This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 24 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 24 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Indicators A) Have a very high pH. B) Change colour to show the pH of a substance. C) Change colour in the presence of salts. D) Have a very low pH. Show Answer Correct Answer: B) Change colour to show the pH of a substance. 2. Protein synthesis is main function of A) T-RNA. B) R-RNA. C) M-RNA. D) All types of RNA. Show Answer Correct Answer: D) All types of RNA. 3. Vinegar is- A) Acetic Acid. B) Formic acid. C) Oxalic acid. D) Lactic acid. Show Answer Correct Answer: A) Acetic Acid. 4. Which statement is true when acids and bases are mixed together? A) Acids become stronger. B) Bases become stronger. C) There is no change. D) They neutralize each other. Show Answer Correct Answer: D) They neutralize each other. 5. What is the colour of litmus solution? A) Blue. B) Purple. C) Green. D) Pink. Show Answer Correct Answer: B) Purple. 6. How do Bronsted-Lowry conjugate acid-base pairs differ? A) Differ by one H$^{+}$. B) Differ by one OH$^{-}$. C) Differ by two H$^{+}$. D) Differ by some number of H$^{+}$. Show Answer Correct Answer: A) Differ by one H$^{+}$. 7. Nucleotide of adenine bis called A) Adenine. B) Adenosine. C) Adenylic acid. D) Adenine sugar. Show Answer Correct Answer: C) Adenylic acid. 8. Which substance is acting as a bronsted-Lowry base the reaction below?HF + NH$^{3 }$$\rightarrow$ NH$^{4}$+ + F A) HF. B) NH$_{3}$. C) NH$_{4}$$^{+}$. D) None of the above. Show Answer Correct Answer: B) NH$_{3}$. 9. ..... is/are used to build and repair muscle. A) Carbohydrates. B) Fiber. C) Protein. D) Fat. Show Answer Correct Answer: C) Protein. 10. The substance being dissolved in a solution. A) Mixture. B) Solute. C) Solvent. D) Solution. Show Answer Correct Answer: B) Solute. 11. The anion part in HNO$_{2}$ is A) Nitrite ion. B) Nitric ion. C) Nitrate ion. D) Nitrogen ion. Show Answer Correct Answer: A) Nitrite ion. 12. Boiling points of carboxylic acids is higher than those of corresponding alcohols.Is the above statement True or False? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 13. Nitric (HNO$_{3}$) is a A) Weak Acid. B) Weak Base. C) Strong Acid. D) Strong base. Show Answer Correct Answer: C) Strong Acid. 14. Which of the following is a weak base? A) Sodium hydroxide (NaOH). B) Ammonia (NH3). C) Potassium hydroxide (KOH). D) Calcium hydroxide (Ca(OH)2). Show Answer Correct Answer: B) Ammonia (NH3). 15. How many times a day must ATP be recycled to power a human body? A) 1-2 times a day. B) 500-1000 times a day. C) 1000-2000 times a day. D) 2000-3000 times a day. Show Answer Correct Answer: D) 2000-3000 times a day. 16. Which chemical is used to neutralise formic acid? A) Calcium hydroxide. B) Calcium chloride. C) Ammonium hydroxide. D) Sodium hydroxide. Show Answer Correct Answer: A) Calcium hydroxide. 17. Which of the following is NOT a nitrogen base found in DNA? A) Adenine. B) Thymine. C) Uracil. D) Guanine. Show Answer Correct Answer: C) Uracil. 18. 12 M ammonia solution is a stronger alkali than 1 M sodium hydroxide solution. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 19. Acid-base conjugate pairs differ by a single A) Electron. B) Proton. C) Neutron. D) Oxygen. Show Answer Correct Answer: B) Proton. 20. NaOH $\rightarrow$ Na$^{+}$ + OH$^{-}$In the equation above, NaOH acts as a(n) ..... A) Arrhenius acid. B) Arrhenius base. C) Bronsted-Lowry acid. D) Bronsted-Lowry base. Show Answer Correct Answer: B) Arrhenius base. 21. Are wasp stinks alkalis or acids? A) Acid. B) Alkalis. C) All the above. D) None of the above. Show Answer Correct Answer: B) Alkalis. 22. When the pH Scale is on 7, the Nature of the substance is- A) Acidic. B) Basic. C) Soluble. D) None of the Above. Show Answer Correct Answer: D) None of the Above. 23. The pH scale measures the concentration of hydroxide ions in a solution. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 24. What kinds of food can you get protein from in your diet? A) Eggs. B) Meat and Fish. C) Nuts and Legumes. D) All of the above. Show Answer Correct Answer: D) All of the above. 25. Strong acids and bases ..... A) Do not break apart into ions (non-electrolyte). B) Partially break apart into ions (weak electrolyte). C) Completely break apart into ions (non-electrolyte). D) Completely break apart into ions (strong electrolyte). Show Answer Correct Answer: D) Completely break apart into ions (strong electrolyte). ← 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