This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Chemistry Part Ii > Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 8 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. No. of lone pairs and type of hybridization in "S" in SO$_{3}$ molecule are respectively A) 0 and sp$^{2}$. B) 1 and sp$^{2}$. C) 0 and sp$^{3}$. D) 1 and sp$^{3}$. Show Answer Correct Answer: A) 0 and sp$^{2}$. 2. In p-block, non-metals are placed in A) Upper right part. B) Middle part. C) Lower left part. D) Bottom of the group. Show Answer Correct Answer: A) Upper right part. 3. The brown ring test for nitrates depends upon A) The reduction of nitrate to nitric oxide. B) Oxidising action of sulphuric acid. C) Oxidation of nitric oxide to nitrogen dioxide. D) Reduction of ferrous sulphate to iron. Show Answer Correct Answer: A) The reduction of nitrate to nitric oxide. 4. Which of the following is one of the rarest elements of group 18? A) Xenon. B) Neon. C) Krypton. D) Helium. Show Answer Correct Answer: A) Xenon. 5. Why is Sulphur dioxide considered as an air pollutant? A) It increases the temperature of the atmosphere. B) It is used as insecticide which causes air pollution. C) It causes acid rain due to formation of sulphuric acid on combining with O$_{2}$ and H$_{2}$O. D) It is a strong oxidizing agent hence oxidies the other components of air. Show Answer Correct Answer: C) It causes acid rain due to formation of sulphuric acid on combining with O$_{2}$ and H$_{2}$O. 6. Atomic number of polonium A) 84. B) 39. C) 54. D) 40. Show Answer Correct Answer: A) 84. 7. What is the trend in melting points for Group 14 elements? A) Melting points increase from carbon to lead. B) Melting points are constant across Group 14 elements. C) Melting points vary randomly without a trend. D) Melting points decrease from carbon to lead. Show Answer Correct Answer: A) Melting points increase from carbon to lead. 8. Which "Halogen" can able to replace Chlorine in Sodium Chloride? A) Astatine. B) Flourine. C) Iodine. D) Bromine. Show Answer Correct Answer: B) Flourine. 9. If chlorine is passed through a solution of Hydrogen sulphide in water, the solution turns turbid due to the formation of A) Nascent oxygen. B) Nascent hydrogen. C) Free chlorine. D) Free sulphur. Show Answer Correct Answer: D) Free sulphur. 10. In 13th group Tl$^{+1 }$ion is more stable than Tl$^{3+}$ ion due to A) Inert pair effect. B) High electronegatively. C) High ionisation energy. D) Stable electronic configuration. Show Answer Correct Answer: A) Inert pair effect. 11. Least reactive noble gas. A) Helium. B) Xenon. C) Krpton. D) Radon. Show Answer Correct Answer: A) Helium. 12. Most reactive elemental gas. A) Oxygen. B) Hydrogen. C) Fluorine. D) Chlorine. Show Answer Correct Answer: C) Fluorine. 13. Which statement is true about halogens? A) Form covalent compounds with other non-metallic elements. B) A less reactive halogen will displace a more reactive element form its ionic salt. C) Form ionic compound with hydrogen. D) Form negative ion of charge-2. Show Answer Correct Answer: A) Form covalent compounds with other non-metallic elements. 14. Which of the following pairs is used as promoter in the manufacture of NH3? A) FeO and Fe. B) KCl and AlCl3. C) K2O and Al2O3. D) KCl and FeCl3. Show Answer Correct Answer: C) K2O and Al2O3. 15. Which of the following is strongest proton accepter? A) PH3. B) H2S. C) NH3. D) H2O. Show Answer Correct Answer: C) NH3. 16. What is the most stable allotrope of sulfur, a Group 15 element? A) Amorphous sulfur. B) Monoclinic sulfur. C) Cubic sulfur. D) Rhombic sulfur. Show Answer Correct Answer: D) Rhombic sulfur. 17. Which of the following compounds is not formed by lithium? A) Lithium oxide. B) Lithium nitride. C) Lithium chloride. D) Lithium ethynide. Show Answer Correct Answer: D) Lithium ethynide. 18. Boron compounds behave as lewis acids because of their A) Ionisation energy. B) Ionisation energy. C) Covalent nature. D) Electron deficient nature. Show Answer Correct Answer: D) Electron deficient nature. 19. Which of the following is solid p-block element at room temperature? A) Bismuth. B) Oxygen. C) Nitrogen. D) Iodine. Show Answer Correct Answer: A) Bismuth. 20. Which of the following statements regarding ozone is not correct? A) The oxygen-oxygen bond length in ozone is identical with that of molecular oxygen. B) The ozone is resonance hybrid of two structures. C) The ozone molecule is angular in shape. D) Ozone is used as a germicide and disinfectant for the purification of air. Show Answer Correct Answer: A) The oxygen-oxygen bond length in ozone is identical with that of molecular oxygen. 