This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements – Quiz 31 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 31 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In solid state PCl$_{5}$ is a ..... A) Covalent solid. B) Octahedral structure. C) Ionic solid with [PCl$_{6}$]$^{+}$ octahedral and [PCl$_{4}$]$^{-}$ tetrahedra. D) Ionic solid with [PCl$_{4}$]$^{+}$ tetrahedral and [PCl$_{6}$]$^{-}$ octahedra. Show Answer Correct Answer: D) Ionic solid with [PCl$_{4}$]$^{+}$ tetrahedral and [PCl$_{6}$]$^{-}$ octahedra. 2. Colour of Cl2 is A) Reddish brown. B) Blue. C) Greenish yellow. D) Violet. Show Answer Correct Answer: C) Greenish yellow. 3. What is the common oxidation state of alkali metals? A) +2. B) 0. C) -1. D) +1. Show Answer Correct Answer: D) +1. 4. Which of the following is a tetrabasic acid? A) Pyrophosphoric acid. B) Orthophosphoric acid. C) Hyprophosphorous acid. D) Metaphosphoric acid. Show Answer Correct Answer: A) Pyrophosphoric acid. 5. Affinity for hydrogen decreases in the group from fluorine to iodine. Which of the halogen acid shows highest bond dissociation enthalpy A) HF. B) HCl. C) HBr. D) HI. Show Answer Correct Answer: A) HF. 6. Both Suphur and oxygen in SO2 undergo the following hybridization A) Sp. B) Sp2. C) Sp3. D) Sp3d. Show Answer Correct Answer: B) Sp2. 7. What is the primary characteristic of the hydration energy of alkali metal ions? A) Fluctuates randomly. B) Remains constant. C) Increases with ionic size. D) Decreases with ionic size. Show Answer Correct Answer: D) Decreases with ionic size. 8. XeF$_{4}$ on partial hydrolysis produces A) XeF$_{4}$. B) XeOF$_{2}$. C) XeOF$_{4}$. D) XeO$_{3}$. Show Answer Correct Answer: B) XeOF$_{2}$. 9. Which of the following is not a noble gas? A) Helium, He. B) Radon, Rn. C) Nickel, Ni. D) Xenon, Xe. Show Answer Correct Answer: C) Nickel, Ni. 10. The formation of O$_{2}$$^{+}$[PtF$_{6}$]$^{-}$is the basis for the formation of first xenon compound. This is because A) O2 and Xe have different sizes. B) Both O2 and Xe are gases. C) O2 and Xe have comparable electro-negativities. D) O2 and Xe have comparable ionisation enthalpies. Show Answer Correct Answer: D) O2 and Xe have comparable ionisation enthalpies. 11. Which of the following alkali metals forms a nitride when reacting with nitrogen? A) Lithium. B) Sodium. C) Rubidium. D) Potassium. Show Answer Correct Answer: A) Lithium. 12. What is used as a promoter in the manufacture of ammonia by Haber process? A) KO2, Al2O3. B) K2O, Al(OH)3. C) KO2, Al(OH)3. D) K2O, Al2O3. Show Answer Correct Answer: D) K2O, Al2O3. 13. Which of the following comparison is correct about helium, He and argon, Ar? A) The melting point of helium is higher than argon. B) Argon has more filled electron shells than helium. C) Helium have stable octet electron arrangement while argon have stable duplet electron arrangement. D) One mole of helium is heavier than one mole of argon. Show Answer Correct Answer: B) Argon has more filled electron shells than helium. 14. Among the following, which is the strongest oxidising agent? A) Cl $_{2}$. B) F $_{2}$. C) Br $_{ 2 }$. D) I $_{2}$. Show Answer Correct Answer: B) F $_{2}$. 15. CO+N2 is A) Producer gas. B) Water gas. C) Syn gas. D) Coal gas. Show Answer Correct Answer: A) Producer gas. 16. Correct statements among 'A' to 'D' regarding silicones are:(A) They are polymers with hydrophobic character.(B) They are biocompatible.(C) In general, they have high thermal stability and low dielectric strength.(D) Usually, they are resistant to oxidation and used as greases. A) A, B, C and D. B) A, B and C only. C) A and B only. D) A, B and D only. Show Answer Correct Answer: D) A, B and D only. 17. The geometry and hybridization of Xe in XeF$_{6 }$are respectively A) Distorted octahedral, sp$^{3}$d$^{3}$. B) Square planar, sp$^{3}$d$^{2}$. C) Pyramidal, sp$^{3}$. D) Octahedral, sp$^{3}$d$^{2}$. Show Answer Correct Answer: A) Distorted octahedral, sp$^{3}$d$^{3}$. 18. Chemical formula of orthoboric acid A) H3BO3. B) Na2B4O7.10H2O. C) Na2B4O7. D) B2H6. Show Answer Correct Answer: A) H3BO3. 19. H$_{2}$S is more acidic than H$_{2}$O because A) Atomic number of oxygen is higher than sulphur. B) Oxygen is more electronegative than sulphur. C) H-S bond dissociation energy is less as compared to H-O bond. D) H-O bond dissociation energy is less also compared to H-S bond. Show Answer Correct Answer: C) H-S bond dissociation energy is less as compared to H-O bond. 20. Which statement about noble gases is not correct? A) Xe forms XeF$_{6}$. B) Ar is used in electric bulbs. C) Kr is obtained during radioactive disintegration. D) He has the lowest b.pt among all the noble gases. Show Answer Correct Answer: C) Kr is obtained during radioactive disintegration. 21. Describe the trend in metallic character among p block elements. A) Metallic character decreases down a group and increases across a period. B) Metallic character increases down a group and decreases across a period among p block elements. C) Metallic character is highest in the middle of a period and lowest at the ends. D) Metallic character remains constant down a group and across a period. Show Answer Correct Answer: B) Metallic character increases down a group and decreases across a period among p block elements. 22. As we move down the group basicity of group 15 elements A) Increases. B) Decreases. C) Remain constant. D) None of the above. Show Answer Correct Answer: B) Decreases. 23. Which of the following factor is not responsible for the anamolous behaviour of the first member of each group in a p-block elements A) Small size. B) High ionisation enthalpy. C) Outer electronic configuration. D) Absence of d-orbitals. Show Answer Correct Answer: C) Outer electronic configuration. 24. Which of the following oxides of N is paramagnetic and neutral? A) NO. B) N$_{2}$O. C) N$_{2}$O$_{4}$. D) NO$_{2}$. Show Answer Correct Answer: A) NO. 25. Choose the correct statements from the following A) Rhombic sulphur is blue in colour. B) Rhombic sulphur is soluble in water but insoluble in organic solvents. C) Rhombic and monoclinic sulphur have S$_{6}$ molecules. D) In cyclo-S$_{6}$ molecule, the ring adopts chair form. Show Answer Correct Answer: D) In cyclo-S$_{6}$ molecule, the ring adopts chair form. ← 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