This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Bases – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Bases Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of these alkalis is commonly used in household cleaners? A) Sodium hydroxide (NaOH). B) Calcium hydroxide (Ca(OH)2). C) Ammonium hydroxide (NH4OH). D) Ferric hydroxide (Fe(OH)3). Show Answer Correct Answer: A) Sodium hydroxide (NaOH). 2. PH below 7 A) Base. B) Acid. C) All the above. D) None of the above. Show Answer Correct Answer: B) Acid. 3. When a strong acid and base are mixed, neutralization occurs. A) TEORIA THE LEWIS. B) TEORIA DE BRONSTED-LOWRY. C) Deid-base titration or neutralization. D) N.A. Show Answer Correct Answer: C) Deid-base titration or neutralization. 4. In a DNA double helix, the two strands are held together by what type of bond? A) Ionic bonds. B) Covalent bonds. C) Hydrogen bonds. D) Metallic bonds. Show Answer Correct Answer: C) Hydrogen bonds. 5. Which nitrogen base is not found in RNA? A) Adenine. B) Thymine. C) Cytosine. D) Uracil. Show Answer Correct Answer: B) Thymine. 6. Which Greek base means "water" ? A) Graph. B) Hydr. C) Photo. D) Phon. Show Answer Correct Answer: B) Hydr. 7. To test a solution in container 'A.' You dipped the filter paper in this solution and then in lime water. The colour of filter paper after dipping in lime water becomes brownish red. It shows that the solution in container 'A' was: A) Red litmus solution. B) Methyl red solution. C) Turmeric solution. D) Phenolphthalein solution. Show Answer Correct Answer: C) Turmeric solution. 8. In a neutralization reaction between an acid and a base, what are the typical products? A) Water and salt. B) Hydrogen gas and salt. C) Carbon dioxide and water. D) Oxygen and salt. Show Answer Correct Answer: A) Water and salt. 9. Which of the following latin roots means to send? A) Ject. B) Port. C) Aud. D) With. Show Answer Correct Answer: D) With. 10. Which of the following latin roots means bad? A) Bene. B) Pater. C) Mater. D) Mal. Show Answer Correct Answer: D) Mal. 11. What are the three components of a nucleotide? A) Sugar, hydrogen, nitrogen base. B) Sugar, oxygen, nitrogen base. C) Sugar, phosphate, nitrogen base. D) Sugar, phosphate, protein. Show Answer Correct Answer: C) Sugar, phosphate, nitrogen base. 12. Does acids dissolve in water? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 13. What are the formulas for the following? ..... sulfuric acid ..... nitric acid ..... A) H $ _ {2} $ so, ENT. B) H $ _ {2} $ so $ _ {3} $, hno $ _ {3} $. C) H$_{2}$S, H$_{3}$N. D) H $ _ {2} $ so $ _ {4} $, hno $ _ {3} $. Show Answer Correct Answer: D) H $ _ {2} $ so $ _ {4} $, hno $ _ {3} $. 14. Astudenthasfoursolutionsamongwhichoneisacidicinnature.Shewantstoidentifytheacidic solutionusingalitmuspaper.Whichoftheseobservationswouldhelpidentifytheacidicsolution? A) Placeblue litmusinthesolutionandseeifitturnswhite. B) Placeredlitmusinthesolutionandseeifitturnswhite. C) Placeblue litmusinthesolutionandseeifitturnsred. D) Placeredlit Musinthesolution. Show Answer Correct Answer: C) Placeblue litmusinthesolutionandseeifitturnsred. 15. According to the alternate acid base theory, a compound is a base if it A) Donates a hydrogen ion. B) Accepts a hydrogen ion. C) Donates a hydroxide ion. D) Accepts a hydroxide ion. Show Answer Correct Answer: B) Accepts a hydrogen ion. 16. Bases will turn litmus paper ..... , while acids will turn litmus paper ..... A) Blue red. B) Red blue. C) Pink colourless. D) Colourless pink. Show Answer Correct Answer: A) Blue red. 17. All acids begin with A) He$^{+}$. B) OH-. C) H$^{+}$. D) Hydro. Show Answer Correct Answer: C) H$^{+}$. 18. Acid:Substance that in dissolution releases or yields protons. A) Arrhenius Theory. B) TEORIA DE BRONSTED-LOWRY. C) Acid reactions. D) N.A. Show Answer Correct Answer: B) TEORIA DE BRONSTED-LOWRY. 19. According to Arrhenius, what is the definition of an ACID? A) A substance that contains hydroxide and ionizes to produce OH-. B) A substance that contains hydrogen and ionizes to produce H+. C) A substance that contains hydrogen and ionizes to produce OH-. D) A substance that contains hydroxide and ionizes to produce H+. Show Answer Correct Answer: B) A substance that contains hydrogen and ionizes to produce H+. 20. What is there more of in solution with a strong acid? A) Reactants. B) Products. C) Both are equal. D) Neither. Show Answer Correct Answer: B) Products. 21. Which represents a hydroxide ion? A) H$^{+}$. B) OH$^{-}$. C) That $^{+} $. D) Cl$^{-}$. Show Answer Correct Answer: B) OH$^{-}$. 22. Each strand of a DNA molecule contains nitrogenous bases that pair with other nitrogenous bases in very specific ways. A diagram of a section of DNA is shown. A) 5'agu CGU CGU appearance. B) 5'tgt atc tgc gc t. C) ATO TCG ACG CGC A. D) TCG CGC AGC TAC A. Show Answer Correct Answer: C) ATO TCG ACG CGC A. 23. There are 2 types of acids and bases A) Strong and weak. B) Strong and basic. C) Sour and bitter. D) Light and blue. Show Answer Correct Answer: A) Strong and weak. 24. According to this theory, an acid-base reaction generates a new acid and a new base, which are called conjugates. A) Arrhenius Theory. B) TEORIA DE BRONSTED-LOWRY. C) BASES. D) N.A. Show Answer Correct Answer: B) TEORIA DE BRONSTED-LOWRY. 25. Is this a neutralization reaction? A) YES. B) NO. C) All the above. D) None of the above. Show Answer Correct Answer: A) YES. ← 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 10Class 7 Science Chapter 4 Bases Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books