This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Acids > Class 7 Science Chapter 4 Acids – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 9 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Use your codon chart to answer the following question:GCG ACU AAA UUUWhat is the sequence of amino acids that will be translated from the mRNA above? A) Alanine-threonine-phenlalanine-lysine. B) Alanine-lysine-phenlalanine-alanine-threonine. C) Alanine-phenlalanine-threonine-lysine. D) Alanine-threonine-lysine-phenlalanine. Show Answer Correct Answer: D) Alanine-threonine-lysine-phenlalanine. 2. Which one of the following is not a neutral substance? A) Urea. B) Sodium Hydroxide. C) Glucose. D) Sugar. Show Answer Correct Answer: B) Sodium Hydroxide. 3. In eukaryotes, DNA is mainly present in A) Golgi Complex. B) Cytoplasm. C) Ribosome. D) Nucleus. Show Answer Correct Answer: D) Nucleus. 4. What is the location in the cell for translation? A) Mitochondria. B) Ribosome. C) Nucleus. D) Chloroplast. Show Answer Correct Answer: B) Ribosome. 5. Methyl Orange is a A) Human-Made. B) Colourless. C) Pink. D) Natural. Show Answer Correct Answer: A) Human-Made. 6. Phenolophalein turns from clear to pink when the pH turns A) Basic. B) Saline. C) Ionic. D) Acidic. Show Answer Correct Answer: A) Basic. 7. Which of the following could be classified as an Arrhenius acid? A) HF. B) NaOH. C) NaCl. D) Mg(OH)$_{2}$. Show Answer Correct Answer: A) HF. 8. Is the carboxyl carbon always carbon number 1? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 9. Which of the following is NOT an acid? A) H$_{2}$SO$_{4}$. B) CH$_{3}$COOH. C) C$_{2}$H$_{6}$. D) HCl. Show Answer Correct Answer: C) C$_{2}$H$_{6}$. 10. Ocean water is only slightly basic. What might its pH value be? A) 5. B) 8. C) 12. D) 2. Show Answer Correct Answer: B) 8. 11. YOU NEED YOUR CODON CHART!mRNA:GGACCUAUUCAGWhat is the amino acid sequence coded for by the mRNA above? A) Pro-Gly-Stop-Val. B) Gly-Pro-Ile-Gln. C) Ser-Tyr-Arg-Gly. D) Gln-Ile-Pro-Gly. Show Answer Correct Answer: B) Gly-Pro-Ile-Gln. 12. The indicator that changes basic solution to green is A) China rose. B) Phenolphthalein. C) Methyl Orange. D) Turmeric. Show Answer Correct Answer: A) China rose. 13. The electrostatic charge means the atom A) Has lost or gained an electron. B) Has a negative charge. C) Has a positive charge. D) Has no movement. Show Answer Correct Answer: A) Has lost or gained an electron. 14. What is the substance with a neutral pH of 7? A) Blood. B) Milk. C) Water. D) Orange Juice. Show Answer Correct Answer: C) Water. 15. Always add the word " ..... " to the end when naming acids A) Hydro. B) Acid. C) High. D) Base. Show Answer Correct Answer: B) Acid. 16. Which drug is used for indigestion in the following A) Antacid. B) Analyst. C) Anti-septic. D) Antibiotic. Show Answer Correct Answer: A) Antacid. 17. Which is used as the antacid in the following? A) Hydrochloric acid. B) Common salt. C) Magnesium hydroxide. D) Calcium hydroxide. Show Answer Correct Answer: C) Magnesium hydroxide. 18. When the bee is pierced, it is released from its hill ..... A) Methanoic acid. B) Amino acid. C) Hydrochloric acid. D) Acetic acid. Show Answer Correct Answer: A) Methanoic acid. 19. When an equal strength acid and base are mixed, what kind of chemical reaction occurs? A) Decomposition. B) Oxdation. C) Neutralization. D) Combustion. Show Answer Correct Answer: C) Neutralization. 20. The H in pH stands for A) Help. B) Hydrogen. C) Happy. D) Hood. Show Answer Correct Answer: B) Hydrogen. 21. What is the chemical formula and common name of Copper sulphate? A) Chemical formula:CuSO$_{4}$ Common name:blue vitriol. B) Chemical formula:Cu$_{2}$SO$_{4}$$_{Common name:blue vitriol}$. C) Chemical formula:CoSO$_{4}$ Common name:Green vitriol. D) None of the above. Show Answer Correct Answer: A) Chemical formula:CuSO$_{4}$ Common name:blue vitriol. 