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 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 7 P Block Elements Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. As you move down the group, halogens' reactivity ..... A) Shows no trend. B) Doesn't change. C) Decreases. D) Increases. Show Answer Correct Answer: C) Decreases. 2. The most stable oxidation states of nitrogen are A) -3, +3, +5. B) -3, 0 and-1. C) -3, +3and 0. D) 3, +3 and-5. Show Answer Correct Answer: A) -3, +3, +5. 3. What is the name of the following ion?S$^{2-}$ A) Sulfur (II) ion. B) Sulfide ion. C) Sulfur ion. D) Sulfate ion. Show Answer Correct Answer: B) Sulfide ion. 4. In the preparation of compounds of Xe, Bartlett had taken O2$^{+}$PtF6$^{-}$ as a base compound. This is because A) (i) both O2 and Xe have same size. B) (ii) both O2 and Xe have same electron gain enthalpy. C) (iii) both O2 and Xe have almost same ionisation enthalpy. D) (iv) both Xe and O2 are gases. Show Answer Correct Answer: C) (iii) both O2 and Xe have almost same ionisation enthalpy. 5. Helium is a good insulator. Why? A) Helium do not contains mobile electrons. B) Helium is not inert. C) Helium is light. D) Helium do not contains mobile ions. Show Answer Correct Answer: A) Helium do not contains mobile electrons. 6. Advait is studying the atomic radii of Al in his chemistry class. A) 143pm. B) 170pm. C) 167pm. D) 135pm. Show Answer Correct Answer: A) 143pm. 7. Which property of halogen decreases down the group? A) Reducing ability of halides. B) Boiling point. C) Thermal stability. D) Bond energy of the hydrogen halogen bond. Show Answer Correct Answer: D) Bond energy of the hydrogen halogen bond. 8. Which of the following species has the highest dipole moment? A) AsH3. B) PH3. C) SbH3. D) NH3. Show Answer Correct Answer: D) NH3. 9. Which of the following shows N in its increasing order of oxidation no.? A) NH$^{+}$$_{4}$ B) N$_{2}$O C) NH$^{+}$$_{4}$< N$_{2}$O< NO D) NH$^{+}$$_{4}$< NO Show Answer Correct Answer: C) NH$^{+}$$_{4}$< N$_{2}$O< NO 10. Copper on reaction with dilute HNO$_{3}$ gives x and Copper on reaction with concentrated HNO$_{3}$ gives y. Identify x and y. A) X = NO2, y = N2O. B) X = N2O, y = NO2. C) X = NO, y = NO2. D) X = N2O, y = NO. Show Answer Correct Answer: C) X = NO, y = NO2. 11. Abnormal behaviour of B, C, N, O anf F is due to A) Small size. B) High electronegativity. C) Absence of d orbitals. D) All of the above. Show Answer Correct Answer: D) All of the above. 12. The explosive formed when NH3 reacts with excess Cl2 is A) NCl2. B) NCl5. C) NH4Cl. D) NCl3. Show Answer Correct Answer: D) NCl3. 13. The structure of white phosphorus is A) Square planar. B) Tetrahedral. C) Pyramidal. D) Trigonal planar. Show Answer Correct Answer: B) Tetrahedral. 14. The maximum covalency of Nitrogen is A) -3. B) +3. C) +5. D) +4. Show Answer Correct Answer: D) +4. 15. What is the shape of XeF2 A) Linear. B) Tetrahedral. C) Octahedral. D) Triangular planar. Show Answer Correct Answer: A) Linear. 16. Al4C3 on hydrolysis give A) C2H2. B) C2H6. C) C2H4. D) CH4. Show Answer Correct Answer: D) CH4. 17. Which of the following oxides of nitrogen is the anhydride of HNO3 a. N$_{2}$O b. NO c. N$_{2}$O$_{5 }$ d. N$_{2}$O$_{3}$ A) N$_{2}$O. B) N$_{2}$O$_{3}$. C) N$_{2}$O$_{5}$. D) NO. Show Answer Correct Answer: C) N$_{2}$O$_{5}$. 18. . Which of the following factors would favor the formation of ammonia in Haber's process? A) Low temperature. B) High pressure. C) Low pressure. D) High volume. Show Answer Correct Answer: B) High pressure. 