This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 29 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 29 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Sulfurous acid A) HSO $ _ {3} $. B) H$_{2}$SO$_{3}$. C) H$_{2}$SO4. D) H3SO4. Show Answer Correct Answer: B) H$_{2}$SO$_{3}$. 2. Number of chromosomes in human beings A) 23. B) 23 pairs. C) 22 pairs. D) 40. Show Answer Correct Answer: B) 23 pairs. 3. What is the formula for sulfuric acid? A) H$_{2}$S. B) HS. C) H$_{2}$SO$_{4}$. D) H$_{2}$SO$_{3}$. Show Answer Correct Answer: C) H$_{2}$SO$_{4}$. 4. In RNA, uracil takes the place of the DNA nitrogen base called A) Guanine. B) Cytosine. C) Thymine. D) Adenine. Show Answer Correct Answer: C) Thymine. 5. Which substance is used in automobile battery? A) Sulphuric acid. B) Citric acid. C) Vinegar. D) Sodium hydroxide. Show Answer Correct Answer: A) Sulphuric acid. 6. Sodium hydroxide is used A) As an antacid. B) In manufacture of soap. C) As a cleansing agent. D) In alkaline batteries. Show Answer Correct Answer: B) In manufacture of soap. 7. Which of these is not found in DNA? A) Adenine. B) Thymine. C) Phosphate. D) Within limits. Show Answer Correct Answer: D) Within limits. 8. A substance is found to have the following characteristics:Very bitter taste Feels slippery to the touch Produces OH-ions when dissolved in water In what category would the substance be classified? A) Acid. B) Base. C) Enzyme. D) Fatty acid. Show Answer Correct Answer: B) Base. 9. What is the pH range of an acid? A) 4-6. B) 1-7. C) 1-6. D) 8-14. Show Answer Correct Answer: C) 1-6. 10. What is the first use of mineral acid? A) To separate silver and gold. B) To hurt people. C) To produce cleaning product. D) To separate acids and alkalis. Show Answer Correct Answer: A) To separate silver and gold. 11. What is the name of H$_{2}$SO$_{3}$? A) Sulfuric Acid. B) Sulfurous Acid. C) Hydrosulfuric Acid. D) Hydrosulfurous Acid. Show Answer Correct Answer: B) Sulfurous Acid. 12. Acid present in ant bite A) Nitric acid. B) Hydrochloric acid. C) Formic acid. D) Sulphuric acid. Show Answer Correct Answer: C) Formic acid. 13. Which one of these is an alkali? A) Lemon juice. B) Oven cleaner. C) Sugar solution. D) Vinegar. Show Answer Correct Answer: B) Oven cleaner. 14. Which of the following describes a battery? A) Acid. B) Base. C) All the above. D) None of the above. Show Answer Correct Answer: A) Acid. 15. What will be the resulting mRNA from this DNA sequence:GAT-TAC-AGA-TTA-CAT? A) CTA-ATG-TCT-AAT-GTA. B) Gau-ug-ug-uga. C) Cua-Au-uc-Au-Gua. D) Cat-Aca-Tac-so-Tag. Show Answer Correct Answer: C) Cua-Au-uc-Au-Gua. 16. Organic acids are present ..... in the ..... we consume. A) Physically and chemically. B) Directly and liquid. C) Naturally and food items. D) Both a and c. Show Answer Correct Answer: C) Naturally and food items. 17. What salt is produced if you react sodium hydroxide with hydrochloric acid? A) Sodium hydroxide. B) Sodium sulfate. C) Sodium nitrate. D) Sodium chloride. Show Answer Correct Answer: D) Sodium chloride. 18. Which of the following are examples of protein? A) Cutin, waxes, fats, oils. B) Collagen, enzymes, hemoglobin, insulin, and antibodies. C) Dna and rna. D) Glucose, sucrose, glycogen, and cellulose. Show Answer Correct Answer: B) Collagen, enzymes, hemoglobin, insulin, and antibodies. 19. Which of the following word pairs correctly completes the sentence below? ..... are corrosive substances characterized as having a strong smell, a sour taste, and are able to give up a H$^{+}$ ion. A) Acids. B) Amphoteric Compound. C) Bases. D) Electrolyte. Show Answer Correct Answer: A) Acids. 20. What happens to the pH of an acid during neutralisation? A) It stays the same. B) It moves toward pH 1. C) It moves towards pH 7. D) It moves towards pH 14. Show Answer Correct Answer: C) It moves towards pH 7. 21. The color of the Phenaphthaline index in alkaline solvents ..... A) Pink. B) Orange. C) Yellow. D) Green. Show Answer Correct Answer: A) Pink. 22. In nucleic acids, nucleotides are connected with each other by A) Phosphate bond. B) Phoshpo diester bond. C) Peptide bond. D) Ester bond. Show Answer Correct Answer: B) Phoshpo diester bond. 23. Choose the nucleotide sequence of the RNA strand that would be complementary to the following strand:GTAGTCA A) Profile. B) ACGACTG. C) Sakyaagu. D) CATCAGT. Show Answer Correct Answer: C) Sakyaagu. 24. If we rub a slice of lemon on our palm what happens A) Skin will burn. B) Slight burning sensation. C) Skin color changes. D) Nothing happens. Show Answer Correct Answer: B) Slight burning sensation. 25. Name this:HCOOH A) Methanol. B) Methanoic acid. C) Methyl methanoate. D) None of the above. Show Answer Correct Answer: B) Methanoic acid. ← 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