This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 33 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 33 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Sides or backbones of DNA molecules are made up of? A) Alternating sugars-phosphates. B) Nitrogen and Phosphate. C) Alternating sugar-sulfur. D) Carbon and Hydrogen. Show Answer Correct Answer: A) Alternating sugars-phosphates. 2. What is the name for the following compound? Ca(OH)$_{2}$ A) Calcous. B) Calcium hydroxide. C) Calcic. D) Calcium hydrogen oxygen. Show Answer Correct Answer: B) Calcium hydroxide. 3. What is the meaning of corrosive A) Nice. B) Healthy. C) Acid. D) To destroy slowly. Show Answer Correct Answer: D) To destroy slowly. 4. Which statement describes a base? A) Tastes Sour. B) Stays clear in Phenolphthalein. C) Turns magenta in Phenolphthalein. D) Turns litmus paper red. Show Answer Correct Answer: C) Turns magenta in Phenolphthalein. 5. If a solution is acidic, it can be neutralized by adding A) A stronger acid. B) Heat. C) A base. D) A weaker acid. Show Answer Correct Answer: C) A base. 6. Non Metallic oxides are called ..... A) Neutral oxides. B) Basic oxides. C) Acidic oxides. D) Amphoteric oxides. Show Answer Correct Answer: C) Acidic oxides. 7. Nucleic Acids are A) DNA and RNA. B) Polynucleotides. C) Polymers. D) All of these. Show Answer Correct Answer: D) All of these. 8. Soap is a weak base. What is true about the taste of bases? A) They taste sour. B) They taste sweet. C) They taste bitter. D) They taste salty. Show Answer Correct Answer: C) They taste bitter. 9. H $ _ {2} $ co $ _ {3} $ A) Carbonic acid. B) Hydrocarbonic acid. C) Carbonous acid. D) Hydrocarbonous acid. Show Answer Correct Answer: A) Carbonic acid. 10. Is the following compound an acid or a base?H$_{3}$PO$_{4}$ A) Acid. B) Base. C) All the above. D) None of the above. Show Answer Correct Answer: A) Acid. 11. Any number of the pH scale less than 7 is considered? A) An Acid. B) A healthy option. C) A neutral. D) Cleaning products. Show Answer Correct Answer: A) An Acid. 12. An acid reacts with metal to produce A) Carbon dioxide. B) Hydrogen gas. C) Hydrogen gas and water. D) Salt and hydrogen gas. Show Answer Correct Answer: D) Salt and hydrogen gas. 13. Which compound is prepared using Chlor Alkali process? A) Plaster of Paris. B) Bleaching Powder. C) Sodium hydroxide. D) Sodium carbonate. Show Answer Correct Answer: B) Bleaching Powder. 14. Which drug is used for indigestion? A) Antacid. B) Anti-Biatic. C) Anti-septic. D) Analyzistic. Show Answer Correct Answer: A) Antacid. 15. A beaker full of acid is added to a beaker full of base. The pH of the base will: A) Change constantly. B) Decrease. C) Increase. D) Stay the same. Show Answer Correct Answer: B) Decrease. 16. Does tablets have alkalis? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 17. What is the formula for nitric acid? A) HNO$_{3}$. B) HNO$_{2}$. C) HNO$_{4}$. D) NO. Show Answer Correct Answer: A) HNO$_{3}$. 18. Apples contain ..... A) Acetic acid. B) Sulphuric acid. C) Malic acid. D) None of the above. Show Answer Correct Answer: C) Malic acid. 19. Name this acid:HNO$_{2}$ A) Hydronitrous acid. B) Hydrogen nitrogen oxygen. C) Nitrous acid. D) Hyponitrous acid. Show Answer Correct Answer: C) Nitrous acid. 20. In an mRNA strand, the codon AAG codes for the amino acid, while GUU codes for the amino acid . A) Lysine (Lys), Valine (Val). B) Lysine (Lys), Leucine (Leu). C) Asparagine (Asn), Valine (Val). D) Arginine (Arg), Glutamine (Glu). Show Answer Correct Answer: A) Lysine (Lys), Valine (Val). 21. Malic acid is present in A) Lemon. B) Milk. C) Apple. D) Spinach. Show Answer Correct Answer: C) Apple. 22. Acids are bitter to taste A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 23. Write the formula for copper (I) phosphide? A) With $ _ {3} $ p. B) CuP. C) With $ _ {1} $ p. D) CuP$_{3}$. Show Answer Correct Answer: A) With $ _ {3} $ p. 24. Which base is ONLY found in DNA? A) Cytosine. B) Guanine. C) Thymine. D) Adenine. Show Answer Correct Answer: C) Thymine. 25. HBr A) Hydrogen bromine acid. B) Hydrobromide acid. C) Hydrobromic acid. D) None of the above. Show Answer Correct Answer: C) Hydrobromic 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