This quiz works best with JavaScript enabled. Home > Grammar > Advanced > Syntax > Valency – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Valency Quiz 7 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Formula of "Hydrochloric Acid" A) HCL. B) HCL. C) HCi. D) HCl. Show Answer Correct Answer: D) HCl. 2. Silver ion A) +1. B) +2. C) +3. D) None of the above. Show Answer Correct Answer: A) +1. 3. A valence electron is what? A) The electron in the outer shell of an atom. B) The electron in the inner shell of an atom. C) The last electron. D) The first electron. Show Answer Correct Answer: A) The electron in the outer shell of an atom. 4. Phosphuros A) 3, 5. B) 2. C) 2, 4. D) 1. Show Answer Correct Answer: A) 3, 5. 5. Valency of carbon is A) 3. B) 4. C) 5. D) 6. Show Answer Correct Answer: B) 4. 6. The formula of ammonium ion is A) NH$_{3}$. B) NH$_{3}$$^{+}$. C) NH$_{4}$. D) NH$_{4}$$^{+}$. Show Answer Correct Answer: D) NH$_{4}$$^{+}$. 7. Name the following compound.KOH A) Potassium monohydroxide. B) Potassium hydroxide. C) Monopotassium monohydroxide. D) None of the above. Show Answer Correct Answer: B) Potassium hydroxide. 8. Balance this equation ..... N$_{2 }$+ ..... H$_{2 }$$\rightarrow$ ..... NH$_{3}$ A) 1, 2, 3. B) 1, 3, 2. C) 1, 1, 2. D) 2, 1, 1. Show Answer Correct Answer: B) 1, 3, 2. 9. In H2CO3 valency of CO3 is 2. A) Correct. B) Incorrect. C) Unknown. D) Partially correct. Show Answer Correct Answer: A) Correct. 10. How do you calculate the valency of an element? A) Valency is the total number of protons in an atom. B) Valency is calculated based on the number of electrons in the outer shell of an atom. C) Valency is determined by the atomic mass of an element. D) Valency is calculated by the number of neutrons in the nucleus. Show Answer Correct Answer: B) Valency is calculated based on the number of electrons in the outer shell of an atom. 11. The motion energy of particles is called ..... A) Kinetic energy. B) Connecting energy. C) Electrostatic energy. D) Gravitational energy. Show Answer Correct Answer: A) Kinetic energy. 12. What is the valency of Potassium? A) 1. B) 2. C) 3. D) None of the above. Show Answer Correct Answer: A) 1. 13. Pb is the chemical symbol for A) Potassium. B) Lead. C) Silver. D) Gold. Show Answer Correct Answer: B) Lead. 14. Which of the following is a trivalent element? A) Potassium. B) Sodium. C) Aluminium. D) Barium. Show Answer Correct Answer: C) Aluminium. 15. What is the formula for Magnesium Fluoride? A) Mg$_{2}$F. B) 2Mg$_{2}$F. C) MgF$_{2}$. D) MgF$_{3}$. Show Answer Correct Answer: C) MgF$_{2}$. 16. What is the molecular formula of aluminium oxide? A) Al$_{2}$O$_{3}$. B) AlO. C) Al2O. D) AlO3. Show Answer Correct Answer: A) Al$_{2}$O$_{3}$. 17. Silicon A) 1. B) 2. C) 4. D) 3.5. Show Answer Correct Answer: C) 4. 18. How many valence electrons do the elements in the Noble Gases group have? A) 18. B) 7. C) 17. D) 8. Show Answer Correct Answer: D) 8. 19. Which of the following elements have two valence electrons A) Magnesium. B) Oxygen. C) Sulphur. D) None of the above. Show Answer Correct Answer: A) Magnesium. 20. An atom has four shells and 19 protons in its atom, what is its valency? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: A) 1. 21. K $^{I }$+ Br $^{I}$ A) Bkr. B) K$_{2}$Br$_{3}$. C) KBr. D) PottasiumBr$^{2+}$. Show Answer Correct Answer: C) KBr. 22. Chemical formula for calcium chloride is A) CaCl2. B) CaCl. C) Ca2Cl. D) ClCa. Show Answer Correct Answer: A) CaCl2. 23. Symbol of Magnesium A) Mn. B) Mo. C) Mg. D) Ma. Show Answer Correct Answer: C) Mg. 24. Is Iron (Fe) an element or a compound? A) Element. B) Compound. C) All the above. D) None of the above. Show Answer Correct Answer: A) Element. 25. How many valence electrons does nitrogen have? A) 3. B) 5. C) 7. D) 4. Show Answer Correct Answer: B) 5. ← PreviousNext →Related QuizzesAdvanced QuizzesGrammar QuizzesValency Quiz 1Valency Quiz 2Valency Quiz 3Valency Quiz 4Valency Quiz 5Valency Quiz 6Valency Quiz 8Valency Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books