21. Which of the following elements has the maximum covalency of 6? A) Nitrogen. B) Fluorine. C) Oxygen. D) Carbon. Show Answer Correct Answer: D) Carbon. 22. Electronegativity of oxygen is more than sulphur yet H2S isacidic while water is neutral. This is because A) Water is highly associated compound. B) Molecular mass of H2S is more than H2O. C) H2S is gas while H2O is a liquid. D) H-S bond is weaker than H-O bond. Show Answer Correct Answer: D) H-S bond is weaker than H-O bond. 23. Conc HNO3 is yellow in colour due to presence of A) NO2 dissolve in it. B) NO dissolve in it. C) N2O3 dissolve in it. D) N2O dissolve in it. Show Answer Correct Answer: A) NO2 dissolve in it. 24. Assertion:Bond angle of H$_{2 }$S is smaller than H$_{2}$O. Reason:Electronegativity of the central atom increases, bond angle decreases.(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) B. B) A. C) C. D) D. Show Answer Correct Answer: C) C. 25. According to VSEPR theory, the structure of IF7 is A) Pentagonal bipyramidal. B) Tetrahedral. C) Square pyramidal. D) Bent T shape. Show Answer Correct Answer: A) Pentagonal bipyramidal. 26. What is the nature of the oxides of carbon and silicon? A) Basic and neutral. B) Alkaline and acidic. C) Acidic and amphoteric. D) Neutral and amphoteric. Show Answer Correct Answer: C) Acidic and amphoteric. 27. Which of the following alkali metals forms a superoxide? A) Na. B) Li. C) Rb. D) K. Show Answer Correct Answer: D) K. 28. Identifying the incorrect statement about acidic oxides in the p-block: A) Aluminium oxide is an example of an amphoteric oxide. B) Carbon dioxide forms carbonic acid upon dissolution in water, showcasing its acidic oxide nature. C) Bismuth oxide is a typical basic oxide found in the p-block. D) None of the above. Show Answer Correct Answer: C) Bismuth oxide is a typical basic oxide found in the p-block. 29. Which property of Group 18 elements increases when going down the Group in the Periodic Table? A) Electrical conductivity. B) Reactivity. C) Solubility in water. D) Forces of attraction. Show Answer Correct Answer: D) Forces of attraction. 30. End-product of the complete hydrolysis of XeF$_{6}$ is A) XeF$_{2}$O$_{2}$. B) XeO$_{3}$$^{-}$. C) XeF$_{4}$O. D) XeO$_{3}$. Show Answer Correct Answer: D) XeO$_{3}$. 31. Which among the following is not a noble gas A) Neon. B) Argon. C) Krypton. D) Boron. Show Answer Correct Answer: D) Boron. 32. Which of the following is NOT an alkali metal? A) Magnesium. B) Sodium. C) Potassium. D) Lithium. Show Answer Correct Answer: A) Magnesium. 33. The term chalcogens is for group A) 15. B) 16. C) 17. D) 18. Show Answer Correct Answer: B) 16. 34. The shape of XeF$_{4}$ is A) Tetrahedral. B) Triangular pyramidal. C) Square planer. D) None of these. Show Answer Correct Answer: C) Square planer. 35. What is the trend in the boiling points of Group 13 elements? A) The boiling points of Group 13 elements fluctuate randomly, showing no clear trend. B) The boiling points of Group 13 elements increase down the group, with a notable decrease at gallium. C) The boiling points of Group 13 elements remain constant down the group, with no significant changes. D) The boiling points of Group 13 elements decrease down the group, with an increase at gallium. Show Answer Correct Answer: B) The boiling points of Group 13 elements increase down the group, with a notable decrease at gallium. 36. As we go down the group metallic character A) Become constant. B) Increases. C) Decreases. D) Become zero. Show Answer Correct Answer: C) Decreases. 37. Which of the following bonds has the highest energy A) S S. B) O O. C) Se-Se. D) Te Te. Show Answer Correct Answer: A) S S. 38. The catalyst used in contact process is A) Cu$_{2}$O. B) MnO$_{2}$. C) V$_{2}$O$_{5}$. D) Pt. Show Answer Correct Answer: C) V$_{2}$O$_{5}$. 39. Dry bleach is carried out by A) SO$_{2}$. B) Cl$_{2}$. C) O$_{3}$. D) O$_{2}$. Show Answer Correct Answer: C) O$_{3}$. 40. Na$_{2}$B$_{4}$O$_{7}$ + 6CaF$_{2}$ + 8H$_{2}$SO$_{4}$ A) 2NaHSO$_{4}$ + 5CaSO$_{4}$ + 2H$_{2}$O + 4BF$_{3}$. B) 2NaHSO$_{4}$ + 6CaSO$_{4}$ + 7H$_{2}$O + 4BF$_{3}$. C) 2NaHSO$_{4}$ + 6CaSO$_{4}$ + 2H$_{2}$O + 4BF$_{3}$. D) 2NaHSO$_{4}$ + 6CaSO$_{4}$ + 4H$_{2}$O + 4BF$_{3}$. Show Answer Correct Answer: B) 2NaHSO$_{4}$ + 6CaSO$_{4}$ + 7H$_{2}$O + 4BF$_{3}$. 