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 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 5 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Fill in the blanks The high reactivity of fluorine is due to its ..... dissociation energy . its shows only ..... oxidation state. It has ..... electron affinity than Cl. Among all hydrogen halides boiling points is highest for ..... A) Low, -1, lower, HF. B) Low, +1, lower, HCl. C) High, -1, higher, HF. D) High, +1, higher, HF. Show Answer Correct Answer: A) Low, -1, lower, HF. 2. P$_{4}$O$_{6 }$ reacts with cold water to form ..... A) HPO$_{4}$. B) H$_{4}$PO$_{4}$. C) H$_{3}$PO$_{3}$. D) H$_{3}$PO$_{4}$. Show Answer Correct Answer: C) H$_{3}$PO$_{3}$. 3. The shape of ClF$_{3}$ is A) Tetrahedral. B) T shaped. C) Pentagonal bipyramidal. D) Trigonal planar. Show Answer Correct Answer: B) T shaped. 4. Sulphur is completely oxidised by conc. HNO3 A) H$_{2}$S$_{2}$O$_{8}$. B) H$_{2}$SO$_{3}$. C) H$_{2}$SO$_{4}$. D) SO$_{2}$. Show Answer Correct Answer: C) H$_{2}$SO$_{4}$. 5. The correct order of bond angles (smallest first) in H2S, NH3, BF3, SiH4 is A) NH3 < H2S < SiH4 < BF3. B) H2S < SiH4 < NH3 < BF3. C) H2S < NH3 < BF3 < SiH4. D) H2S < NH3 < SiH4 < BF3. Show Answer Correct Answer: D) H2S < NH3 < SiH4 < BF3. 6. 2Na$_{2}$S$_{2}$O$_{3}$ + I2 A) NaS$_{4}$O$_{6}$ + 3NaI. B) Na$_{4}$S$_{4}$O$_{6}$ + 2NaI. C) Na$_{2}$S$_{4}$O$_{6}$ + 2NaI. D) Na$_{2}$S$_{4}$O$_{6}$ + Na$_{2}$I$_{2}$. Show Answer Correct Answer: C) Na$_{2}$S$_{4}$O$_{6}$ + 2NaI. 7. When white phosphorus is heated at 473K under high pressure, what will happen? A) Red phosphorus is formed. B) $\beta$-block phosphorus is formed. C) $\alpha$-block phosphorus is formed. D) No change would be observed. Show Answer Correct Answer: B) $\beta$-block phosphorus is formed. 8. The main ore of aluminum is: A) Galena. B) Malachite. C) Hematite. D) Bauxite. Show Answer Correct Answer: D) Bauxite. 9. N can form only one chloride with Cl which is NCl$_{3}$ whereas P can form PCl$_{3}$ and PCl$_{5}$. This is A) Due to higher to reactivity of P towards Cl than N. B) Due to difference in size of N & P. C) Due to presence of multiple bonding in nitrogen. D) Due to absence of d-orbitals in nitrogen. Show Answer Correct Answer: D) Due to absence of d-orbitals in nitrogen. 10. A translucent white waxy solid (A) reacts with excess of Cl to give a yellowish white powder(B). (B) reacts with organic compounds containing-OH group and converts them into chloro derivatives. (B) on hydrolysis give(C) and is finally converted to phosphoric acid. (A), (B) & (C) are A) P$_{4}$, PCl$_{3}$, H$_{3}$PO$_{4}$. B) P$_{4}$, PCl$_{5}$, H$_{3}$PO$_{3}$. C) P$_{4}$, PCl$_{5}$, POCl$_{3}$. D) P$_{4}$, PCl$_{3}$, POCl$_{3}$. Show Answer Correct Answer: C) P$_{4}$, PCl$_{5}$, POCl$_{3}$. 11. What is the value of 2nd Electron affinity for oxygen in kJ/mole A) -780. B) +141. C) -141. D) +780. Show Answer Correct Answer: D) +780. 12. The shape of I F $_{ 7}$ A) T shape. B) Pentagonal bipyramidal. C) Linear. D) Trigonal bipyramidal. Show Answer Correct Answer: B) Pentagonal bipyramidal. 13. 