This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 32 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 32 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. ..... are used to neutralise acid in the stomach. A) Toothpastes. B) Bacteria. C) Antacids. D) More strong acids. Show Answer Correct Answer: C) Antacids. 2. What is the range of pH values in an acidic solution? A) PH = 7. B) 7-14. C) 0-7. D) 0-14. Show Answer Correct Answer: C) 0-7. 3. Which of the following statement is or are correct? A) Ascorbic acid is present in amla and citrus fruit (lemon and oranges). B) Oxalic acid is present in spinach (palak). C) Tartaric acid is present in tamarind, unripe grapes and unripe mangoes. D) All the above. Show Answer Correct Answer: D) All the above. 4. When found in food, bases are ..... A) Sour. B) Bitter. C) Salty. D) Soggy. Show Answer Correct Answer: B) Bitter. 5. Before Factory wastes are disposed out to Waterbodies, why do they add basic substances? A) So that the Factory wastes decomposes in Waterbodies. B) Because they have Respect towards them. C) So that they do not harm the Aquatic animals and Plants. D) None of the Above. Show Answer Correct Answer: C) So that they do not harm the Aquatic animals and Plants. 6. Which of the following is the best description of a salt? A) Forms when two metals react. B) Forms when a carbonate reacts with sodium hydroxide. C) Forms when all or part of the hydrogen ions in an acid is replaced. D) Forms when two alkali reacts. Show Answer Correct Answer: C) Forms when all or part of the hydrogen ions in an acid is replaced. 7. The reaction between an acid and an alkali is A) Acidification. B) Condensation. C) Evaporation. D) Neutralization. Show Answer Correct Answer: D) Neutralization. 8. What does corrosive mean? A) That a substance is a strong base. B) That a substance is neutral. C) That a substance can easily wear away. D) The substance is the strongest acid. Show Answer Correct Answer: C) That a substance can easily wear away. 9. What is produced in the process of neutralisation? A) Salt. B) Acids & bases. C) Heat, Salt and water. D) Sugar, salt and heat. Show Answer Correct Answer: C) Heat, Salt and water. 10. An oxyacid is made up of hydrogen, ..... , and a third element A) Nitrogen. B) Oxygen. C) Carbon. D) Hydroxide. Show Answer Correct Answer: B) Oxygen. 11. An acid can be corrosive. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 12. Eggs are a complete protein. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 13. Bases are generally ..... to touch A) Hot. B) Cold. C) Soapy. D) Rough. Show Answer Correct Answer: C) Soapy. 14. Does Alkali's have chemical burn A) Yes. B) Noo. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 15. An acid present in aerated drinks is A) Carbonic acid. B) Lactic acid. C) Maleic acid. D) Formic acid. Show Answer Correct Answer: A) Carbonic acid. 16. When aqueous sodium carbonate (Na$_{2}$CO$_{3}$) with HCl(aq), it gives A) NaOH, H$_{2}$ (g) and CO$_{2}$(g). B) NaCl, H$_{2}$ O and CO$_{2}$(g). C) NaHCO$_{3}$, H$_{2}$ (g) and CO$_{2}$(g). D) NaHCO$_{3}$, H$_{2}$ O and CO$_{2}$(g). Show Answer Correct Answer: B) NaCl, H$_{2}$ O and CO$_{2}$(g). 17. Are all acids dangerous? A) Yes, all acids are dangerous because the dissolve metal. B) No, all acids are not dangerous. We can eat and drink things with acid. C) All the above. D) None of the above. Show Answer Correct Answer: B) No, all acids are not dangerous. We can eat and drink things with acid. 18. Hc $ _ {2} $ h $ {3} $ o $ {2} $ (a) A) A. Acetic acid. B) Acetous acid. C) Hydroacetic acid. D) Hydroacetous acid. Show Answer Correct Answer: A) A. Acetic acid. 19. Select the name for the following acid:H$_{2}$SO$_{3}$ A) Sulfurous acid. B) Sulfuric acid. C) Hydrosulfuric acid. D) None of the above. Show Answer Correct Answer: A) Sulfurous acid. 20. Tick the natural indicators A) Turmeric. B) Phenophthalien. C) Iodine solution. D) Methylene blue. Show Answer Correct Answer: A) Turmeric. 21. Which is the most likely pH for a solution of a weak acid? A) 1. B) 5. C) 11. D) 14. Show Answer Correct Answer: B) 5. 22. Strong acids and alkalis are ..... A) Sour. B) Sweet. C) Corrosive/Caustic. D) Burn litmus paper. Show Answer Correct Answer: C) Corrosive/Caustic. 23. Which is the correct order of boiling points of carboxylic acids, from the lowest to the highest? A) Methanoic acid, ethanoic acid, butanoic acid, propanoic acid. B) Methanoic acid, propanic acid, butanoic acid, ethanoic acid. C) Methanoic acid, ethanoic acid, propanoic acid, butanoic acid. D) Ethanoic acid, methanoic acid, propanoic acid, butanoic acid. Show Answer Correct Answer: C) Methanoic acid, ethanoic acid, propanoic acid, butanoic acid. 24. When using the Bronsted Lowry definition of acids and bases, the acid will ..... a hydrogen proton. A) Donate. B) Accept. C) All the above. D) None of the above. Show Answer Correct Answer: A) Donate. 25. You can eat or drink an acid. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. ← 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