This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 18 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 18 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The higher the concentration of negative (hydroxide) ions in the solution, the stronger the base is. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 2. Bases have many uses. They are mainly used to make A) Cleaning products. B) Soaps. C) Concrete. D) All of the answer choices. Show Answer Correct Answer: D) All of the answer choices. 3. Metal oxides are generally A) Acidic in nature. B) Basic in nature. C) Neutral. D) Some may be acidic some may be basic. Show Answer Correct Answer: B) Basic in nature. 4. Chloric acid A) HCLO $ _ {3} $. B) Hclo $ _ {2} $. C) HCLO. D) HCl. Show Answer Correct Answer: A) HCLO $ _ {3} $. 5. A substance with a pH of 11 is which of the following? A) Acid. B) Base. C) Neutral. D) None of the above. Show Answer Correct Answer: B) Base. 6. Vinegar is a base. 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 a property of a base? A) Bitter button. B) Reacts with metals. C) Salty. D) Sour taste. Show Answer Correct Answer: A) Bitter button. 8. Acids change the colour of methyl orange to A) Amber. B) Pink. C) Yellow. D) Red. Show Answer Correct Answer: C) Yellow. 9. Foods that are short of one or more of the essential amino acids A) Aldehydes. B) Maillard reaction. C) Complete protein. D) Incomplete protein. Show Answer Correct Answer: D) Incomplete protein. 10. Which of the foll is not mineral acid A) HCL. B) H2SO4. C) HNI3. D) Citric acid. Show Answer Correct Answer: D) Citric acid. 11. Which of these is not an acid? A) Orange juice. B) Vinegar. C) Soap solution. D) Curd. Show Answer Correct Answer: C) Soap solution. 12. Insulin is an exceptional molecule (made up of 51 amino acids), it is an example of: A) A monosaccharide. B) A polysaccharide. C) A nucleotide. D) A protein. Show Answer Correct Answer: D) A protein. 13. Chemical symbol of chlorine is A) C. B) Ch. C) Cl. D) Cr. Show Answer Correct Answer: C) Cl. 14. An alkali is produced when A) A salt dissolves in water. B) A base dissolves in water. C) An acid dissolves in water. D) An acid reacts with a base. Show Answer Correct Answer: B) A base dissolves in water. 15. Compare the elements that are present in a protein to those in a carbohydrate. A) Protein = C, H, O, N (S) and Carbohydrate = C, H, O. B) Protein = C, H, O, N and Carbohydrate = C, H, N. C) Protein = C, H, O, N, P and Carbohydrate = C, H, O. D) None of the above. Show Answer Correct Answer: A) Protein = C, H, O, N (S) and Carbohydrate = C, H, O. 16. Acetic acid is present in A) Lemon. B) Vinegar. C) Tomato. D) Curd. Show Answer Correct Answer: B) Vinegar. 17. Carbon do oxide turns lime water miljy A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 18. Which compound has the highest boiling point? A) Butane. B) Dimethyl ether. C) Propan-1-the. D) Acetic acid. Show Answer Correct Answer: D) Acetic acid. 19. Which acid is present in your stomach A) Naoh. B) Sulpher. C) Hcl. D) Salt. Show Answer Correct Answer: C) Hcl. 20. All bases have a sour taste. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 21. Which of the following pH values represents a base? A) 2.1. B) 4.6. C) 6.8. D) 8.1. Show Answer Correct Answer: D) 8.1. 22. If AAGAGG went through DNA replication, the complementary bases would be ..... A) TTCTCC. B) UUCUCC. C) All the above. D) None of the above. Show Answer Correct Answer: A) TTCTCC. 23. HNO$_{3}$ A) Nitric acid. B) Hydronitric acid. C) Nitrous acid. D) Hydronitrous acid. Show Answer Correct Answer: A) Nitric acid. 24. Confirmatory test for Carbon dioxide gas is: A) Carbon dioxide burns with a POP sound. B) It smells of burning Sulphur. C) Carbon dioxide turns lime water milky. D) Carbon dioxide turn red litmus blue. Show Answer Correct Answer: C) Carbon dioxide turns lime water milky. 25. If the ph value is 5 what is the substance A) Acid. B) Base. C) Neutral. D) Sweet. Show Answer Correct Answer: A) Acid. ← 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