41. Sulphur trioxide is not directly dissolved in water to form sulphuric acid because A) Sulphur trioxide is insoluble in water due to its covalent nature. B) It results in the formation of dense fog of sulphuric acid which is difficult to condense. C) SO$_{3}$ does not react with water to form acid. D) SO$_{3 }$gets oxidized to H$_{2}$SO$_{3}$ when dissolved in water. Show Answer Correct Answer: B) It results in the formation of dense fog of sulphuric acid which is difficult to condense. 42. All the noble gases except ..... occur in the atmosphere. A) Radon and helium. B) Neon and argon. C) Radon and Ognesson. D) Ognesson and krypton. Show Answer Correct Answer: C) Radon and Ognesson. 43. The type of bonds in N$_{2}$O$_{5 }$are A) Ionic. B) Covalent. C) Ionic and covalent. D) Covalent and coordinate. Show Answer Correct Answer: D) Covalent and coordinate. 44. What are the trends in boiling and melting points for group 15 elements? A) There is no trend in melting and boiling points for group 15 elements. B) Melting and boiling points increase down the group, with some exceptions. C) Melting points are higher than boiling points for all elements. D) Melting and boiling points decrease down the group. Show Answer Correct Answer: B) Melting and boiling points increase down the group, with some exceptions. 45. Bromine has the valence electronic configuration of 4s$^{2}$ 3d$^{10}$ 4p$^{5}$. Choose the correct position of Br element in Periodic Table. A) Group:15Period:4d-block. B) Group:17Period:4d-block. C) Group:17Period:4p-block. D) None of the above. Show Answer Correct Answer: C) Group:17Period:4p-block. 46. In group 15 elements as we move down the group ATOMIC SIZE A) DECREASES. B) INCREASES. C) All the above. D) None of the above. Show Answer Correct Answer: B) INCREASES. 47. What is the trend of acid-base nature with increasing atomic number of Period 3 oxides? A) Acidic, amphoteric, basic. B) Basic, amphoteric, acidic. C) Basic, acidic, amphoteric. D) Acidic, basic, amphoteric. Show Answer Correct Answer: B) Basic, amphoteric, acidic. 48. What is the element symbol of Gallium? A) Ge. B) Gm. C) Gn. D) Ga. Show Answer Correct Answer: D) Ga. 49. N combines with metals to form A) Nitrosyl chloride. B) Nitrates. C) Nitrites. D) Nitrides. Show Answer Correct Answer: D) Nitrides. 50. P-block elements are also known as A) Alkali and alkaline earth metals. B) Transition elements. C) Innertransition elements. D) Representative elements. Show Answer Correct Answer: D) Representative elements. 51. Which of the following is the lightest p-block element? A) Nitrogen. B) Carbon. C) Oxygen. D) Boron. Show Answer Correct Answer: D) Boron. 52. Which of the following is a noble gas that is heavier than air? A) Hydrogen. B) Argon. C) Sodium. D) Helium. Show Answer Correct Answer: B) Argon. 53. Ammonia is liquid but phosphene is a gas . Choose the most plausible reason A) Due to more molar mass ammonia has maximum vanderwall force of attraction. B) Due to more molar mass, ammonia has less vander wall force of attraction. C) Due to presence of inter molecular hydrogen bonding in ammonia. D) Due to absence of hydrogen bonding in ammonia. Show Answer Correct Answer: C) Due to presence of inter molecular hydrogen bonding in ammonia. 54. Which does not show inert pair effect? A) Al. B) In. C) Ga. D) Th. Show Answer Correct Answer: A) Al. 55. O$_{3}$ acts as a powerful oxidising agent because A) Ozone is thermodynamically unstable. B) Its decomposition into oxygen results in the liberation of heat. C) It liberates atoms of nascent oxygen (O3 $\rightarrow$ O2 + O). D) Ozone has a characteristic smell. Show Answer Correct Answer: C) It liberates atoms of nascent oxygen (O3 $\rightarrow$ O2 + O). 56. Hydrogen is placed in Group 1 because: A) It has one electron in its outer shell. B) It forms ionic compounds like alkali metals. C) It has properties of both metals and non-metals. D) All of the above. Show Answer Correct Answer: D) All of the above. 57. Which is used as dehydrating agent for dehydration of Ammonia? A) H2SO4. B) H3PO4. C) CaO. D) NONE OF THESE. Show Answer Correct Answer: C) CaO. 58. Nitric acid is prepared by A) Ostwald process. B) Haber process. C) Contact process. D) None of the above. Show Answer Correct Answer: A) Ostwald process. 59. Which P block element is essential for life? A) Arsenic. B) Boron. C) Phosphorus. D) Silicon. Show Answer Correct Answer: C) Phosphorus. 60. What is the molecular geometry of chlorate ion, ClO$_{3}$$^{-}$ A) Bent. B) Disphenoidal. C) Trigonal planar. D) Trigonal pyramidal. Show Answer Correct Answer: D) Trigonal pyramidal. ← PreviousNext →Related QuizzesScience QuizzesClass 12 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books