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 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 4 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which one is having peroxo bond? A) H2SO3. B) H2SO4. C) H2S2o7. D) H2S2O8. Show Answer Correct Answer: D) H2S2O8. 2. How do the properties of p-block elements differ from s-block elements? A) P-block elements differ from s-block elements in electronegativity, bonding types, oxidation states, and the variety of element types present. B) P-block elements have lower ionization energies than s-block elements. C) S-block elements are more diverse in oxidation states than p-block elements. D) P-block elements primarily form ionic bonds unlike s-block elements. Show Answer Correct Answer: A) P-block elements differ from s-block elements in electronegativity, bonding types, oxidation states, and the variety of element types present. 3. The pseudohalogens-because their properties are similar to A) Representative elements. B) Halogens. C) Noblegases. D) Chalcogens. Show Answer Correct Answer: B) Halogens. 4. Hydrolysis reactions of Xenon fluorides are redox reactions A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 5. Cross-linked silicones are formed by the polymerization of A) RSi(OH)$_{3}$. B) R$_{2}$Si(OH)$_{2}$. C) R$_{3}$Si(OH). D) Si(OH)$_{4}$. Show Answer Correct Answer: A) RSi(OH)$_{3}$. 6. Which of these elements has the greater melting point? A) Magnesium. B) Phosphorus. C) Aluminium. D) Silicon. Show Answer Correct Answer: D) Silicon. 7. Diborane contains A) 4 bridge bonds. B) 5 bridge bonds. C) 2 bridge bonds. D) 6 bridge bonds. Show Answer Correct Answer: C) 2 bridge bonds. 8. On addition of conc. H2SO4 to a chloride salt, colourless fumes are evolvedbut in case of iodide salt, violet fumes come out. This is because A) HI is of violet colour. B) H2SO4 reduces HI to I2. C) HI changes to HIO3. D) HI gets oxidised to I2. Show Answer Correct Answer: D) HI gets oxidised to I2. 9. How is the appearance of bromine? A) Purple solid. B) Green gas. C) Brown liquid. D) Yellow gas. Show Answer Correct Answer: C) Brown liquid. 10. Which of the following is liquid p-block element at room temperature? A) Argon. B) Mercury. C) Bromine. D) Chlorine. Show Answer Correct Answer: C) Bromine. 11. Nitrogen is chemically inert. Why? A) Due to presence of double bond require more energy to break. B) Due to presence of triple bond require more energy to break. C) Triple bond requires less energy to break. D) None of the above. Show Answer Correct Answer: B) Due to presence of triple bond require more energy to break. 12. Acidity of diprotic acid in aqueous solution increases in the order. A) H2S < H2Se < H2Te. B) H2Se < H2Te < H2S. C) H2Se < H2S < H2Te. D) ) H2Te < H2S < H2Se. Show Answer Correct Answer: A) H2S < H2Se < H2Te. 13. Presence of ozone can be detected by A) FeS. B) CuS. C) PbS. D) None of these. Show Answer Correct Answer: C) PbS. 14. Example for pentagonalbipyramidal molecule A) ICl. B) IF7. C) ICl3. D) IF5. Show Answer Correct Answer: B) IF7. 15. Assertion:N$_{2}$ is less reactive than P$_{4}$ . Reason:Nitrogen has more electron gain enthalpy than phosphorus.