This quiz works best with JavaScript enabled. Home > Grammar > Advanced > Syntax > Valency – Quiz 19 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Valency Quiz 19 (24 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Are there any compounds on the periodic table A) Yes there are many. B) No because only elements are on the periodic table. C) I think they are?. D) None of the above. Show Answer Correct Answer: B) No because only elements are on the periodic table. 2. SiO$_{2}$$^{2-}$is the valency for: A) Silicon Dioxide. B) Silicate. C) Silicate dioxide. D) Silicon. Show Answer Correct Answer: B) Silicate. 3. Potassium carbonate A) KCO$_{3}$. B) K(CO$_{3}$)$_{2}$. C) K$_{2}$CO$_{3}$. D) K$_{2}$(CO$_{3}$)$_{2}$. Show Answer Correct Answer: C) K$_{2}$CO$_{3}$. 4. In the compound CO2, how many Oxygen atoms share their electrons with 1 Carbon atom? A) 4. B) 3. C) 2. D) 1. Show Answer Correct Answer: C) 2. 5. Write the formula of the following compound.Magnesium hydroxide. A) Mg(OH)$_{3}$. B) Mg(OH)$_{2}$. C) Mg OH$_{2}$. D) None of the above. Show Answer Correct Answer: B) Mg(OH)$_{2}$. 6. Outer shell electrons are called A) Outer electrons. B) Valence electrons. C) Negatives. D) None of the above. Show Answer Correct Answer: B) Valence electrons. 7. Formulae of Ferrous Oxide A) FeOH. B) FeO. C) Fe2. D) FeCl2. Show Answer Correct Answer: B) FeO. 8. Atoms are electrically neutral when A) They have a minimal charge. B) They have a balanced number of protons and neutrons. C) They have a balanced number of protons and electrons. D) They have no valance electrons. Show Answer Correct Answer: C) They have a balanced number of protons and electrons. 9. Is water an element or a compound? A) Element. B) Compound. C) All the above. D) None of the above. Show Answer Correct Answer: B) Compound. 10. Name of the formula "Calcium Hydroxide" A) $ca\left(OH\right)_2$. B) $Ca\left(OH\right)_3$. C) $Ca\left(OH\right)_2$. D) $Ca\left(OH\right)_4$. Show Answer Correct Answer: C) $Ca\left(OH\right)_2$. 11. "Thousands of new mobile phones were produced by Samsung in 2018." The word in italic is: A) Effect. B) Theme. C) Recipient. D) Affected. Show Answer Correct Answer: A) Effect. 12. How many electrons do atoms need to be stable? A) 1. B) 2. C) 6. D) 8. Show Answer Correct Answer: D) 8. 13. The atom of atomic number 17 ( Chlorine ) find the number of valence electrons present in and it's valency is A) 7, -1. B) -1, 7. C) 4, 5. D) 7, 1. Show Answer Correct Answer: A) 7, -1. 14. Valency of Aluminium A) 3+. B) 3-. C) 2+. D) 2-. Show Answer Correct Answer: A) 3+. 15. How many electrons can the first energy level hold according to Bohr's model? A) 1. B) 6. C) 2. D) 4. Show Answer Correct Answer: C) 2. 16. What is the significance of valency in forming compounds? A) Valency is irrelevant in compound formation. B) Valency determines the temperature of compounds. C) Valency only affects the color of compounds. D) Valency is significant as it determines how atoms bond and combine to form stable compounds. Show Answer Correct Answer: D) Valency is significant as it determines how atoms bond and combine to form stable compounds. 17. Symbol of "Mercury" A) Me. B) Hg. C) My. D) Hg. Show Answer Correct Answer: B) Hg. 18. Which is the correct formula of Sodium Oxide? A) NaO. B) NaO$_{2}$. C) Na$_{2}$O$_{2}$. D) Na$_{2}$O. Show Answer Correct Answer: D) Na$_{2}$O. 19. Atoms of nonmetals tend to lose their valence electrons. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 20. What is the valency of Argon? A) 2. B) 0. C) 3. D) 4. Show Answer Correct Answer: B) 0. 21. Which elements has positive divalent elements A) Sulphur. B) Cobalt. C) Iodide. D) Sulphate. Show Answer Correct Answer: B) Cobalt. 22. The molecular formula for Ammonium carbonate is A) (NH$_{4 }$)$_{2}$CO$_{3}$. B) (NH$_{4}$ )CO$_{3}$. C) (NH$_{4}$ )$_{2}$CO. D) None of the above. Show Answer Correct Answer: A) (NH$_{4 }$)$_{2}$CO$_{3}$. 23. What is valency in chemistry? A) The weight of an element. B) The color of an element. C) Combining power of an element. D) The boiling point of an element. Show Answer Correct Answer: C) Combining power of an element. 24. Verbs can have different valency patterns depending on the context of the sentence. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. ← PreviousRelated 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