This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 13 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is NOT true about Hydrogen Halides A) HF has the highest boiling point. B) HI is the strongest acid. C) HF is stronger acid than HCl. D) PK$_{a}$ value of HI is less than that of HCl. Show Answer Correct Answer: C) HF is stronger acid than HCl. 2. Which is the correct arrangement of the compounds based on their bond strengths? A) HF>HCl>HBr>HI. B) HI> HBr> HCl> HF. C) HCl> HF> HBr> H. D) HF> HBr> HCl> HI. Show Answer Correct Answer: A) HF>HCl>HBr>HI. 3. The elements of group 15 are collectively referred to as A) Pnicagens. B) Pnicopens. C) Nicopen. D) None of these. Show Answer Correct Answer: A) Pnicagens. 4. Shape of AX3 type molecules is A) Trigonal bipyramidal. B) Tetrahedral. C) T-shaped. D) Hexagonal. Show Answer Correct Answer: C) T-shaped. 5. Ammonia is used in detection of Cu$^{2+}$ ion because A) Aqueous solution of NH$_{3}$ react with Cu$^{2+}$ ion to form white coloured complex. B) Aqueous solution of NH$_{3}$ reacts with Cu$^{2+}$ ion to form deep blue colored complex. C) NH$_{3}$ reacts with Cu$^{2+}$ ion to give green precipitate. D) NH$_{3}$ reacts with Cu$^{2+}$ ion to give blue precipitate of CuO. Show Answer Correct Answer: B) Aqueous solution of NH$_{3}$ reacts with Cu$^{2+}$ ion to form deep blue colored complex. 6. Which statement regarding the classification of p-block elements is incorrect? A) Boron and germanium are classified as metalloids due to their intermediate electrical conductivity. B) Lead and bismuth are considered metals within the p-block, known for their ductility and metallic luster. C) Nitrogen and oxygen are p-block metals that exhibit high electrical conductivity and metallic bonding. D) None of the above. Show Answer Correct Answer: C) Nitrogen and oxygen are p-block metals that exhibit high electrical conductivity and metallic bonding. 7. What is the element symbol of Thallium? A) Th. B) Te. C) Tr. D) Tl. Show Answer Correct Answer: D) Tl. 8. In XeF$_{2}$, XeF$_{4}$, XeF$_{6}$ the number of lone pairs on Xe are respectively A) 2, 3, 1. B) 1, 2, 3. C) 4, 1, 2. D) 3, 2, 1. Show Answer Correct Answer: D) 3, 2, 1. 9. Coke and flux are used in smelting. Reason:The phenomenon in which ore is mixed with suitable flux and coke is heated to fusion is known as smelting.(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion. (b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion (c) Assertion is correct, reason is incorrect (d) Assertion is incorrect, reason is correct. A) A. B) B. C) C. D) D. Show Answer Correct Answer: B) B. 10. Which metal is extracted using the electrolytic process? A) Sodium. B) Iron. C) Mercury. D) Copper. Show Answer Correct Answer: A) Sodium. 11. Example for electron deficient ( 3c, 2e) compound A) Benzene. B) Diborane. C) Borazole. D) All. Show Answer Correct Answer: B) Diborane. 12. In XeF$_{2}$, XeF$_{4 }$& XeF$_{6}$ the no. of lone pairs on Xe is respectively A) 2, 3, 1. B) 1, 2, 3. C) 4, 1, 2. D) 3, 2, 1. Show Answer Correct Answer: D) 3, 2, 1. 13. The number of electrons found in the last energy level- A) Valence electrons. B) Group electrons. C) Periods. D) Neutrons. Show Answer Correct Answer: A) Valence electrons. 14. Choose the correct formula for phosphorus trioxide. A) P$_{2}$O$_{3}$. B) P$_{4}$O$_{10}$. C) P$_{4}$O$_{6}$. D) P3O$_{6}$. Show Answer Correct Answer: C) P$_{4}$O$_{6}$. 15. How many valence electrons does group 16 elements have? A) 18. B) 16. C) 10. D) 6. Show Answer Correct Answer: D) 6. 16. How does the acidity of oxides change across the p block? A) The acidity of oxides is highest at the leftmost side of the p-block. B) The acidity of oxides decreases across the p-block from left to right. C) The acidity of oxides increases across the p-block from left to right. D) The acidity of oxides remains constant across the p-block. Show Answer Correct Answer: C) The acidity of oxides increases across the p-block from left to right. 17. The Oxidation states of central sulphur atom and terminal sulphur atom in Thiosulphuric acid are respectively A) +4 and +2. B) +6 and +2. C) +5 and-2. D) +6 and-2. Show Answer Correct Answer: D) +6 and-2. 18. Ozone is used to bleach flour/starch and prefered over SO2 and Cl2, because A) Ozone can bleach flour only. B) Ozone is a dry bleaching agent. C) Ozone is non poisonous. D) None of these. Show Answer Correct Answer: B) Ozone is a dry bleaching agent. 19. Relationship between bond length and bond energy is A) Direct proportion. B) Indirect proportion. C) Depends on the compound. D) No relation. Show Answer Correct Answer: B) Indirect proportion. 20. Covalency of oxygen cannot exceed 2 unlike sulphuur which can show +4 or +6 because A) O atom does not have d-orbitals. B) O atom has two unpaired electrons in its valence shell. C) O can form a double bond with another O atom. D) Electrons of O atom cannot be promoted to d-orbitals due to small size. Show Answer Correct Answer: A) O atom does not have d-orbitals. 21. Which of the following is the strongest oxidizing agent A) Fluorine. B) Chlorine. C) Bromine. D) Iodine. Show Answer Correct Answer: A) Fluorine. 22. D-block elements loses first elecrton(s) from ..... subshell. A) 3p. B) 3s. C) 3d. D) 4s. Show Answer Correct Answer: D) 4s. 23. When chlorine reacts with cold and dilute solution of sodium hydroxide, it forms A) Cl-and ClO2-. B) Cl-and ClO-. C) Cl-and ClO3-. D) Cl-and ClO4-. Show Answer Correct Answer: B) Cl-and ClO-. 24. What is the name of the following ion?O$_{2}$ $^{2-}$ A) Oxide ion. B) Peroxide ion. C) Oxyate ion. D) Oxygen ion. Show Answer Correct Answer: B) Peroxide ion. 25. What is the hybridization of B & N in Borazine A) Sp. B) Sp2. C) Sp3. D) Dsp2. Show Answer Correct Answer: B) Sp2. ← PreviousNext →Related QuizzesClass 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 1Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 2Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 3Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 4Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 5Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 6Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 7Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 8Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 9Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books