(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) C. C) B. D) D. Show Answer Correct Answer: B) C. 16. The most stable trihalide of nitrogen is A) NI$_{3}$. B) NBr$_{3}$. C) NF$_{3}$. D) NCl$_{3}$. Show Answer Correct Answer: C) NF$_{3}$. 17. What are the three most significant oxidation state of phosphorous A) -3, +3, and +5. B) -3, +3, and-5. C) -3, +3, and +2. D) -3, +3, and +4. Show Answer Correct Answer: A) -3, +3, and +5. 18. Silicones are how many types A) 6. B) 4. C) 3. D) 2. Show Answer Correct Answer: C) 3. 19. Which one is a property of ozone? A) It act as an oxidizing agent in dry state. B) It oxidises PbS to PbSO$_{4}$. C) It oxidises Hg to Hg$_{2}$O. D) All of these. Show Answer Correct Answer: D) All of these. 20. Dry SO$_{2}$ does not dry flowers because A) Nascent hydrogen responsible for bleaching is produced only in presence of moisture. B) Water is the actual reducing agent responsible for bleaching. C) The OH$^{-}$ ions produced by water cause bleaching. D) Water is stronger than acid SO$_{2}$. Show Answer Correct Answer: A) Nascent hydrogen responsible for bleaching is produced only in presence of moisture. 21. SO$_{2}$ + MnO$_{4}$$^{-}$ + H$_{2}$O $\rightarrow$? A) SO$_{3}$$^{2-}$ + Mn$^{2+}$ + H$^{+}$. B) SO$_{3}$ + Mn$^{2+}$ + H$^{+}$. C) SO$_{4}$$^{2-}$ + MnO$_{2}$ + H$^{+}$. D) SO$_{4}$$^{2-}$ + Mn$^{2+}$ + H$^{+}$. Show Answer Correct Answer: D) SO$_{4}$$^{2-}$ + Mn$^{2+}$ + H$^{+}$. 22. Strong reducing behaviour of H$_{3}$PO$_{2}$ is due to A) Low oxidation state of phosphorus. B) Presence of two-OH groups and one P-H bond. C) Presence of one-OH group and two P-H bonds. D) High electron gain enthalpy of phosphorus. Show Answer Correct Answer: C) Presence of one-OH group and two P-H bonds. 23. Nitrogen forms N2, but phosphorus does not form P2, however, it converts P4, reason is A) P $\pi$ $\pi$. B) Multiple bonds form easily. C) Triple bond present between phosphorus atom. D) P $\pi$ $\pi$. Show Answer Correct Answer: A) P $\pi$ $\pi$. 24. Fill in the blanks by choosing the appropriate option. The noble gases can form compounds with (i) and (ii) the mixture of (iii) & (iv) is used for respiration by divers. A) Fluorine oxygen helium oxygen. B) Helium oxygen xenon argon. C) Iodine oxygen oxygen argon. D) Xenon platinum argon krypton. Show Answer Correct Answer: A) Fluorine oxygen helium oxygen. 25. For qualitative analysis of nitrates ions which test is used A) Luccas test. B) Brown ring test. C) Azo dye test. D) None of the above. Show Answer Correct Answer: B) Brown ring test. 26. Silicones or mixed with Paints and enamels to make them resistance towards A) High temperature. B) Sunlight. C) Chemicals. D) All the above. Show Answer Correct Answer: D) All the above. 27. Which is not isoelectronic species A) N3-, Ne, Mg2+. B) Cl-, P3-, Ar. C) B3+, He, Li+. D) N3-, S2-, Cl-. Show Answer Correct Answer: D) N3-, S2-, Cl-. 28. Name of the synthetic radioactive element of group 16 having atomic no.116 is A) Livermorium. B) Moscovium. C) Tennessine. D) Livernorium. Show Answer Correct Answer: A) Livermorium. 29. How does phosphorus contribute to crop yield in agriculture? A) By promoting root development. B) By enhancing pest resistance. C) By increasing water retention. D) By improving soil drainage. Show Answer Correct Answer: A) By promoting root development. 