22. Explain what happens when a strong acid and a strong base are poured into the same container. A) They form separate layers. B) They mix physically but not chemically. C) They break apart into separate elements. D) They react chemically to form a salt. Show Answer Correct Answer: D) They react chemically to form a salt. 23. The suffix-ic in the name of an oxyacid, implies that the polyatomic ion in the acid has a ..... suffix. A) -ite. B) -ide. C) -ous. D) -ate. Show Answer Correct Answer: D) -ate. 24. A substance that changes color when mixed with an acid or base is a(n) ..... A) Indicator. B) Neutralizer. C) Electricity. D) None of these. Show Answer Correct Answer: A) Indicator. 25. Brine solution is A) Aqueous solution of sodium bicarbonate. B) Aqueous solution of sodium carbonate. C) Aqueous solution of sodium chloride. D) Aqueous solution of sodium hydroxide. Show Answer Correct Answer: C) Aqueous solution of sodium chloride. 26. Which property is not associated with acids? A) Reacts with metals. B) Turns litmus paper blue. C) Sour taste. D) Strong acids can burn you. Show Answer Correct Answer: B) Turns litmus paper blue. 27. Hypochlorus (HOCl) is a A) Strong base. B) Weak Acid. C) Weak Base. D) Strong Acid. Show Answer Correct Answer: B) Weak Acid. 28. A pH level of 7 indicates A) Base. B) Neutral. C) Non of the following. D) Acid. Show Answer Correct Answer: B) Neutral. 29. Based on statement below, choose the RIGHT statements about carboxylic (the answer could be more than one) A) Monocarboxylic acids are compound that containing two-COOH groups. B) Carboxylic acid has position isomer. C) Carboxylic acid is a functional group isomer of eter. D) Ethanoic acid has higher boiling point than ethanal. E) Capric acid is straight carboxylic acid with eight carbon atom. Show Answer Correct Answer: D) Ethanoic acid has higher boiling point than ethanal. 30. Hydrobromic (HBr) is a A) Weak Base. B) Weak Acid. C) Strong base. D) Strong Acid. Show Answer Correct Answer: D) Strong Acid. 31. Which method is recommended to dilute an acid A) An acid is added to water. B) Water added to acid. C) All the above. D) None of the above. Show Answer Correct Answer: A) An acid is added to water. 32. Can an acid is reactive to glass and metal both A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 33. When put into a solution that is basic, phenolphthalein turns ..... A) Blue. B) Magenta. C) Black. D) Violet. Show Answer Correct Answer: B) Magenta. 34. Drain cleaner has a pH of 13. What is drain cleaner? A) Neutral. B) An acid. C) A strong base. D) A weak base. Show Answer Correct Answer: C) A strong base. 35. Why are many enzymes soluble in water? A) They contain large numbers of hydrogen bonds. B) They contain many amino acids with hydrophilic side chains. C) They contain an active site. D) None of the above. Show Answer Correct Answer: B) They contain many amino acids with hydrophilic side chains. 36. (a) conduct electricity and turn litmus paper red. A) Salts. B) Bases. C) A. Acids. D) Neutral solutions. Show Answer Correct Answer: C) A. Acids. 37. What is the formula for chromic acid? A) H$_{2}$CrO$_{3}$. B) H$_{2}$Cr. C) H$_{2}$CrO. D) H$_{2}$CrO$_{4}$. Show Answer Correct Answer: D) H$_{2}$CrO$_{4}$. 38. Methanoic (HCOOH) is a A) Weak Acid. B) Strong Acid. C) Weak Base. D) Strong base. Show Answer Correct Answer: A) Weak Acid. 39. When neutralization reaction happens, they form- A) Salt and Sodium Chloride. B) Salt, Water and Heat. C) Heat and Sugar. D) None of the above. Show Answer Correct Answer: B) Salt, Water and Heat. 40. The pH of vinegar is 2.5. Vinegar is a ..... A) Weak base. B) Strong acid. C) Strong base. D) Weak acid. Show Answer Correct Answer: B) Strong acid. 41. A solution was added to some ammonium chloride then heated. A gas which had a pungent smell and turned moist red litmus blue was produced. Which of the following could have been present in the original solution? A) Potassium hydroxide. B) Sodium chloride. C) Hydrochloric acid. D) Vinegar. Show Answer Correct Answer: A) Potassium hydroxide. 