2MnO$_{2 }$+ 2H$_{2}$SO$_{4}$ A) 2MnSO$_{4}$ +H$_{2}$O + 2O$_{2}$. B) 2MnSO$_{4}$ +3H$_{2}$O + O$_{2}$. C) MnSO$_{4}$ +2H$_{2}$O + O$_{2}$. D) 2MnSO$_{4}$ +2H$_{2}$O + O$_{2}$. Show Answer Correct Answer: D) 2MnSO$_{4}$ +2H$_{2}$O + O$_{2}$. 14. Marshall's acid is A) H$_{2}$S$_{2}$O$_{7}$. B) H$_{2}$SO$_{3}$. C) H$_{2}$S$_{2}$O. D) H$_{2}$S$_{2}$O$_{5}$. Show Answer Correct Answer: C) H$_{2}$S$_{2}$O. 15. The elements N, O, F readily forms hydrogen bonds due to their high A) Ionisation energy. B) Electron affinity. C) Electro negativity. D) Atomic radius. Show Answer Correct Answer: C) Electro negativity. 16. Emerald, Ruby, Sapphire and Topaz are ..... ore of aluminium. A) Corundum. B) Kaolin. C) Diaspore. D) Bauxite. Show Answer Correct Answer: A) Corundum. 17. ELECTRONIC CONFIGURATION is2, 2s2, 2px1, 2py1, 2pz1 represents which of the following elements? A) Fluorine. B) Oxygen. C) Aluminium. D) Nitrogen. Show Answer Correct Answer: D) Nitrogen. 18. Ammonia is a Lewis base and act as complexing agent because A) It accepts electron pair. B) It is neither electron pair donar or acceptor. C) It act as electron pair donar. D) It exhibit covalency more than five. Show Answer Correct Answer: C) It act as electron pair donar. 19. LiAlH$_{4}$ + SiCl$_{4}$ A) SiH$_{4}$ +AlCl$_{3}$ + LiCl. B) SiH$_{4}$ +AlCl$_{3}$ + 2LiCl. C) SiH$_{2}$ +AlCl$_{3}$ + LiCl. D) SiH$_{2}$ +AlCl$_{3}$ + 2LiCl. Show Answer Correct Answer: A) SiH$_{4}$ +AlCl$_{3}$ + LiCl. 20. The deep blue colour produced on adding excess ofammonia to copper sulphate is due to presence of A) [Cu(NH3)4]2+. B) Cu2+. C) [Cu(NH3)6]2+. D) [Cu(NH3)2]2+. Show Answer Correct Answer: A) [Cu(NH3)4]2+. 21. Which of the following is correct representation of reaction of acidified permanganate solution with sulphur dioxide? A) 3MnO$^{-}$$_{4}$+2SO$_{2}$+2H$_{2}$O$\rightarrow$2S+3Mn$^{2+}$+4H$^{+}$. B) 2MnO$^{-}$$_{4}$+5SO$_{2}$+2H$_{2}$O$\rightarrow$5SO$^{2-}$$_{4}$+2Mn$^{2+}$+4H$^{+}$. C) 2MnO$^{-}$$_{4}$+5SO$_{2}$+2H$_{2}$O$\rightarrow$4SO$^{2-}$$_{3}$+2Mn$^{2+}$+4H$^{+}$. D) MnO$^{-}$$_{4}$+SO$_{2}$+2H$_{2}$O$\rightarrow$S+Mn$^{2+}$+4H$^{+}$. Show Answer Correct Answer: B) 2MnO$^{-}$$_{4}$+5SO$_{2}$+2H$_{2}$O$\rightarrow$5SO$^{2-}$$_{4}$+2Mn$^{2+}$+4H$^{+}$. 22. Which compound has planar structure? A) XeOF$_{2}$. B) XeO$_{2}$F$_{2}$. C) XeF$_{4}$. D) XeO$_{4}$. Show Answer Correct Answer: C) XeF$_{4}$. 23. Maximum covalency of nitrogen is ..... A) 5. B) 6. C) 3. D) 4. Show Answer Correct Answer: D) 4. 24. Correct order of boiling point is A) H$_{2}$O < H$_{2}$S < H$_{2}$Se < H$_{2}$Te. B) H$_{2}$S < H$_{2}$Se < H$_{2}$Te < H$_{2}$O. C) H$_{2}$Te < H$_{2}$O < H$_{2}$S < H$_{2}$Se. D) H$_{2}$O < H$_{2}$Se < H$_{2}$Te < H$_{2}$S. Show Answer Correct Answer: B) H$_{2}$S < H$_{2}$Se < H$_{2}$Te < H$_{2}$O. 25. It is the strongest oxidising agent and most reactive element among the halogens. A) I. B) F. C) Cl. D) Br. Show Answer Correct Answer: B) F. 26. Which of the following statement is not correct for nitrogen? A) Its electronegativity is very high. B) D-orbitals are available for bonding. C) It is a typical non-metal. D) Its molecular size is small. Show Answer Correct Answer: B) D-orbitals are available for bonding. 