30. During a science class, Ria asked her classmates which of the following element is metalloid. A) Arsenic. B) Neon. C) Phosphorous. D) Fluorine. Show Answer Correct Answer: A) Arsenic. 31. In halogen family which element has more electron affinity A) Chlorine. B) Bromine. C) Iodine. D) Fluorine. Show Answer Correct Answer: A) Chlorine. 32. Which of the following is strongest acid among all? A) HBr. B) HCl. C) HI. D) HF. Show Answer Correct Answer: C) HI. 33. The correct order of acidic strength of hydrogen halides are A) HI B) HF C) HI D) HF Show Answer Correct Answer: B) HF 34. Glows red/orange when electricity is passed through it. A) Oxgyen. B) Neon. C) Helium. D) Argon. Show Answer Correct Answer: B) Neon. 35. The most commonly used reducing agent is A) PbCl2. B) SnCl4. C) AlCl3. D) SnCl2. Show Answer Correct Answer: D) SnCl2. 36. The molecular shape of SF$_{4 }$is A) Bent 'T' shape. B) Square planar. C) Tetrahedral. D) See-saw. Show Answer Correct Answer: D) See-saw. 37. General electron configuration of p-block elements A) Ns2np5. B) Ns2np6. C) Ns1np6. D) Ns1np5. Show Answer Correct Answer: C) Ns1np6. 38. ..... provides inert atmosphere for high temperature Metallurgical process. A) Xenon. B) Argon. C) Radon. D) Helium. Show Answer Correct Answer: B) Argon. 39. Which of the following pairs is not correctly matched? A) Allotropic form of S which is more stable at room temperature-Rhombic. B) The hydride of group 16 which is liquid at room temperature-water. C) The gas formed in the upper layers of atmosphere by action of UV radiations. D) The catalyst use in the manufacture of H$_{2}$SO$_{4}$ by contact process-Vandium pentoxide. Show Answer Correct Answer: C) The gas formed in the upper layers of atmosphere by action of UV radiations. 40. The hybridizations of Boron and Nitrogen in Borazine are respectively A) Sp$^{2}$ and sp$^{3}$. B) Sp$^{2}$ and sp$^{2}$. C) Sp$^{3}$ and sp$^{3}$. D) Sp$^{3}$ and sp$^{2}$. Show Answer Correct Answer: B) Sp$^{2}$ and sp$^{2}$. 41. The following properties are the properties of Magnesium and its oxides except A) Magnesium reacts with cold water to produce magnesium hydroxide and hydrogen gas. B) Magnesium oxide is a basic oxide. C) Magnesium oxide used as refractory lining of for furnace. D) Magnesium can conduct electricity. Show Answer Correct Answer: A) Magnesium reacts with cold water to produce magnesium hydroxide and hydrogen gas. 42. Which of the following is true for sulphate ion A) Number of lone pairs is 9. B) Hybridization on S atom is sp3d. C) Covalency of S is 4. D) Tetrahedral ion. Show Answer Correct Answer: D) Tetrahedral ion. 43. Which is a metalloid A) Si. B) Sn. C) C. D) Ge. Show Answer Correct Answer: D) Ge. 44. Group-16 elements in increasing order of atomic numbers are ..... A) Oxygen, sulphur, selenium, polonium, tellurium. B) Oxygen, selenium, sulphur, , tellurium, polonium. C) Oxygen, sulphur, selenium, tellurium, polonium. D) Oxygen, selenium, tellurium, polonium, sulphur. Show Answer Correct Answer: C) Oxygen, sulphur, selenium, tellurium, polonium. 