42. Phhe value of neutral solvents A) 4. B) 8. C) 10. D) 7. Show Answer Correct Answer: D) 7. 43. Which of the following show an acid and its conjugate base pair (in that order) A) OH$^{-}$, H$_{2}$O. B) H $ _ {2} $ Co $ {3} $, HCO $ _ {3} $$^{-} $. C) NH $ _ {4} $$^{+} $, h $ _ {2} $ o. D) H$_{2}$SO$_{4}$, SO$_{4}$$^{2-}$. Show Answer Correct Answer: B) H $ _ {2} $ Co $ {3} $, HCO $ _ {3} $$^{-} $. 44. When action is done with acid and metal ..... give the gas. A) Oxygen. B) Chlorine. C) Hydrogen. D) Carbon Diaxide. Show Answer Correct Answer: C) Hydrogen. 45. What is the name for this acid HF A) Fluoric acid. B) Hydrofluoric acid. C) Fluorous acid. D) None of the above. Show Answer Correct Answer: B) Hydrofluoric acid. 46. Which of the following is true about acids and bases? A) The higher the pH, the stronger the acid. B) The higher the pH, the weaker the base. C) The lower the pH, the stronger the acid. D) The lower the pH, the more neutral the acid. Show Answer Correct Answer: C) The lower the pH, the stronger the acid. 47. Nitric Acid is an Example of ..... A) Natural Acid. B) Mineral Acid. C) Strong Acid. D) Weak Acid. Show Answer Correct Answer: B) Mineral Acid. 48. Enzymes are an example of which macromolecule? A) Proteins. B) Nucleic Acids. C) Carbohydrates. D) Lipids. Show Answer Correct Answer: A) Proteins. 49. The name of the acid with the formula HF is ..... A) Fluorate acid. B) Hydrogen fluoridic acid. C) Flouric acid. D) Hydrofluoric acid. Show Answer Correct Answer: D) Hydrofluoric acid. 50. Which is the correct pairing? A) A-C. B) A-T. C) A-G. D) None of the above. Show Answer Correct Answer: B) A-T. 51. A BASE WAS GIVEN TO AN INDICATOR, AND IT GAVE PINK COLOUR. WHICH INDICATOR WAS USED? A) LITMUS PAPER. B) TURMERIC INDICATOR. C) PHENOLPHTHALEIN. D) CHINA ROSE INDICATOR. Show Answer Correct Answer: C) PHENOLPHTHALEIN. 52. 12M Ammonia is a weak alkali. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 53. Which characteristics describe an acid? A) Sour, indicator turns red, pH greater than 7. B) Neutral, pH of 7. C) Bitter, slippery, indicator turns blue, pH greater than 7, produces hydroxide ions (OH$^{-}$). D) Sour, indicator turns red, pH less than 7, produces hydrogen ions (H$^{+}$). Show Answer Correct Answer: D) Sour, indicator turns red, pH less than 7, produces hydrogen ions (H$^{+}$). 54. Which pH has the most hydrogen ions (H+)? A) 10. B) 2. C) 13. D) 7. Show Answer Correct Answer: B) 2. 55. Which of the following is neutral? A) Gummy worms. B) Milk. C) Pure water. D) Eggs. Show Answer Correct Answer: C) Pure water. 56. Protein synthesis is main function of A) T-RNA. B) R-RNA. C) M-RNA. D) All types of RNA. Show Answer Correct Answer: D) All types of RNA. 57. Which statement is true when acids and bases are mixed together? A) They neutralize each other. B) Bases become stronger. C) There is no change. D) Acids become stronger. Show Answer Correct Answer: A) They neutralize each other. 58. What is the colour of litmus solution? A) Pink. B) Green. C) Blue. D) Purple. Show Answer Correct Answer: D) Purple. 59. How do Bronsted-Lowry conjugate acid-base pairs differ? A) Differ by some number of H$^{+}$. B) Differ by one H$^{+}$. C) Differ by two H$^{+}$. D) Differ by one OH$^{-}$. Show Answer Correct Answer: B) Differ by one H$^{+}$. 60. Nucleotide of adenine bis called A) Adenine. B) Adenosine. C) Adenine sugar. D) Adenylic acid. Show Answer Correct Answer: D) Adenylic acid. ← PreviousNext →Related QuizzesScience QuizzesClass 7 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books