This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 4 Bases – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 4 Bases Quiz 5 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the compounds below is an electrolyte? A) LiCl. B) CH$_{4}$. C) CH$_{3}$OH. D) Na. Show Answer Correct Answer: A) LiCl. 2. What is the meaning of the Greek base ortho? A) Crooked or wrong. B) Straight or correct. C) Bent or twisted. D) Unclear or vague. Show Answer Correct Answer: B) Straight or correct. 3. Neutralization occurs when these react with bases forming a salt and water A) Acid. B) Base. C) Neutral. D) None of the above. Show Answer Correct Answer: A) Acid. 4. What is a field? A) Data storage area. B) Stored data area. C) Specific data storage area, commonly columns. D) Column area. Show Answer Correct Answer: C) Specific data storage area, commonly columns. 5. H$^{+}$(aq) + OH$^{-}$(aq) $\rightarrow$ H$_{2}$O(l) ..... this shows what type of reaction? A) Thermal decomposition. B) Physical reaction. C) Neutralization. D) Acidification. Show Answer Correct Answer: C) Neutralization. 6. What is the name of the acid HNO$_{3}$ A) Hydro nitirc acid. B) Nitric acid. C) Nitroxy acid. D) Nitrate acid. Show Answer Correct Answer: B) Nitric acid. 7. What is the primary difference between a base and an alkali? A) Alkalis have a higher concentration of hydroxyl ions. B) Alkalis are soluble in water, while bases may not be. C) Bases are always more basic than alkalis. D) Bases are more reactive than alkalis. Show Answer Correct Answer: B) Alkalis are soluble in water, while bases may not be. 8. When you put an acidic solution into a basic solution ..... A) It creates a stronger base. B) They neutralize each other and the pH changes to closer to 7 (neutral). C) It explodes. D) It creates a stronger acid. Show Answer Correct Answer: B) They neutralize each other and the pH changes to closer to 7 (neutral). 9. According to Arrhenius acid-base theory, an acid is ..... A) An H+ acceptor. B) A H+ donor. C) A substance that produces H+ in water. D) Anything with an H+. Show Answer Correct Answer: C) A substance that produces H+ in water. 10. What occurs when an alkali is dissolved in water? A) It produces hydroxide ions (OH-). B) It produces hydrogen ions (H+). C) It becomes acidic. D) It remains neutral. Show Answer Correct Answer: A) It produces hydroxide ions (OH-). 11. What is the pH of a reaction between a strong acid and strong base? A) 0. B) 5. C) 10. D) 7. Show Answer Correct Answer: D) 7. 12. The root word meter (from Greek) means "measure." If you want to measure how hot or cold something is, just use a thermometer.If you want to measure how far your car has traveled, check the odometer.A "gasometer" is used for holding and ..... gas. A) Carrying. B) Measuring. C) Looking at. D) Sending. Show Answer Correct Answer: B) Measuring. 13. What does the Greek root "nym" mean? A) Light. B) Word. C) Small. D) Water. Show Answer Correct Answer: B) Word. 14. What is the meaning of the Greek base 'bio'? A) Life. B) Earth. C) Heat. D) Time. Show Answer Correct Answer: A) Life. 15. What is the colour of universal indicator in pure water? A) Red. B) Blue. C) Violet. D) Green. Show Answer Correct Answer: D) Green. 16. The three parts of a nucleotide are: A) Sugar, protein, letter from DNA alphabet. B) Sugar, phosphate, letter from DNA alphabet. C) Phosphate, protein, letter from DNA alphabet. D) Phosphate, sulphur, letter from DNA alphabet. Show Answer Correct Answer: B) Sugar, phosphate, letter from DNA alphabet. 17. Which letter pairs with-A A) C. B) G. C) T. D) None of the above. Show Answer Correct Answer: C) T. 18. Which substance has a bitter taste? A) Acids. B) Bases. C) All the above. D) None of the above. Show Answer Correct Answer: B) Bases. 19. Curd contains (a) ..... , whereas lime water has (b) ..... A) A= Citric acid ; b= Sodium hydroxide. B) A= Lactic acid ; b= Calcium hydroxide. C) A= Calcium hydroxide ; b= Lactic acid. D) None of these. Show Answer Correct Answer: B) A= Lactic acid ; b= Calcium hydroxide. 20. This theory is based on the molecular structure of substances. A) Arrhenius Theory. B) TEORIA DE BRONSTED-LOWRY. C) TEORIA THE LEWIS. D) N.A. Show Answer Correct Answer: C) TEORIA THE LEWIS. 21. Mg (oh) $ _ {2} $ is a name base: A) Magnesium hydroxide. B) Manganese hydroxide. C) Magnesium Hydroxide II. D) Manganese Hydroxide II. Show Answer Correct Answer: A) Magnesium hydroxide. 22. Maternity has to do with being a ..... A) Father. B) Friend. C) Sister. D) Mother. Show Answer Correct Answer: D) Mother. 23. What is the formula of nitric acid? A) HCl. B) H$_{2}$SO$_{4}$. C) HNO$_{3}$. D) H$^{+}$. Show Answer Correct Answer: C) HNO$_{3}$. 24. Write the formula for LiOH A) Lithium oxygen hydride. B) Lithium Hydroxide. C) Monolithium oxy hydride. D) Lithium oxide. Show Answer Correct Answer: B) Lithium Hydroxide. 25. In the DNA alphabet, T always pairs with: A) A. B) T. C) G. D) C. Show Answer Correct Answer: A) A. ← PreviousNext →Related QuizzesClass 7 Science Chapter 4 Bases Quiz 1Class 7 Science Chapter 4 Bases Quiz 2Class 7 Science Chapter 4 Bases Quiz 3Class 7 Science Chapter 4 Bases Quiz 4Class 7 Science Chapter 4 Bases Quiz 6Class 7 Science Chapter 4 Bases Quiz 7Class 7 Science Chapter 4 Bases Quiz 8Class 7 Science Chapter 4 Bases Quiz 9Class 7 Science Chapter 4 Bases Quiz 10Class 7 Science Chapter 4 Bases Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books