This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 27 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 27 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The pH scale measures ..... A) The strength of an acid. B) The strength of hydrogen ions. C) The concentration of hydrogen ions. D) The concentration of an acid. Show Answer Correct Answer: C) The concentration of hydrogen ions. 2. Are these statements about amino acids true or false?In the solid state amino acids exists as zwitterions A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 3. How does an Antacid help? A) To correct excess acidity in stomach. B) To neutralize acidity in soil. C) To neutralize the effect of a bee sting. D) It is harmful. It doesn't help in anything. Show Answer Correct Answer: A) To correct excess acidity in stomach. 4. Select the formula for the following acid:hydrobromic acid A) HBr. B) HRO $ _ {4} $. C) HRO $ _ {3} $. D) None of the above. Show Answer Correct Answer: A) HBr. 5. When a hydrogen ion is released what does the solution become? A) Basic. B) Acidic. C) Ampherteric. D) Proton. Show Answer Correct Answer: B) Acidic. 6. Sodium hydrogen carbonate is used in fire extinguisher. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. If a solution is basic which ion will be more present? A) H+. B) K+. C) OH-. D) H-. Show Answer Correct Answer: C) OH-. 8. Why must we conduct standardization? A) Determine the true molarity of a substance. B) To find out the concentration of an unknown acid we are titrating. C) Because it is a fun lab. D) To find the neutral point of combining an acid and base. Show Answer Correct Answer: A) Determine the true molarity of a substance. 9. When nitric acid is added to magnesium metal a reaction occurs and a gas is produced. The products of this reaction are: A) Magnesium nitrate and hydrogen gas. B) Magnesium carbonate and carbon dioxide. C) Magnesium chloride and hydrogen gas. D) Magnesium sulphate and carbon dioxide. Show Answer Correct Answer: A) Magnesium nitrate and hydrogen gas. 10. When using the Arrhenius model, what types of ions indicate that a compound is a base? A) H$^{+1}$. B) OH$^{-1}$. C) All the above. D) None of the above. Show Answer Correct Answer: B) OH$^{-1}$. 11. Hydrangea, Petunia and geranium are A) Synthetic indicator. B) Acid. C) Base. D) Acid base indicators. Show Answer Correct Answer: D) Acid base indicators. 12. When a Base is added to litmus paper it turns ..... A) Blue. B) Red. C) Green. D) Orange. Show Answer Correct Answer: A) Blue. 13. What does the word 'alkali' means A) Bitter. B) The ashes. C) Sour. D) Burn. Show Answer Correct Answer: B) The ashes. 14. PH less than 7. A) Acids. B) Bases. C) All. D) None of the above. Show Answer Correct Answer: A) Acids. 15. Water can act as both an acid and a base according to the bronsted lowry model. This means water is A) Neutral. B) Conjugate. C) Ionic. D) Ampherteric. Show Answer Correct Answer: D) Ampherteric. 16. Carbonic acid (a) A) To.H2CO3. B) H $ _ {2} $ co $ _ {2} $. C) H$_{4}$C. D) H $ _ {2} $ co $ _ {4} $. Show Answer Correct Answer: A) To.H2CO3. 17. Produces a salt and water in a neutralization reaction A) Acid. B) Base. C) Both an acid and a base. D) None of the above. Show Answer Correct Answer: C) Both an acid and a base. 18. Binary acids start with " ..... " A) Acid. B) Nitric. C) Hydraulic. D) Hydro. Show Answer Correct Answer: D) Hydro. 19. Where is Ruheman's purple seen? A) Biuret Reaction. B) Benedict'ss reaction. C) Dansyl chloride reaction. D) Ninhydrin reaction. Show Answer Correct Answer: D) Ninhydrin reaction. 20. What is the name of the following acid:H$_{2}$SO$_{4}$ A) Hydrosulfuric acid. B) Sulfuric acid. C) Sulfurous acid. D) Persulfuric acid. Show Answer Correct Answer: B) Sulfuric acid. 21. If Copper sulphate pentahydrate is heated then, A) Crystal shape chnages. B) It becomes white. C) It becomes blue. D) None. Show Answer Correct Answer: B) It becomes white. 22. What type of solution does a base produce when dissolved in water? A) Acidic. B) Basic. C) Neutral. D) Salty. Show Answer Correct Answer: B) Basic. 23. H3PO4 A) Hydrophsophorus acid. B) Phosphoric acid. C) Hydrogen phosphorous. D) Phosphori hydroxide. Show Answer Correct Answer: B) Phosphoric acid. 24. Which of the following are properties of acids? A) They conduct electricity when dissolved in water. B) They taste sour. C) They react with metals to produce hydrogen gas. D) All of the answer choices are correct. Show Answer Correct Answer: D) All of the answer choices are correct. 25. What is the three base sequence of mRNA that codes for a single amino acid? A) Anticodon. B) Codon. C) Protein. D) None of the above. Show Answer Correct Answer: B) Codon. ← 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