are generally known as ..... acids }$ A) Mineral. B) Edible. C) Natural. D) Organic. Show Answer Correct Answer: A) Mineral. 22. Acids increase the concentration of what in water? A) H$^{+}$ ions. B) Hydrate ions. C) Hydroxide ions. D) OH$^{-}$ ions. Show Answer Correct Answer: A) H$^{+}$ ions. 23. Which chemical is called baking soda? A) Sodium chloride. B) Sodium hydroxide. C) Sodium bicarbonate. D) Sodium carbonate. Show Answer Correct Answer: C) Sodium bicarbonate. 24. What is the chemical formula for hydroxide? A) H$_{3}$O$^{+}$. B) H$_{3}$O$^{-}$. C) OH$^{+}$. D) OH-. Show Answer Correct Answer: D) OH-. 25. Is the following compound an acid or a base?NH$_{4}$OH A) Acid. B) Base. C) All the above. D) None of the above. Show Answer Correct Answer: B) Base. ← 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