This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 8 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If the soil is acidic what we should do to make it neutral A) Add salt. B) Add acid. C) Add base. D) Add sugar. Show Answer Correct Answer: C) Add base. 2. All molecular formula below are carboxylic acid, except A) C$_{5}$H$_{10}$O$_{2}$. B) CH$_{3}$COOH. C) COOHC$_{2}$H$_{5}$. D) C$_{6}$H$_{14}$O$_{2}$. E) COOH-CH$_{3}$-COOH. Show Answer Correct Answer: D) C$_{6}$H$_{14}$O$_{2}$. 3. What is used to neutralize acidity in soil A) Sodium hydroxide. B) Magnesium hydroxide. C) Calcium hydroxide. D) Acetic acid. Show Answer Correct Answer: C) Calcium hydroxide. 4. Adenine, Thymine, Guanine and Cytosine are what? A) Phosphates. B) Sugars. C) Nucleotides. D) Bases. Show Answer Correct Answer: D) Bases. 5. Is the following compound an acid or a base? Ca(OH)$_{2}$ A) Acid. B) Base. C) All the above. D) None of the above. Show Answer Correct Answer: B) Base. 6. Acids are found on the pH scale between which numbers? A) 0-7. B) 7. C) 7-14. D) 19-42. Show Answer Correct Answer: A) 0-7. 7. Which of the following is NOT a characteristic of an acid? A) Sour taste. B) Corrosive. C) Turns litmus paper blue. D) Neutralises bases. Show Answer Correct Answer: C) Turns litmus paper blue. 8. Which of the following statements about acids is true? A) They taste sweet. B) They taste sour. C) They have a pH between 8-14. D) None of the above. Show Answer Correct Answer: B) They taste sour. 9. What is the function of mRNA? A) To get message from DNA. B) The find correct amino acid. C) To help attach codons and anti-codons at ribosome. D) Make DNA. Show Answer Correct Answer: A) To get message from DNA. 10. What type of reaction is the following:HCl + Zn $\rightarrow$ ZnCl$_{2}$ + H$_{2}$ A) Neutralization. B) Acid and a metal. C) Acid and a carbonate. D) Ionic. Show Answer Correct Answer: B) Acid and a metal. 11. Which of the following contains Malic Acid? A) Grapes. B) Milk. C) Apple. D) Oranges. E) Lactic. Show Answer Correct Answer: C) Apple. 12. Which of the following substances contain acid? A) An orange. B) Bleach. C) Distilled water. D) Washing powder. Show Answer Correct Answer: A) An orange. 13. What other laboratory substance can you use to test if colourless substance is an acid or an alkali? A) Catalyst. B) Salt. C) Universal Indicator. D) Water. Show Answer Correct Answer: C) Universal Indicator. 14. According to Bronsted-Lowry, what does an acid do? A) It donates a proton (H$^{+}$). B) It accepts a proton (H$^{+}$). C) It produces H$^{+}$ in water. D) It produces OH$^{-}$ in water. Show Answer Correct Answer: A) It donates a proton (H$^{+}$). 15. What is the formula for hydrofluoric acid? A) HFO. B) HFO$_{3}$. C) HF. D) H$_{2}$FO$_{3}$. Show Answer Correct Answer: C) HF. 16. A salt is formed when nitric acid combines with sodium hydroxide. What is the name of the salt? A) Sodium chloride. B) Sodium nitrate. C) Hydrogen Nitrate. D) Unique. Show Answer Correct Answer: B) Sodium nitrate. 17. What is the formula for nitrous acid? A) HNO$_{3}$. B) HNO$_{4}$. C) HNO$_{2}$. D) HNO. Show Answer Correct Answer: C) HNO$_{2}$. 18. How Many Types Of Acids Are There A) 1. B) 3. C) 5. D) 4. Show Answer Correct Answer: D) 4. 19. What color does acid turn litmus paper? A) It turns litmus paper purple. B) It turns red litmus paper blue. C) It turns blue litmus paper blue. D) It turns blue litmus paper red. Show Answer Correct Answer: D) It turns blue litmus paper red. 20. Which of the following compound react with acid to release CO$_{2}$?NaCl, CaSO$_{4, }$CaCO$_{3}$, MgSO$_{4}$ A) NaCl. B) Case $ _ {4} $. C) CaCO$_{3}$. D) MgSO$_{4}$. Show Answer Correct Answer: C) CaCO$_{3}$. 21. The main function of tRNA is to ..... A) Carry a message that, when translated, forms proteins. B) Form a portion of ribosomes. C) String together complementary RNA and DNA strands. D) Bring amino acids from the cytoplasm to the ribosomes. Show Answer Correct Answer: D) Bring amino acids from the cytoplasm to the ribosomes. 22. PH is the measure of the concentration of ..... A) Acids. B) H+ ion. C) OH-ion. D) Bases. Show Answer Correct Answer: B) H+ ion. 23. Complete the following reaction:Sulphuric acid + sodium carbonate $\rightarrow$ A) Carbon dioxide + water. B) Calcium carbonate + water + carbon dioxide. C) Sodium sulphate + water + carbon dioxide. D) Sodium chloride + water + carbon dioxide. Show Answer Correct Answer: C) Sodium sulphate + water + carbon dioxide. 24. Nitrogen Bases for DNA: A) Adenine, Guanine, Cytosine, and Uracil. B) Adenine, Guanine, Cytosine, and Phosphate. C) Adenine, Guanine, Cytosine, and Thymine. D) Adenine, Guanine, Cytosine, and Sulfur. Show Answer Correct Answer: C) Adenine, Guanine, Cytosine, and Thymine. 25. Which of the following pH values would be the weakest acid? A) 1. B) 3. C) 5. D) 6. Show Answer Correct Answer: D) 6. ← 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 9Class 7 Science Chapter 4 Acids Quiz 10Class 7 Science Chapter 4 Acids Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books