This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 14 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Bases turn blue litmus paper red. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 2. Which is the stronger acid? A) PH 1. B) PH 4. C) PH 8. D) PH 13. Show Answer Correct Answer: A) PH 1. 3. Which type of substance yields hydrogen ions, H$^{+}$, in an aqueous solution? A) An Arrhenius acid. B) An Arrhenius base. C) A saturated hydrocarbon. D) An unsaturated hydrocarbon. Show Answer Correct Answer: A) An Arrhenius acid. 4. Chlorous acid has the formula A) HCLO $ _ {3} $. B) Hclo $ _ {2} $. C) HCLO. D) HCl. Show Answer Correct Answer: B) Hclo $ _ {2} $. 5. A solution with a pH of 11 has a H$^{+}$ concentration of: A) 1 x 10$^{-11}$ moles/liter. B) 1 x 10$^{-3}$ moles/liter. C) 1 x 10$^{11}$ moles/liter. D) 1 x 10$^{3}$ moles/liter. Show Answer Correct Answer: A) 1 x 10$^{-11}$ moles/liter. 6. A student reacted hydrochloric acid with sodium hydroxide, until the solution was neutral. Next he evaporated, the water from the beaker. She noticed that white crystals remained in the bottom of the beaker. The crystals were most likely ..... A) Alkali. B) Acid. C) Water. D) Salt. Show Answer Correct Answer: D) Salt. 7. Acids in water solvents ..... exhibit taste. A) Suk. B) Bitter. C) Do not. D) Sweet. Show Answer Correct Answer: A) Suk. 8. What is another name for a base? A) Acid. B) Alkaline. C) PH. D) None of the above. Show Answer Correct Answer: B) Alkaline. 9. 0$^\circ$C= ..... Kelvin A) 273. B) -273. C) 274. D) 100. Show Answer Correct Answer: A) 273. 10. What would happen to blue litmus paper if it came into contact with an acid? A) It would turn red. B) It would turn green. C) It would stay blue. D) It would turn pink. Show Answer Correct Answer: A) It would turn red. 11. Which of the Following acid is not stored in Glass Bottles A) HCl. B) HNO$_{3}$. C) HF. D) H$_{2}$SO$_{4}$. Show Answer Correct Answer: C) HF. 12. Which of the following is a pH for a strong acid? A) 1. B) 6. C) 7. D) 13. Show Answer Correct Answer: A) 1. 13. Which of the following correctly identifies an acid-base pair? A) HCL, NaOH. B) H $ _ {2} $ co $ _ {3} $, co $ _ {3} $$^{2-} $. C) H$_{3}$O$^{+}$, OH$^{-}$. D) NH $ _ {4} $$^{+} $, $ _ {3} $. Show Answer Correct Answer: D) NH $ _ {4} $$^{+} $, $ _ {3} $. 14. What are the monomers for Proteins? A) Nucleic Acids. B) Amino Acids. C) Monosaccarides. D) Nucleotides. Show Answer Correct Answer: B) Amino Acids. 15. Natural Indicator? A) Turmeric powder. B) Methyl orange. C) Acid and Base. D) None of the above. Show Answer Correct Answer: A) Turmeric powder. 16. You test a solution with pH paper, and the paper turns blue. The solution is ..... A) Neutral. B) An acid. C) A base. D) An acid & a base. Show Answer Correct Answer: C) A base. 17. The pH scale is used to know what? A) Your temperature. B) Know one knows. C) The colors of acids and bases. D) The strength of acids and bases. Show Answer Correct Answer: D) The strength of acids and bases. 18. The difference between a strong acid and a weak acid is that a strong acid ..... A) Has a lower pH. B) Has a higher concentration of OH$^{-}$. C) Has a higher pH. D) Dissociates completely. Show Answer Correct Answer: D) Dissociates completely. 19. Turmeric is a natural indicator. On adding its paste to acid and base separately, which colours would be observed. A) Yellow in both acid and base. B) Yellow in acid and red in base. C) Pink in acid and yellow in base. D) Red in acid and blue in base. Show Answer Correct Answer: B) Yellow in acid and red in base. 20. Litmus is a common A) Catalyst. B) Indicator. C) Enzyme. D) Base. Show Answer Correct Answer: B) Indicator. 21. A sugar solution has a pH of 7. This means the sugar solution is: A) Acidic. B) Basic. C) Neutral. D) None of the above. Show Answer Correct Answer: C) Neutral. 22. What is the formula of chlorous acid? A) HCLO $ _ {3} $. B) Hclo $ _ {2} $. C) HCLO. D) HCl. Show Answer Correct Answer: B) Hclo $ _ {2} $. 23. What is the difference between DNA and RNA from the point of view of the nitrogenous bases that are present in their nucleotides? A) In DNA, nucleotides can be made up of A, T, C, G. In RNA, nucleotides can also contain A, C or G; however, instead of T, they contain U. B) Purine and Pyrimidine. C) Pyrimidine:Thymine, Cytosine (Urical). D) DNA, RNA. Show Answer Correct Answer: A) In DNA, nucleotides can be made up of A, T, C, G. In RNA, nucleotides can also contain A, C or G; however, instead of T, they contain U. 24. Name the reaction which takes place between an acid and a base A) Displacement. B) Neutralization. C) Double displacement. D) Redox reaction. Show Answer Correct Answer: B) Neutralization. 25. A wasp sting is alkaline. Which one of these substances would neutralise the sting? A) Vinegar. B) Baking soda. C) Bleach. D) Pure water. Show Answer Correct Answer: A) Vinegar. ← PreviousNext →Related QuizzesClass 7 Science Chapter 4 Acids Quiz 1Class 7 Science Chapter 4 Acids Quiz 2Class 7 Science Chapter 4 Acids Quiz 3Class 7 Science Chapter 4 Acids Quiz 4Class 7 Science Chapter 4 Acids Quiz 5Class 7 Science Chapter 4 Acids Quiz 6Class 7 Science Chapter 4 Acids Quiz 7Class 7 Science Chapter 4 Acids Quiz 8Class 7 Science Chapter 4 Acids Quiz 9Class 7 Science Chapter 4 Acids Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books