45. What is the common use of silicon from Group 14? A) Silicon is primarily used in semiconductors and solar cells. B) Silicon is primarily utilized in food packaging materials. C) Silicon is mainly used in glass production. D) Silicon is often found in fertilizers and pesticides. Show Answer Correct Answer: A) Silicon is primarily used in semiconductors and solar cells. 46. When copper is heated with conc. HNO$_{3}$ it produces A) Cu(NO$_{3}$)$_{2}$, NO and NO$_{2}$. B) Cu(NO$_{3}$)$_{2}$, H$_{2}$O and N$_{2}$O. C) Cu(NO$_{3}$)$_{2}$, H$_{2}$O and NO$_{2}$. D) Cu(NO$_{3}$)$_{2}$, H$_{2}$O and NO. Show Answer Correct Answer: C) Cu(NO$_{3}$)$_{2}$, H$_{2}$O and NO$_{2}$. 47. What is the oxidation state of nitrogen in dinitrogen pentaoxide A) +3. B) +5. C) +6. D) +2. Show Answer Correct Answer: B) +5. 48. Reaction of HNO3 with I, S, P and C gives respectively. A) HIO3, H2SO4, H3PO4, CO2. B) HIO3, H2SO4, H3PO3and CO2. C) I2O5, H2SO4, H3PO4, CO. D) I2O5, SO2, P2O5, CO2. Show Answer Correct Answer: A) HIO3, H2SO4, H3PO4, CO2. 49. Which one of the following compounds is most explosive A) As Cl$_{3}$. B) P Cl$_{3}$. C) NF$_{3}$. D) NCl$_{3}$. Show Answer Correct Answer: D) NCl$_{3}$. 50. On heating lead nitrate forms oxides of nitrogen and lead. The oxides formed are ..... A) NO$_{2}$, PbO. B) N$_{2}$O, PbO. C) NO, PbO$_{2}$. D) NO, PbO. Show Answer Correct Answer: A) NO$_{2}$, PbO. 51. What is the molecular formula of chilie salt petre? A) Ca(NO3)2. B) NaNO3. C) Ba(NO3)2. D) KNO3. Show Answer Correct Answer: B) NaNO3. 52. PCl$_{5 }$exists as ..... in the solid state A) PCl$_{3}$. B) PCl$_{6}$$^{+}$. C) [PCl$_{4}$]$^{+}$[PCl$_{6}$]$^{-}$. D) PCl$_{5 }$. Show Answer Correct Answer: C) [PCl$_{4}$]$^{+}$[PCl$_{6}$]$^{-}$. 53. Arrange the following hydrides of group 16 elements in order of increasing stability A) H$_{2}$O B) H$_{2}$Te< H$_{2}$Se< H$_{2}$S< H$_{2}$O. C) H$_{2}$SH$_{2}$Se. D) H$_{2}$O< H$_{2}$S< H$_{2}$Se Show Answer Correct Answer: B) H$_{2}$Te< H$_{2}$Se< H$_{2}$S< H$_{2}$O. 54. Bismuth forms stable compound in +3 state than in +5 state . Why? A) Inert pair effect. B) Doesnot form stable compound. C) All the above. D) None of the above. Show Answer Correct Answer: A) Inert pair effect. 55. Which of the following molecules has only ONE lone pair of electrons on the central atom? A) SF$_{6}$. B) XeF$_{6}$. C) XeF$_{4}$. D) XeF$_{2}$. Show Answer Correct Answer: B) XeF$_{6}$. 56. Ionization energy of N family is exceptionally high due to the A) Exact Half filled Configuration. B) Shielding Effect. C) Higher size. D) None of these. Show Answer Correct Answer: A) Exact Half filled Configuration. 57. General formula of silicones A) -(R3SiO)n-. B) -(RSiO)n-. C) -(R2SiO2)n-. D) -(R2SiO)n-. Show Answer Correct Answer: D) -(R2SiO)n-. 58. What gas is always produced when a metal reacts with acid? A) Carbon dioxide. B) Hydrogen. C) Nitrogen. D) Oxygen. Show Answer Correct Answer: B) Hydrogen. 59. Correct order of negative Electron Gain Enthalpy is A) O < Po < Te < Se < S. B) Po < Te < O < Se < S. C) Po < Te < Se < O < S. D) Po < Te < Se < S < O. Show Answer Correct Answer: A) O < Po < Te < Se < S. 60. What is the formula of Caro's acid A) H2SO5. B) H2SO3. C) H2S2O8. D) H2SO4. Show Answer Correct Answer: A) H2SO5. ← 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 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books