This quiz works best with JavaScript enabled. Home > Grammar > Advanced > Syntax > Valency – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Valency Quiz 15 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Argon A) 0. B) 1. C) 4. D) None of the above. Show Answer Correct Answer: A) 0. 2. Which problem is balanced? A) PbO$_{2}$ + 2H$_{2}$$\rightarrow$ H$_{2}$SO$_{4}$. B) SO$_{2}$ + H$_{2}$0 $\rightarrow$ H$_{2}$SO$_{4}$. C) 2Na + 2H$_{2}$O $\rightarrow$ 2NaOH + H$_{2}$. D) 2Na + 2H$_{2}$O $\rightarrow$ 2NaOH + H. Show Answer Correct Answer: C) 2Na + 2H$_{2}$O $\rightarrow$ 2NaOH + H$_{2}$. 3. Determine the valency of chlorine in HCl. A) 2. B) 3. C) 4. D) 1. Show Answer Correct Answer: D) 1. 4. The capacity of the M shell is ..... , but in Potassium, the M shell holds ..... electrons. A) 2 electrons, 8. B) 18 electrons, 8. C) 8 electrons, 18. D) 32 electrons, 18. Show Answer Correct Answer: B) 18 electrons, 8. 5. What is the chemical formula of Magnesium chloride? A) MgCl. B) MgCl$_{2}$. C) MgC. D) MgC$_{2 }$. Show Answer Correct Answer: B) MgCl$_{2}$. 6. The name of KHCO$_{3}$ is A) Potassium carbonate. B) Potassium hydrogencarbonate. C) All the above. D) None of the above. Show Answer Correct Answer: B) Potassium hydrogencarbonate. 7. I am an important element needed for the survival of all the organisms. I have 8 electrons. My valency is A) 0. B) 1. C) 2. D) 3. Show Answer Correct Answer: C) 2. 8. Valency of nitride is A) -1. B) -2. C) -3. D) -4. Show Answer Correct Answer: C) -3. 9. The innermost energy level has a maximum of how many electrons? A) 1. B) 2. C) 6. D) 8. Show Answer Correct Answer: B) 2. 10. NaHCO$_{3 }$represents A) Sodium bicarbonate. B) Sodium carbonate. C) Sodium Chloride. D) Calcium Carbonate. Show Answer Correct Answer: A) Sodium bicarbonate. 11. What is the electronic configuration of oxygen according to Bohr's model? A) 2-6. B) 2-2. C) 2-8. D) 2-4. Show Answer Correct Answer: A) 2-6. 12. What is the name of this ion? SO$_{4}$$^{2-}$ A) Sulfur tetroxide ion. B) Sulfonate. C) Sulfate. D) Sulfide. Show Answer Correct Answer: C) Sulfate. 13. How many valence electrons are in an atom of Se? A) 2. B) 8. C) 6. D) 5. Show Answer Correct Answer: C) 6. 14. What happens when water evaporates? A) Particles of the water vapour lose energy to their surroundings. B) Particles of the water vapour are spaced further apart. C) The speed of the particles of the water increases. D) The temperature of the remaining water rises. Show Answer Correct Answer: B) Particles of the water vapour are spaced further apart. 15. 'Si' is the symbol of ..... element. A) Sulphur. B) Silicon. C) Silver. D) None of the above. Show Answer Correct Answer: B) Silicon. 16. What is the definition of valency? A) The number of protons in an atom. B) The number of electrons in an atom. C) The combining capacity of an element. D) The number of neutrons in an atom. Show Answer Correct Answer: C) The combining capacity of an element. 17. Which of the following is an electropositive trivalent ion? A) Magnesium. B) Chromium. C) Nickel. D) Cobalt. Show Answer Correct Answer: B) Chromium. 18. What is the valency of Lithium? A) 1. B) 2. C) 3. D) None of the above. Show Answer Correct Answer: A) 1. 19. "I went home early yesterday." The word in italic is: A) Theme. B) Location. C) Goal. D) Agent. Show Answer Correct Answer: B) Location. 20. True or False:Law of conservation of energy states that matter can neither be created nor destroyed A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 21. Number of valency in Manganic A) 4+. B) 3+. C) 4-. D) 2-. Show Answer Correct Answer: A) 4+. 22. CaCO$_{3 }$represents A) Sodium bicarbonate. B) Sodium carbonate. C) Sodium Chloride. D) Calcium Carbonate. Show Answer Correct Answer: D) Calcium Carbonate. 23. What is the atomic number? A) The number of protons. B) The number of protons and neutrons. C) The number of neutrons. D) The number of protons and electrons. Show Answer Correct Answer: A) The number of protons. 24. Ionic Bonding is the electrostatic force of attraction between: A) Two non-metals. B) A metal ion and a non-metal ion. C) Molecules of water. D) Protons and neutrons in the nucleus. Show Answer Correct Answer: B) A metal ion and a non-metal ion. 25. What is the charge of an atom that has gained one electron? A) -1. B) -2. C) +1. D) +2. Show Answer Correct Answer: A) -1. ← PreviousNext →Related QuizzesAdvanced QuizzesGrammar QuizzesValency Quiz 1Valency Quiz 2Valency Quiz 3Valency Quiz 4Valency Quiz 5Valency Quiz 6Valency Quiz 7Valency Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books