This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Acids – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Acids Quiz 5 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. An alkali is able to "cancel" out an acid. This process is also known as? A) Balancing. B) Extraction. C) Overcome. D) Neutralization. Show Answer Correct Answer: D) Neutralization. 2. What do we label a material or substance that falls at 7 on the pH scale? A) Neutral. B) Happy. C) Acid. D) Young. Show Answer Correct Answer: A) Neutral. 3. ..... are composed out of carbon (C), hydrogen (H), oxygen (O), nitrogen (N), and phosphorus (P) A) Carbohydrates. B) Lipids. C) Proteins. D) Nucleic Acids. Show Answer Correct Answer: D) Nucleic Acids. 4. When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil? A) Slaked lime. B) Quick lime. C) Calamine solution. D) Organic matter. Show Answer Correct Answer: D) Organic matter. 5. Sulfuric acid (a) A) H$_{2}$SO$_{3}$. B) H$_{2}$S. C) H$_{2}$SiO$_{3}$. D) A. H2SO4. Show Answer Correct Answer: D) A. H2SO4. 6. Nitric acid A) HNO$_{2}$. B) HNI3. C) HNO4. D) H$_{2}$NO3. Show Answer Correct Answer: B) HNI3. 7. In the folding of proteins, the amino acids that are hydrophilic will A) Stay in the middle. B) Move to the outside. C) Move to the inside. D) Not change. Show Answer Correct Answer: B) Move to the outside. 8. What happens when an acid and a base mix? A) Optimization. B) Equalization. C) Neutralization. D) Nebulization. Show Answer Correct Answer: C) Neutralization. 9. The color of litmus in neutral solution: A) Red. B) Blue. C) Purple. D) Green. Show Answer Correct Answer: C) Purple. 10. Name the acid:H$_{3}$PO$_{3}$ A) Hydrophosphoric acid. B) Phosphorous acid. C) Phosphoric acid. D) Phosphoric hydroxide. Show Answer Correct Answer: B) Phosphorous acid. 11. What two substance are formed when an acid and alkali react together in equal amounts? A) Salt and water. B) Alkali and water. C) Acid and water. D) Acid and alkali. Show Answer Correct Answer: A) Salt and water. 12. What completely ionizes in solution? A) Weak acids. B) Strong acids. C) Strong Salts. D) Neutral salts. Show Answer Correct Answer: B) Strong acids. 13. IF YOU DIP RED LITMUS PAPER INTO A SOLUTION AND IT TURNS BLUE. THE SOLUTION IS A) NUETRAL. B) ACID. C) BASE. D) NONE OF THESE. Show Answer Correct Answer: C) BASE. 14. Which of the following is a base? A) Baking soda in water. B) Orange juice. C) Vinegar. D) Lemonade. Show Answer Correct Answer: A) Baking soda in water. 15. What is the chemical formula of Sodium Hydroxide? A) NaCL. B) Nacl. C) NACL. D) NaCl. Show Answer Correct Answer: D) NaCl. 16. What is the formula for Acetic Acid? A) CH$_{3}$COO. B) HC$_{2}$H$_{3}$O$_{2}$. C) HCO. D) HCH $ _ {3} $ O $ _ {2} $. Show Answer Correct Answer: B) HC$_{2}$H$_{3}$O$_{2}$. 17. The nature of an antacid is A) Neutral. B) Acidic. C) Basic. D) Ampherteric. Show Answer Correct Answer: C) Basic. 18. What is the formula for hydrobromic acid? A) HBrO. B) HRO $ _ {2} $. C) HRO $ _ {3} $. D) HBr. Show Answer Correct Answer: D) HBr. 19. Indicators are- A) Substances which are nor Acidic or Basic. B) Substances that are used to test the Acidic or Basic nature of a substance. C) Substances which have both chemical and physical properties. D) None of the Above. Show Answer Correct Answer: B) Substances that are used to test the Acidic or Basic nature of a substance. 20. What substance could you use to test if a substance is an acid or alkali? A) Indicator. B) Salt. C) Catalyst. D) Water. Show Answer Correct Answer: A) Indicator. 21. What colour is pH neutral? A) Yellow. B) Orange. C) Red. D) Green. Show Answer Correct Answer: D) Green. 22. Bases turn yellow turmeric paper to ..... A) Green. B) Red. C) Pink. D) Orange. Show Answer Correct Answer: B) Red. 23. Amino acids all have the same general structure except for the: A) Amino Group. B) Carboxyl Group. C) 'R' Group. D) Carbonyl Group. Show Answer Correct Answer: C) 'R' Group. 24. Which is not a base? A) Magnesium hydroxide. B) Sodium hydroxide. C) Ammonium hydroxide. D) Vinegar. Show Answer Correct Answer: D) Vinegar. 25. Any substance that gives a visible sign, usually by a colour change A) Independent. B) Indicator. C) Isolated. D) Helium. Show Answer Correct Answer: B) Indicator. ← 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 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 10Class 7 Science Chapter 4 Acids Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books