This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Bases – Quiz 18 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Bases Quiz 18 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The roots ped and pod (from Greek) mean "foot." Pedaling for hours on your bike might make your feet hurt.A podiatrist is a doctor who'll make your feet feel better. "Quad" is a root that means "four or fourth." Which word means "an animal that has four feet" ? A) Square. B) Quatraine. C) Quadrangle. D) Quadruped. Show Answer Correct Answer: D) Quadruped. 2. What is considered to be in the middle of the pH scale A) Acidic. B) Neutral. C) Basic. D) Indicator. Show Answer Correct Answer: B) Neutral. 3. What are the 4 nitrogen bases? 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. If 30% of an individuals DNA is composed of C's, what percentage contains G's? A) 30%. B) 70%. C) 35%. D) 40%. Show Answer Correct Answer: A) 30%. 5. What is the meaning of the Greek base 'hydr'? A) Water. B) Earth. C) Light. D) Sound. Show Answer Correct Answer: A) Water. 6. Arrhenius:Any substance that in aqueous solution is dissocia with hydroxyl ion formation oh $^{-} $ A) Acid. B) Base. C) Neutral. D) Animal. Show Answer Correct Answer: B) Base. 7. Solve for x:2$^{x+6}$=2$^{5}$ A) -1. B) 11. C) 1. D) -11. Show Answer Correct Answer: A) -1. 8. The word equation for an acid reacting with a metal is A) Acid + metal $\rightarrow$. B) Acid + base $\rightarrow$. C) Acid + metal $\rightarrow$. D) Acid + metal $\rightarrow$. Show Answer Correct Answer: A) Acid + metal $\rightarrow$. 9. Say the name of this HCl compound A) Iron hydroxide. B) Chlorine hydroxide. C) Carbon hydroxide. D) Hydrochloric acid. Show Answer Correct Answer: D) Hydrochloric acid. 10. What does the Latin root aud mean? A) One hundered. B) To hear. C) Against. D) To lead. Show Answer Correct Answer: B) To hear. 11. Which one of the following is NOT a property of basic solutions? A) Feels soapy/slippery. B) Tastes sour. C) Conducts electricity. D) Turns red litmus paper blue. Show Answer Correct Answer: B) Tastes sour. 12. What is the formula of aqueous ammonia? A) KOH. B) NaOH. C) Ca (oh) $ _ {2} $. D) NH$_{3 }$(aq). Show Answer Correct Answer: D) NH$_{3 }$(aq). 13. Which phrase describes a molecule of Br$_{2}$, 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: B) Polar with a symmetrical distribution of charge. 14. What is the correct name for the base with the formula $LiOH$ A) Lithium hydroxide. B) Lithium oxide. C) Lithium hydride. D) Lithium carbonate. Show Answer Correct Answer: A) Lithium hydroxide. 15. An entity in the entity-refusal is represented with: A) An entity. B) A oval. C) A rectangle. D) No se de que habla. Show Answer Correct Answer: C) A rectangle. 16. A carbonate reacts with an acid to form what gas? A) Carbon dioxide. B) Oxygen. C) Hydrogen. D) Air. Show Answer Correct Answer: A) Carbon dioxide. 17. Name of one of the neutralization products A) Oxygen. B) Sales. C) Hydracy. D) None. Show Answer Correct Answer: B) Sales. 18. Sustainment that releases hydrogen ions when dissolving in water A) Acid. B) Sal. C) Base. D) Metal. Show Answer Correct Answer: A) Acid. 19. What does biography mean? A) Spending a lifetime writing. B) A story told with illustrations and photographs. C) A written story about a person's life. D) Something written in two sections. Show Answer Correct Answer: C) A written story about a person's life. 20. What is the DNA compliment of this sequence?GCAATCA A) Cgttgt. B) CGTTTA. C) Cgaaat. D) None of the above. Show Answer Correct Answer: A) Cgttgt. 21. What millennium is the year-300 the year? A) -millennium. B) -millennium. C) -Ier millennium. D) -Ave millennium. Show Answer Correct Answer: C) -Ier millennium. 22. Select the name for the following base:Cu(OH)$_{2}$ A) Copper (II) hydroxide. B) Copper (I) hydroxide. C) Copper (II) hydride. D) Copper (I) hydride. Show Answer Correct Answer: A) Copper (II) hydroxide. 23. Calcium phosphate is present in tooth enamel-its nature is A) Basic. B) Acidic. C) Neutral. D) Amphoteric. Show Answer Correct Answer: A) Basic. 24. Which is an example of an amphiprotic species? A) At $ _ {2} $ o $ _ {3} $. B) CO$_{3}$$^{2-}$. C) P $ _ {4} $ o $ {10} $. D) HPO $ _ {4} $$^{2-} $. Show Answer Correct Answer: D) HPO $ _ {4} $$^{2-} $. 25. Guanine bonds with ..... A) Adenine. B) Guanine. C) Cytosine. D) Thymine. Show Answer Correct Answer: C) Cytosine. ← 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