This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Bases – Quiz 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Bases Quiz 14 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is Microsoft Access? A) A database. B) A spreadsheet. C) Database Manager. D) Un Parche de Office. Show Answer Correct Answer: C) Database Manager. 2. Solve the equation:$2=2^{3x-2}$ A) X =-3. B) X = 1. C) X = 2. D) X =-5. Show Answer Correct Answer: B) X = 1. 3. What is responsible for holding the two strands of the DNA double helix together? A) Hydrogen bonds. B) Alleles. C) London dispersion forces. D) Deoxyribose sugars. Show Answer Correct Answer: A) Hydrogen bonds. 4. What is there more of in solution with a weak acid? A) Reactants. B) Products. C) Both are equal. D) Neither. Show Answer Correct Answer: A) Reactants. 5. Strong acids will have a A) Low concentration of hydronium ions. B) High concentration of hydronium ions. C) High concentration of hydroxide ions. D) Low concentration of hydroxide ions. Show Answer Correct Answer: B) High concentration of hydronium ions. 6. A neutral solution A) It has the same amount of H+ ions and Oh-ions. B) It has more H+ ions than Oh-. C) It has less amount of H+ ions than oh-. D) None of the above. Show Answer Correct Answer: A) It has the same amount of H+ ions and Oh-ions. 7. Weak acid will have a A) Low concentration of hydronium ions. B) High concentration of hydronium ions. C) High concentration of hydroxide ions. D) Low concentration of hydroxide ions. Show Answer Correct Answer: A) Low concentration of hydronium ions. 8. A substance with a pH of 7 is A) A base. B) An acid. C) Neutral. D) None of the above. Show Answer Correct Answer: C) Neutral. 9. What does the Latin root aqua mean? A) Dirt. B) Water. C) Sand. D) Ocean. Show Answer Correct Answer: B) Water. 10. A substance is found to turn phenolpthalein magenta (pink). Predict what will happen when blue and red litmus paper is placed into the substance. A) The blue litmus will stay blue and the red litmus will stay red. B) The blue litmus will stay blue and the red litmus will turn blue. C) The blue litmus will turn red and the red litmus will stay red. D) The blue litmus will turn red and the red litmus will turn blue. Show Answer Correct Answer: B) The blue litmus will stay blue and the red litmus will turn blue. 11. During an experiment about the rate of dissolving you test temperature. In one beaker you use room temperature water, one beaker you use hot water and the last beaker you use ice water. In what order would the beakers dissolve the solute from slowest to fastest? A) Hot, cold, room temperature. B) Cold, hot, room temperature. C) Cold, room temperature, hot. D) Hot, room temperature, cold. Show Answer Correct Answer: C) Cold, room temperature, hot. 12. HSO$_{4}$$^{-}$(aq)+H$_{2}$O(l) $\rightarrow$ H$_{3}$O$^{+}$(aq)+SO$_{4}$$^{2-}$(aq)Identify the Acid in the above reaction. A) HSO $ _ {4} $$^{-} $. B) H$_{2}$O. C) H$_{3}$O$^{+}$. D) SO$_{4}$$^{2-}$. Show Answer Correct Answer: A) HSO $ _ {4} $$^{-} $. 13. Are characteristics of acids except A) PH DE 1-7. B) Formed by OH. C) They contain non-metals. D) They have a sour taste. Show Answer Correct Answer: B) Formed by OH. 14. Which one feels slippery A) A base. B) An acid. C) A neutral. D) None of the above. Show Answer Correct Answer: A) A base. 15. All substances are either acidic or basic A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 16. Solve the equation:$8^{3x-4}=8^{2x+1}$ A) X = 4. B) X = 3. C) X =-2. D) X = 5. Show Answer Correct Answer: D) X = 5. 17. Vinegar CH$_{3}$COOH is ..... A) An acid. B) A base. C) A salt. D) None of the above. Show Answer Correct Answer: A) An acid. 18. Which 2 molecules form the sides (backbone) of the DNA ladder? A) Deoxyribose sugar and adenine. B) Deoxyribose sugar and a hydrogen bond. C) Deoxyribose sugar and the nucleus. D) Deoxyribose sugar and phosphate. Show Answer Correct Answer: D) Deoxyribose sugar and phosphate. 19. On the pH scale the range of greater than 7 to 14 corresponds to substances: A) Saladas. B) Acidic. C) Basic. D) None. Show Answer Correct Answer: C) Basic. 20. Which of these substances is acidic? A) Tap Water. B) Lemon. C) Ammonia. D) Baking Soda. Show Answer Correct Answer: B) Lemon. 21. In the structure of DNA which one of the following binds with cytosine? A) Dexoxyribose. B) Thymine. C) Within limits. D) Adenine. Show Answer Correct Answer: A) Dexoxyribose. 22. What does the Latin root ject mean? A) Mother. B) To throw. C) Bad. D) To write. Show Answer Correct Answer: B) To throw. 23. How can I enter data to a table? A) Through a form. B) By means of a report. C) Through a consultation. D) Through a macro. Show Answer Correct Answer: A) Through a form. 24. Barium hydroxide(barium is a +2 ion, hydroxide is a-1 ion) A) Baoh. B) Ba $ _ {2} $ oh. C) Ba (oh) $ _ {2} $. D) None of the above. Show Answer Correct Answer: C) Ba (oh) $ _ {2} $. 25. An extreme acid will have a ph of A) 13. B) 6. C) 1. D) 7. Show Answer Correct Answer: C) 1. ← 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