This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Bases – Quiz 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Bases Quiz 17 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Indigestion and heartburn is causes by an over production of stomach acid. If you were suffering from indigestion, what types of foods should you avoid? A) Foods that have a pH BELOW 7. B) Food that have a pH ABOVE 7. C) Food that have a pH of 7. D) Food has no impact on indigestion. Show Answer Correct Answer: A) Foods that have a pH BELOW 7. 2. Identify the salt in the following equation:Zn(OH)$_{2}$ + HNO$_{3}$ $\rightarrow$ H$_{2}$O + Zn(NO$_{3}$)$_{2}$ A) Zn(OH)$_{2}$. B) HNO$_{3}$. C) H$_{2}$O. D) Zn(NO$_{3}$)$_{2}$. Show Answer Correct Answer: D) Zn(NO$_{3}$)$_{2}$. 3. What are the 4 nitrogen bases found in DNA? A) Adenine, thymine, cytoplasm, and guanine. B) Adenine, thymine cytosine, and guanine. C) Adenine, thymine, cytosine, and gylcerol. D) Adenine, thymine, cytosine, and glucose. Show Answer Correct Answer: B) Adenine, thymine cytosine, and guanine. 4. What is the chemical formula for barium hydroxide? A) $ Ba (oh) _2 $. B) $BaO$. C) $BaH_2$. D) $ Ba_2o_3 $. Show Answer Correct Answer: A) $ Ba (oh) _2 $. 5. What is the formula of hydrochloric acid? A) HCl. B) H$_{2}$SO$_{4}$. C) HNO$_{3}$. D) H$^{+}$. Show Answer Correct Answer: A) HCl. 6. A solution has a pH of 7.0. What would happen to the pH if H ions were added? A) PH would go up. B) PH would go down. C) PH would stay the same. D) None of these. Show Answer Correct Answer: B) PH would go down. 7. What is the complementary base pairing rule in DNA? A) A pairs with C, T pairs with G. B) A pairs with T, C pairs with G. C) A pairs with G, T pairs with C. D) A pairs with U, C pairs with G. Show Answer Correct Answer: B) A pairs with T, C pairs with G. 8. Sodium Hydroxide turns blue litmus red A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 9. Base:substance that in solution accepts protons (H $^{+1} $). A) Arrhenius Theory. B) TEORIA DE BRONSTED-LOWRY. C) Acid reactions. D) N.A. Show Answer Correct Answer: B) TEORIA DE BRONSTED-LOWRY. 10. From the below options, which one is not an olfactory indicator? A) Onion. B) Lichen. C) Clove oil. D) Vanilla. Show Answer Correct Answer: B) Lichen. 11. What describes HPO$_{4}$$^{2-}$? A) Amphiprotic but not amphoteric. B) Amphoteric but not amphiprotic. C) Amphiprotic and amphoteric. D) Neither amphiprotic nor amphoteric. Show Answer Correct Answer: C) Amphiprotic and amphoteric. 12. Sticky texture A) Acid. B) Base. C) Neutral. D) None of the above. Show Answer Correct Answer: A) Acid. 13. Which of the following is a purine nitrogen base? A) Cytosine. B) Thymine. C) Adenine. D) Uracil. Show Answer Correct Answer: C) Adenine. 14. From the following software, which is not a database manager? A) Libre Office Base. B) Libre Office Access. C) MySQL. D) Oracle. Show Answer Correct Answer: B) Libre Office Access. 15. Which of the following is found in apple? A) Oxalic acid. B) Folic acid. C) Lactic acid. D) Malic acid. Show Answer Correct Answer: D) Malic acid. 16. Which of the following household items is most likely to be a base? A) Lemon juice. B) Vinegar. C) Baking soda. D) Milk. Show Answer Correct Answer: C) Baking soda. 17. Which phrase describes a molecule of NH$_{3}$, in terms of molecular polarity and distribution of charge A) Polar with an asymmetrical distribution of charge. B) Polar with a symmetrical distribution of charge. C) Nonpolar with an asymmetrical distribution of charge. D) Nonpolar with a symmetrical distribution of charge. Show Answer Correct Answer: A) Polar with an asymmetrical distribution of charge. 18. Which substance reacts with certain metals to produce gaseous $H_2$ A) Acids. B) Bases. C) All the above. D) None of the above. Show Answer Correct Answer: A) Acids. 19. What is the complementary base pair for cytosine in DNA? A) Adenine. B) Thymine. C) Guanine. D) Uracil. Show Answer Correct Answer: C) Guanine. 20. The word portable contains a latin root that means A) To write. B) To send. C) To carry. D) To hear. Show Answer Correct Answer: C) To carry. 21. What are the four nitrogen bases found in DNA? A) Adenine, Thymine, Cytosine, Guanine. B) Adenine, Uracil, Cytosine, Guanine. C) Adenine, Thymine, Cytosine, Uracil. D) Adenine, Thymine, Guanine, Uracil. Show Answer Correct Answer: A) Adenine, Thymine, Cytosine, Guanine. 22. Oxalic acid is present in which of the given substances A) Milk. B) Curd. C) Spinach. D) Ant's sting. Show Answer Correct Answer: C) Spinach. 23. When few drops of phenolphthalein are added to sample 'A' it turned pink. To this pink coloured solution we added a few drops of sample 'B'. With continuous stirring the pink colour disappears. Samples 'A' and 'B' are: A) Sample 'A' is acidic and sample 'B' is basic. B) Sample 'A' is basic and sample 'B' is acidic. C) Sample 'A' is basic and sample 'B' is neutral. D) Sample 'A' is acidic and sample 'B' is neutral. Show Answer Correct Answer: B) Sample 'A' is basic and sample 'B' is acidic. 24. Scale that ranges from 1-14 A) Acid. B) Base. C) Salt. D) PH. Show Answer Correct Answer: D) PH. 25. Select the formula for the following acid:perchloric acid A) Hclo $ _ {4} $. B) HCLO $ _ {3} $. C) Hclo $ _ {2} $. D) HCl. Show Answer Correct Answer: A) Hclo $ _ {4} $. ← 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