27. Chlorine is used as a ..... A) Bleaching agent. B) Extraction of gold and platinum. C) Tear gas. D) All of these. Show Answer Correct Answer: D) All of these. 28. Why is Helium used in divers' tank but not hydrogen gas? A) Helium is inert to any chemical reactions. B) Helium is lighter than hydrogen. C) Helium is cheaper. D) Helium is easy to get from market. Show Answer Correct Answer: A) Helium is inert to any chemical reactions. 29. The chemical form of Borax is A) Sodium carbonate. B) Sodium tetra borate. C) Sodium tetraborate decahydrate. D) None of the above. Show Answer Correct Answer: C) Sodium tetraborate decahydrate. 30. Which of the following is in an ionic compound A) PF$_{3}$. B) NF$_{3 }$. C) NCl$_{3}$. D) BiF$_{3 }$. Show Answer Correct Answer: D) BiF$_{3 }$. 31. In which of the following, sulphur is present in +5 oxidation state? A) Dithionic acid. B) Disulphuric acid. C) Sulphurous acid. D) Sulphuric acid. Show Answer Correct Answer: A) Dithionic acid. 32. The element showing maximum catenation property is A) Se. B) S. C) Te. D) O. Show Answer Correct Answer: B) S. 33. Shaan is conducting an experiment to determine which of the following is the lightest p-block element. A) Oxygen. B) Boron. C) Xenon. D) Indium. Show Answer Correct Answer: B) Boron. 34. P-block elements are those elements in which last electron enters in A) P ortibal. B) S orbital. C) D orbital. D) None of the above. Show Answer Correct Answer: A) P ortibal. 35. Which has highest boiling agent A) AsH3. B) BiH3. C) NH3. D) PH3. Show Answer Correct Answer: B) BiH3. 36. 2HClO$_{2 }$+ I$_{2 }$ A) 2HIO$_{3}$ + Cl$_{2}$. B) 2HIO$_{3}$ + 2Cl$_{2}$. C) HIO$_{3}$ + Cl$_{2}$. D) HIO$_{3}$ + 2Cl$_{2}$. Show Answer Correct Answer: A) 2HIO$_{3}$ + Cl$_{2}$. 37. Interhalogen compounds are more reactive than the individual halogens because A) They are prepared by direct combination of halogens. B) X-X' bond is weaker than X-X or X'-X' bonds. C) They are thermally more stable than halogens. D) There is a large difference in their electronegativity. Show Answer Correct Answer: B) X-X' bond is weaker than X-X or X'-X' bonds. 38. The name of monatomic negative ions (anions) all end in what suffix? A) -ate. B) -ate. C) -ide. D) -ine. Show Answer Correct Answer: C) -ide. 39. Which of the following is not amphoteric A) CO2. B) GeO2. C) SnO2. D) PbO2. Show Answer Correct Answer: A) CO2. 40. What contributes to the stability of nitrogen in its molecular form? A) Low electronegativity. B) Presence of a triple bond. C) Large atomic radius. D) High ionization energy. Show Answer Correct Answer: B) Presence of a triple bond. 41. Which of the following statements is incorrect about noble gases? A) They are monoatomic. B) They are colourless. C) They are odourless. D) They all have an outer electronic configuration of ns2np6. Show Answer Correct Answer: D) They all have an outer electronic configuration of ns2np6. 42. The important property shown by p-block elements is A) Complex formation. B) Coloured ion formation. C) Metallic character. D) Inert pair effect. Show Answer Correct Answer: D) Inert pair effect. 