This quiz works best with JavaScript enabled. Home > Grammar > Advanced > Syntax > Valency – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Valency Quiz 1 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the valency of Aluminium? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: C) 3. 2. Phosphate ion A) -1. B) -2. C) -3. D) None of the above. Show Answer Correct Answer: C) -3. 3. What is the atomic weight of water? A) 44 amu. B) 100 amu. C) 18 amu. D) 17 amu. Show Answer Correct Answer: C) 18 amu. 4. What are valence electrons? A) Electrons that are responsible for the mass of an atom. B) Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding. C) Electrons that are involved in thermal conductivity. D) Electrons that are only found in the nucleus of an atom. Show Answer Correct Answer: B) Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding. 5. What is the valency of the sulphate radical? A) -2. B) +2. C) -1. D) +1. Show Answer Correct Answer: A) -2. 6. What is the electronic configuration of hydrogen according to Bohr's model? A) 1. B) 4. C) 3. D) 2. Show Answer Correct Answer: A) 1. 7. Which of the following elements has a valency of 2? A) Iron. B) Calcium. C) Oxygen. D) Carbon. Show Answer Correct Answer: B) Calcium. 8. What is the formula of the compound formed between magnesium and oxygen? A) MgO. B) Mg$_{2}$O$_{2}$. C) MgO$_{2}$. D) Mg$_{2}$O. Show Answer Correct Answer: A) MgO. 9. The electronic configuration of Neon is A) 2, 8. B) 2, 7. C) 2, 8, 8. D) 2, 6. Show Answer Correct Answer: A) 2, 8. 10. Magnesium ion (Select the correct charge) A) +1. B) +2. C) +3. D) None of the above. Show Answer Correct Answer: B) +2. 11. What is the valency of Iron in its ferrous form? A) 4. B) 3. C) 1. D) 2. Show Answer Correct Answer: D) 2. 12. Which of the following is a movalent cation? A) Cuprous. B) Manganous. C) Ferrous. D) Stannous. Show Answer Correct Answer: A) Cuprous. 13. Sodium chloride formula is A) NaCl$_{2}$. B) Na2Cl$_{2}$. C) NaCl. D) Na(Cl)$_{2}$. Show Answer Correct Answer: C) NaCl. 14. Carbonate ion A) -1. B) -2. C) -3. D) None of the above. Show Answer Correct Answer: B) -2. 15. If I gain electrons I become A) Positive because I've added to my atom. B) Negative because I've added electrons. C) Same because i'm balanced. D) Equal because now I have electrons. Show Answer Correct Answer: B) Negative because I've added electrons. 16. Ammonium ion (Select the correct charge) A) +1. B) +2. C) +3. D) None of the above. Show Answer Correct Answer: A) +1. 17. Valency of bicarbonate is A) +1. B) -1. C) +2. D) -2. Show Answer Correct Answer: B) -1. 18. Which of the following correctly represents the electronic distribution in the Mg atom? . A) 3, 8, 1. B) 2, 8, 2. C) 1, 8, 3. D) 8, 2, 2. Show Answer Correct Answer: B) 2, 8, 2. 19. Valency of an atom definedas A) No.of electrons in the innermost shell. B) No. of protons in an atom. C) Combining capacity of an atom. D) No. Of neutrons in an atom. Show Answer Correct Answer: C) Combining capacity of an atom. 20. The element with atomic number 9 is ..... A) Oxygen. B) Neon. C) Sodium. D) Fluorine. Show Answer Correct Answer: D) Fluorine. 21. What is the electronic configuration of oxygen? A) 2.4. B) 2.6. C) 2.8.1. D) 2.8.8.1. Show Answer Correct Answer: B) 2.6. 22. Same number of protons, different number of neutrons A) Atomic number. B) Mass number. C) Isotope. D) Ion. Show Answer Correct Answer: C) Isotope. 23. Valency of Platinous A) $Pt^{+2}$. B) $Pt^{-2}$. C) $Pb^{-1}$. D) $Pb^{-2}$. Show Answer Correct Answer: A) $Pt^{+2}$. 24. What is the valency of Sodium? A) 1. B) 2. C) 3. D) None of the above. Show Answer Correct Answer: A) 1. 25. Which of the following are ions? A) Ca$^{2+}$. B) Cl$^{-}$. C) CO$_{3}$$^{2-}$. D) All of the above. Show Answer Correct Answer: D) All of the above. Next →Related QuizzesAdvanced QuizzesGrammar QuizzesValency Quiz 2Valency Quiz 3Valency Quiz 4Valency Quiz 5Valency Quiz 6Valency Quiz 7Valency Quiz 8Valency Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books