This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 15 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Acidic foods can be identified by what taste? A) Salty. B) Sour. C) Bitter. D) Sweet. Show Answer Correct Answer: B) Sour. 2. The chirality of an amino acid results from the fact that its a carbon that: A) Has no net charge. B) Is a carboxylic acid. C) Is bonded to 4 different chemical groups. D) Is symmetric. Show Answer Correct Answer: C) Is bonded to 4 different chemical groups. 3. Use the CODON CHART to answer the following question.Which of these codons would NOT result in the production of a protein being stopped? A) UAA. B) Than the. C) UAG. D) UGG. Show Answer Correct Answer: D) UGG. 4. Acids have a pH range of A) 0-14. B) 1-6.9. C) 7. D) 7.1-14. Show Answer Correct Answer: B) 1-6.9. 5. (I) Carboxylic acid with 10 carbon is called decanoic acid(II) Carboxylic acid with 5 carbon is called valeraldehyde A) Statement (I) is true but statement (II) is false. B) Statement (I) is false but statement (II) is true. C) Both statement (I) and (II) are false. D) Both statement (I) and (II) are true. Show Answer Correct Answer: A) Statement (I) is true but statement (II) is false. 6. Lemon drop turns A) Red litmus into blue. B) No reaction. C) Blue Litmus into red. D) All of them. Show Answer Correct Answer: C) Blue Litmus into red. 7. Which of the following pH values would be the strongest acid? A) 1. B) 3. C) 4. D) 6. Show Answer Correct Answer: A) 1. 8. The end result of amino acids joining together in translation is a ..... A) Polysaccharide. B) Protein. C) DNA. D) RNA. Show Answer Correct Answer: B) Protein. 9. Which latin word means sour? A) Acidic. B) Acre. C) Acid. D) Aculous. Show Answer Correct Answer: B) Acre. 10. Magnesium + Hydrochloric acid $\rightarrow$ ..... + ..... A) Magnesium chloride + water. B) Magnesium hydrochlorite + hydrogen. C) Magnesium chloride + hydrogen. D) Carbon dioxide + water + magnesium chloride. Show Answer Correct Answer: C) Magnesium chloride + hydrogen. 11. Hydrogen gas was first identified by A) Henry Cavendish. B) Lavoisier. C) Michel Faraday. D) Issac Newton. Show Answer Correct Answer: A) Henry Cavendish. 12. When a protein unfolds, it is A) Denatured. B) Building. C) Adding amino acids. D) Making food. Show Answer Correct Answer: A) Denatured. 13. Bases feel slippery to the touch. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 14. Bases can be referred to as: A) None of the choices. B) Proton acceptors. C) Proton donors. D) Protons. Show Answer Correct Answer: B) Proton acceptors. 15. A group of three nucleotides that translate to an amino acid is called a(n) A) Dictionary. B) Initiator. C) Codon. D) Uncodon. Show Answer Correct Answer: C) Codon. 16. Bleaching powder gives smell of chlorine because it- A) Is unstable. B) Gives chlorine on exposure to atmosphere. C) Is a mixture of chlorine and slaked lime. D) Contains excess of chlorine. Show Answer Correct Answer: B) Gives chlorine on exposure to atmosphere. 17. Phosphorus trichloride A) KCl$_{3}$. B) PCl$_{3}$. C) K$_{3}$Cl. D) P$_{3}$Cl. Show Answer Correct Answer: B) PCl$_{3}$. 18. What is the pH of blood? A) 7.0. B) 7.4. C) 7.8. D) 8.0. Show Answer Correct Answer: B) 7.4. 19. These acids originated from plants except: A) Citric acid. B) Hydrochloric acid. C) Tartaric acid. D) Ascorbic acid. Show Answer Correct Answer: B) Hydrochloric acid. 20. Building blocks of nucleic acid are A) Nitrogen bases. B) Nucleoside. C) Nucleotide. D) Amino acid. Show Answer Correct Answer: C) Nucleotide. 21. HF is ..... A) An acid. B) A base. C) A salt. D) An ionic compound. Show Answer Correct Answer: A) An acid. 22. How does acid tastes A) Sweet. B) Bitter. C) Salty. D) Sour. Show Answer Correct Answer: D) Sour. 23. An acid commonly added to food items A) Acetic acid. B) Hydrochloric acid. C) Carbonic acid. D) None of the above. Show Answer Correct Answer: A) Acetic acid. 24. When do you take an Antacid? A) When you are Hungry. B) When the soil is too Acidic. C) When you have a Gastric problem in your stomach. D) When the Factory wastes are disposed in waterbodies. E) None of the Above. Show Answer Correct Answer: C) When you have a Gastric problem in your stomach. 25. What is the pH of a solution where the [H+] is 1.0 x 10$^{-11}$? A) 11. B) 13. C) 14. D) 1. Show Answer Correct Answer: A) 11. ← 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