This quiz works best with JavaScript enabled. Home > Grammar > Advanced > Syntax > Valency – Quiz 10 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Valency Quiz 10 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How many valence electrons are in an atom of Ba? A) 2. B) 8. C) 4. D) 1. Show Answer Correct Answer: A) 2. 2. The chemical symbol for Sodium is A) S. B) Sd. C) Nu. D) Na. Show Answer Correct Answer: D) Na. 3. Double headed arrows in chemical reactions indicate A) Irreversible Reaction. B) Reversible Reaction. C) Balanced chemical equation. D) Skeleton equation. Show Answer Correct Answer: B) Reversible Reaction. 4. What phase is this describing?Has no definite shape, Has a definite volume, Particles move quickly, Particles have strong forces between them A) Solid. B) Liquid. C) Gas. D) None!. Show Answer Correct Answer: B) Liquid. 5. Which subatomic particle has a negative charge? A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: C) Electron. 6. How many electrons, protons and neutrons will be present in X-, if atomic number of X is 9 and mass number is 19? A) E = 9, P = 9, N = 10. B) E = 10, P = 9, N = 10. C) E = 10, P = 10, N = 10. D) E = 9, P = 10, N = 10. Show Answer Correct Answer: B) E = 10, P = 9, N = 10. 7. Hydrogen A) 0. B) 1. C) 2. D) None of the above. Show Answer Correct Answer: B) 1. 8. $PbO_2^{-2}$ A) Peroxide. B) Permanganate. C) Plumbite. D) Dichromate. Show Answer Correct Answer: C) Plumbite. 9. An example of an element which shows variable valency and an element which does not is A) Cu and Fe. B) Cu and Sn. C) Fe and Al. D) Fe and Pb. Show Answer Correct Answer: C) Fe and Al. 10. Boron A) 1. B) 2. C) 3. D) None of the above. Show Answer Correct Answer: C) 3. 11. The Valency of a group 6 element is A) 2. B) 3. C) 5. D) 6. Show Answer Correct Answer: A) 2. 12. Argon is an inert gas because ..... A) Its octet is completed. B) It does not react with other substances. C) Its valency is zero. D) All of the above. Show Answer Correct Answer: D) All of the above. 13. Mg$^{2+}$ and Cl$^{-}$ create ..... A) Mg$_{2}$Cl$_{}$. B) Mg$_{}$Cl$_{}$$_{2}$. C) Mg$_{2}$Cl$_{}$$_{2}$. D) Mg$_{}$Cl$_{}$. Show Answer Correct Answer: B) Mg$_{}$Cl$_{}$$_{2}$. 14. MgO represents A) Magnesium Hydroxide. B) Magnesium Chloride. C) Magnesium Oxide. D) Sodium Nitrate. Show Answer Correct Answer: C) Magnesium Oxide. 15. Symbol of "Sodium" A) Na. B) Na. C) K. D) HCL. Show Answer Correct Answer: A) Na. 16. Which of the following about cations is correct? A) Cations where named after cats. B) Cations form when an atom has a mostly empty outer shell. C) Cations are only non-metals. D) Cations are mostly negative. Show Answer Correct Answer: B) Cations form when an atom has a mostly empty outer shell. 17. Which element or radical is a Trivalent cation A) Sulphite. B) Dichromate. C) Nickel. D) Chromium. Show Answer Correct Answer: D) Chromium. 18. Aluminium ion A) +1. B) +2. C) +3. D) None of the above. Show Answer Correct Answer: C) +3. 19. What is the relationship between valency and the periodic table? A) Valency is the same for all elements regardless of their group. B) Valency is determined solely by an element's atomic mass. C) Valency has no relation to an element's position in the periodic table. D) Valency is related to an element's group number in the periodic table, influencing its bonding behavior. Show Answer Correct Answer: D) Valency is related to an element's group number in the periodic table, influencing its bonding behavior. 20. Ca is the chemical symbol for A) Carbon. B) Calcium. C) Chlorine. D) Copper. Show Answer Correct Answer: B) Calcium. 21. Which of these following pairs is correct? A) Silver-Au. B) Gold-Ag. C) Tin-Sn. D) None of the above. Show Answer Correct Answer: C) Tin-Sn. 22. How many valence electrons does carbon have? A) 6. B) 2. C) 8. D) 4. Show Answer Correct Answer: D) 4. 23. Which ion has a valency of 2? A) Nitrate. B) Sulfate. C) Hydroxide. D) Chloride. Show Answer Correct Answer: B) Sulfate. 24. How does the number of valence electrons affect an element's reactivity? A) Elements with more valence electrons are always less reactive. B) Valence electrons have no impact on an element's reactivity. C) The number of protons determines reactivity, not valence electrons. D) The number of valence electrons affects an element's reactivity by influencing its ability to gain, lose, or share electrons. Show Answer Correct Answer: D) The number of valence electrons affects an element's reactivity by influencing its ability to gain, lose, or share electrons. 25. Formulae of Zinc Oxide A) ZnO. B) ZnOH. C) OZn. D) ZnCl. Show Answer Correct Answer: A) ZnO. 26. The valency of phosphorous in PCl$_{3 }$and PCl$_{5 }$is A) 3 & 5. B) 5 & 3. C) 5 only. D) 3 only. Show Answer Correct Answer: A) 3 & 5. 27. Sulphur A) 4. B) 3. C) 2. D) None of the above. Show Answer Correct Answer: C) 2. 28. What is the valency of Copper in its cupric form? A) 2. B) 3. C) 4. D) 1. Show Answer Correct Answer: A) 2. 29. What is the formula of nitric acid? A) H$_{2}$SO$_{4}$. B) HNO$_{3}$. C) HCl. D) Hno$_{3}$. Show Answer Correct Answer: B) HNO$_{3}$. 30. What is a chemical formula? A) Symbolic representation of a chemical compound. B) Biological process. C) Physical constant. D) Mathematical equation. Show Answer Correct Answer: A) Symbolic representation of a chemical compound. ← 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