This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Bases – Quiz 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Bases Quiz 12 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A very strong acid would have a pH of A) 1. B) 7. C) 9. D) 14. Show Answer Correct Answer: A) 1. 2. What are acidic? A) They are compounds that have oh $^{-} $. B) They are compounds that have h $^{+} $. C) They are compounds that have h $^{+} $ and pH greater than 7. D) Are composed of neutral pH. Show Answer Correct Answer: B) They are compounds that have h $^{+} $. 3. Which of these compounds is NOT an acid? A) HCl. B) H$_{2}$SO$_{4}$. C) CH$_{3}$COOH. D) H$_{2}$O. Show Answer Correct Answer: D) H$_{2}$O. 4. The root word form (from Latin) means "shape" and can stand by itself.What is the formula for success?In order to be accepted by others, some people conform to society.The suffix "-less" means "without." What does "formless" mean? A) Able to see shapes. B) Having no shape. C) The measure of a shape. D) Drawing a shape. Show Answer Correct Answer: B) Having no shape. 5. A weak alkali would have a pH of A) 8. B) 7. C) 6. D) 14. Show Answer Correct Answer: A) 8. 6. Pure water is ..... A) Acidic. B) Basic. C) Neutal. D) None of the above. Show Answer Correct Answer: C) Neutal. 7. What does the base 'A' pair with? A) A. B) T. C) C. D) G. Show Answer Correct Answer: B) T. 8. This structure contains the code for life A) Guanine. B) Uracil. C) DNA. D) Biomolecules. Show Answer Correct Answer: C) DNA. 9. What are the components of a DNA nucleotide? A) Deoxyribose, a phosphate and one of the bases:adenine, cytosine, guanine or thymine. B) Ribose, a phosphate and one of the bases:adenine, cytosine, guanine or uracil. C) Deoxyribose, a nitrate and one of the bases:adenine, cytosine, guanine or thymine. D) Ribose, a nitrate and one of the bases:adenine, cytosine, guanine or thymine. Show Answer Correct Answer: A) Deoxyribose, a phosphate and one of the bases:adenine, cytosine, guanine or thymine. 10. Name of the substances used to detect an acid or a base. A) Electrolytic. B) Catalysts. C) Indicators. D) None of the above. Show Answer Correct Answer: C) Indicators. 11. PH of 0-7 A) Acid. B) Base. C) All the above. D) None of the above. Show Answer Correct Answer: A) Acid. 12. Sulphuric acid produces ..... salts A) Chloride. B) Nitrate. C) Sulphate. D) Carbonate. Show Answer Correct Answer: C) Sulphate. 13. The correct formula of calcium hydroxide is: A) Highh. B) KOH. C) Ca(OH)$_{2}$. D) K(OH)$_{2}$. Show Answer Correct Answer: C) Ca(OH)$_{2}$. 14. What holds the DNA bases together? A) Hydrogen bonds. B) DNA bases. C) Double Helix. D) Paired bases. Show Answer Correct Answer: A) Hydrogen bonds. 15. Which compound represents an acid? A) NaOH. B) HCl. C) CH$_{2}$OH. D) NaCl. Show Answer Correct Answer: B) HCl. 16. What is the value in base 10? $\left(101011\right)_2$ A) 45. B) 34. C) 43. D) 86. Show Answer Correct Answer: C) 43. 17. If a lamp emits light, that means it ..... light. A) Sends out. B) Throws. C) Hears. D) Sees. Show Answer Correct Answer: A) Sends out. 18. The letters of the DNA alphabet are: A) A, C, G and T. B) A, O, G, and T. C) C, G, P and T. D) C, G, T and D. Show Answer Correct Answer: A) A, C, G and T. 19. What is the formula of the ion produced when an acid is dissolved in water? A) HCl. B) H$_{2}$SO$_{4}$. C) HNO$_{3}$. D) H$^{+}$. Show Answer Correct Answer: D) H$^{+}$. 20. Rain water is slightly acidic. What is its pH? A) 1.0. B) 5.6. C) 7.0. D) 8.2. Show Answer Correct Answer: B) 5.6. 21. Guanine, cytosine, adenine, and thymine are A) Sides of the ladder in DNA. B) Phosphate molecules. C) Nitrogen bases. D) None of the above. Show Answer Correct Answer: C) Nitrogen bases. 22. What millennium is the year 1769 to? A) Iie millennium. B) III millennium. C) 1st year. D) 4th millennium. Show Answer Correct Answer: A) Iie millennium. 23. Reacts with phenolphthalein turning it magenta A) Acid. B) Base. C) Neutral. D) None of the above. Show Answer Correct Answer: B) Base. 24. Identify the cardinality of the statement:a patient can be treated by a single doctor when he goes consults, and in turn a doctor attends one or more patients. A) One by one. B) One to many. C) Many to many. D) None of the above. Show Answer Correct Answer: B) One to many. 25. Cytosine always pairs with A) Adenine. B) Thymine. C) Uracil. D) Guanine. Show Answer Correct Answer: D) Guanine. ← PreviousNext →Related QuizzesClass 7 Science Chapter 4 Bases Quiz 1Class 7 Science Chapter 4 Bases Quiz 2Class 7 Science Chapter 4 Bases Quiz 3Class 7 Science Chapter 4 Bases Quiz 4Class 7 Science Chapter 4 Bases Quiz 5Class 7 Science Chapter 4 Bases Quiz 6Class 7 Science Chapter 4 Bases Quiz 7Class 7 Science Chapter 4 Bases Quiz 8Class 7 Science Chapter 4 Bases Quiz 9Class 7 Science Chapter 4 Bases Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books