This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 25 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 25 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The alchemists claimed that ordinary metals can be transformed into gold. Is this claim true? Why or Why not? A) This claim is not true. Metals can be coated with other metals; not transformed. B) This claim is true! My steel nail is now gold. C) This claim is not true. No explanation necessary. D) This claim is true. Where is gold coming from, if not from alchemists?. Show Answer Correct Answer: A) This claim is not true. Metals can be coated with other metals; not transformed. 2. Which of the following is a natural indicator? A) China rose petal. B) Turmeric. C) Litmus. D) All of these. Show Answer Correct Answer: D) All of these. 3. What would be considered the weakest base? A) 8. B) 14. C) 7. D) 11. Show Answer Correct Answer: A) 8. 4. Rainwater is an acid. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 5. An element common to all acids isa) Chlorine (b) Nitrogen (c) Oxygen (d) Hydrogen A) A. B) B. C) C. D) D. Show Answer Correct Answer: D) D. 6. Indigestion occurs when A) Stomach acid rises into the oesophagus, causing burns, because it is corrosive. B) The pH in the stomach is too high, so the stomach lining is damaged. C) There is not enough stomach acid to digest food sufficiently. D) Stomach acid has reacted with carbonates to form carbon dioxide. Show Answer Correct Answer: A) Stomach acid rises into the oesophagus, causing burns, because it is corrosive. 7. Which item is an acid? A) Drain cleaner. B) Ammonia. C) An orange. D) None of the above. Show Answer Correct Answer: C) An orange. 8. Blue litmus paper is dipped in a solution but it remains blue. What could the nature of the solution be? A) Acidic. B) Basic. C) Neutral. D) Either (b) and (c). Show Answer Correct Answer: D) Either (b) and (c). 9. If we touch a piece of ice ..... A) Heavenly emanates into our body from ice. B) Heaven radiates from our body to a piece of ice. C) Does not emit heat. D) Cannot say. Show Answer Correct Answer: B) Heaven radiates from our body to a piece of ice. 10. The central carbon of an amino acid is called? A) Alpha carbon. B) Beta carbon. C) Chiral carbon. D) Asymmetric carbon. Show Answer Correct Answer: A) Alpha carbon. 11. Apple contains ..... acid A) Citric acid. B) Malic acid. C) Acetic acid. D) Oxalic acid. Show Answer Correct Answer: B) Malic acid. 12. These can burn you if they are strong enough. A) Acids. B) Bases. C) Water. D) Acids & Bases. Show Answer Correct Answer: D) Acids & Bases. 13. Turmeric paper is a natural ..... A) Salt. B) Acid. C) Base. D) Indicator. Show Answer Correct Answer: D) Indicator. 14. A solution changes the colour of turmeric indicator from yellow to red. The solution is- A) Basic. B) Acidic. C) Neutral. D) Either neutral or acidic. Show Answer Correct Answer: A) Basic. 15. It is used by doctors in the bandage that is to re-past the broken bones in our body. A) Plaster of Paris. B) Gypsum. C) Water. D) Washing soda. Show Answer Correct Answer: A) Plaster of Paris. 16. Colourless odourless gas evolved when HCl reacts with zinc A) Oxygen. B) Nitrogen. C) Argon. D) Hydrogen. Show Answer Correct Answer: D) Hydrogen. 17. Acid + Base=? + Water A) Indicator. B) Sugar. C) Salt. D) Food. Show Answer Correct Answer: C) Salt. 18. Hydrofluoric (HF) is a A) Weak Acid. B) Weak Base. C) Strong Acid. D) Strong base. Show Answer Correct Answer: A) Weak Acid. 19. What was red cabbage juice used as in the lab we performed? A) As an acid. B) As a base. C) As a colorant. D) As an indicator. Show Answer Correct Answer: D) As an indicator. 20. Give the acid name for H$_{2}$CO$_{3}$ A) Carbonous acid. B) Carbonic acid. C) Hydrocarbonic acid. D) Carbonate acid. Show Answer Correct Answer: B) Carbonic acid. 21. Butanoic acid is miscible (all soluble) in water A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 22. What is the name of the following acid:HCl A) Hydrochloric acid. B) Chloric acid. C) Perchloric acid. D) Chlorous acid. Show Answer Correct Answer: A) Hydrochloric acid. 23. The natural indicator litmus is obtained from ..... A) China rose. B) Cabbage. C) Moss. D) Lichen. Show Answer Correct Answer: D) Lichen. 24. A bronsted lowry acid A) Produces hydroxide ions in a solution. B) Is a proton donor. C) Produces hydrogen ions in a solution. D) Is a proton acceptor. Show Answer Correct Answer: B) Is a proton donor. 25. What elements make up Nucleic Acids? A) C, N, O, H, (S). B) C, N, O, H, P, (S). C) C, N, O, H, P. D) C, N, O. Show Answer Correct Answer: C) C, N, O, H, P. ← 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