43. Chemical formula of ChileSaltpetre A) CaF2. B) KNO3. C) Ca9(PO4)6. D) NaNO3. Show Answer Correct Answer: D) NaNO3. 44. What is NOT true about Hydrogen Halides A) HI is the strongest acid. B) PK$_{a}$ value of HI is less than that of HCl. C) HF has the highest boiling point. D) HF is stronger acid than HCl. Show Answer Correct Answer: D) HF is stronger acid than HCl. 45. 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. 46. Shape of AX3 type molecules is A) Tetrahedral. B) Trigonal bipyramidal. C) Hexagonal. D) T-shaped. Show Answer Correct Answer: D) T-shaped. 47. Ammonia is used in detection of Cu$^{2+}$ ion because A) Aqueous solution of NH$_{3}$ reacts with Cu$^{2+}$ ion to form deep blue colored complex. B) Aqueous solution of NH$_{3}$ react with Cu$^{2+}$ ion to form white coloured complex. C) NH$_{3}$ reacts with Cu$^{2+}$ ion to give blue precipitate of CuO. D) NH$_{3}$ reacts with Cu$^{2+}$ ion to give green precipitate. Show Answer Correct Answer: A) Aqueous solution of NH$_{3}$ reacts with Cu$^{2+}$ ion to form deep blue colored complex. 48. 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. 49. What is the element symbol of Thallium? A) Tl. B) Th. C) Te. D) Tr. Show Answer Correct Answer: A) Tl. 50. In XeF$_{2}$, XeF$_{4}$, XeF$_{6}$ the number of lone pairs on Xe are respectively A) 3, 2, 1. B) 4, 1, 2. C) 2, 3, 1. D) 1, 2, 3. Show Answer Correct Answer: A) 3, 2, 1. 51. 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) C. B) D. C) B. D) A. Show Answer Correct Answer: C) B. 52. Which metal is extracted using the electrolytic process? A) Copper. B) Iron. C) Mercury. D) Sodium. Show Answer Correct Answer: D) Sodium. 53. Example for electron deficient ( 3c, 2e) compound A) Benzene. B) Diborane. C) Borazole. D) All. Show Answer Correct Answer: B) Diborane. 54. In XeF$_{2}$, XeF$_{4 }$& XeF$_{6}$ the no. of lone pairs on Xe is respectively A) 4, 1, 2. B) 1, 2, 3. C) 3, 2, 1. D) 2, 3, 1. Show Answer Correct Answer: C) 3, 2, 1. 55. The number of electrons found in the last energy level- A) Periods. B) Group electrons. C) Neutrons. D) Valence electrons. Show Answer Correct Answer: D) Valence electrons. 56. Choose the correct formula for phosphorus trioxide. A) P$_{4}$O$_{6}$. B) P$_{2}$O$_{3}$. C) P3O$_{6}$. D) P$_{4}$O$_{10}$. Show Answer Correct Answer: A) P$_{4}$O$_{6}$. 57. How many valence electrons does group 16 elements have? A) 18. B) 10. C) 16. D) 6. Show Answer Correct Answer: D) 6. 58. How does the acidity of oxides change across the p block? A) The acidity of oxides increases across the p-block from left to right. B) The acidity of oxides remains constant across the p-block. C) The acidity of oxides decreases across the p-block from left to right. D) The acidity of oxides is highest at the leftmost side of the p-block. Show Answer Correct Answer: A) The acidity of oxides increases across the p-block from left to right. 59. 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. 60. 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. ← 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 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books