19. What is the formula for the following ion:selenide ion A) Se$^{-}$. B) SeO$_{3}$$^{2-}$. C) Se$^{2+}$. D) Se$^{2-}$. E) Se$^{+}$. Show Answer Correct Answer: D) Se$^{2-}$. 20. The maximum covalency of N is A) 2. B) 4. C) 3. D) 1. Show Answer Correct Answer: B) 4. 21. Ionisation enthalpy of group 15 elements is greater than group 16 elements due to A) Completely filled and half filled orbitals of group15 elements. B) Completely filled and fully filled orbitals of group15 elements. C) Both of the above. D) None of the above. Show Answer Correct Answer: A) Completely filled and half filled orbitals of group15 elements. 22. The oxidation numbers of sulphur in S8, S2F2, H2S, respectively, are-[IIT-1999] A) 0, + 1 and-2. B) + 2, + 1 and-2. C) 0, + 1 and + 2. D) -2, + 1 and-2. Show Answer Correct Answer: A) 0, + 1 and-2. 23. Which of the following p-block elements is a metalloid? A) Oxygen. B) Carbon. C) Silicon. D) Sulphur. Show Answer Correct Answer: C) Silicon. 24. When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from A) Zero to-1 and zero to +3. B) Zero to + 1 and zero to-3. C) Zero to + 1 and zero to-5. D) Zero to-1 and zero to +5. Show Answer Correct Answer: D) Zero to-1 and zero to +5. 25. What type of bond do crown ethers primarily form with cations? A) Electrostatic. B) Covalent. C) Ionic. D) Hydrogen. Show Answer Correct Answer: A) Electrostatic. 26. On heating a mixture of NH$_{4}$Cl & KNO$_{3}$ we get A) N$_{2}$. B) KNH$_{4}$(NO$_{3}$)$_{2}$. C) NH$_{4}$NO$_{3}$. D) NO. Show Answer Correct Answer: A) N$_{2}$. 27. Which group 2 element doesnt react with water A) Ca. B) Mg. C) Sr. D) Be. Show Answer Correct Answer: D) Be. 28. Disulphuric acid is also known as A) Peroxomonosulphuric acid. B) Marshal's acid. C) Oleum. D) Caro's acid. Show Answer Correct Answer: C) Oleum. 29. Nitrogen shows maximum covalency of A) 3. B) 4. C) 5. D) None of these. Show Answer Correct Answer: B) 4. 30. Which of the following is not a pseudohalogen? A) (OCN)$_{2}$. B) (SCN)$_{2}$. C) (NO$_{2}$)$_{2}$. D) (CN)$_{2}$. Show Answer Correct Answer: C) (NO$_{2}$)$_{2}$. 31. Inorganic Benzene is A) Benzene. B) Napthalene. C) Borazole. D) None of the above. Show Answer Correct Answer: C) Borazole. 32. What role do s and p-block elements play in biological systems? A) S and p-block elements are crucial for forming biomolecules and supporting cellular functions. B) S and p-block elements are only found in inorganic compounds. C) S and p-block elements have no significant role in living organisms. D) S and p-block elements are primarily used in industrial processes. Show Answer Correct Answer: A) S and p-block elements are crucial for forming biomolecules and supporting cellular functions. 33. The comparatively high boiling point of hydrogen fluoride is due to A) High reactivity of fluorine. B) Small size of H atom. C) Formation of H bonds. D) Small size of fluorine. Show Answer Correct Answer: C) Formation of H bonds. 34. Which compound was the first compound of noble gas? A) XePtF$_{6}$. B) ArPtF$_{6}$. C) NePtF$_{6}$. D) None. Show Answer Correct Answer: A) XePtF$_{6}$. 35. Fill in the blanks by choosing an appropriate option (i) is a synthetic radioactive element of group 15 having electronic configuration (ii). A) $_{116}$Lv [Rn] 5f$^{14}$ 6d$^{10}$7s$^{2}$p$^{4}$. B) $_{117}$Fl [Rn] 5f$^{14}$ 6d$^{10}$7s$^{2}$p$^{2}$. C) $_{115}$Mc [Xe] 5f$^{14}$ 6d$^{10}$7s$^{2}$p$^{3}$. D) $_{115}$Mc [Rn] 5f$^{14}$ 6d$^{10}$7s$^{2}$p$^{3}$. Show Answer Correct Answer: D) $_{115}$Mc [Rn] 5f$^{14}$ 6d$^{10}$7s$^{2}$p$^{3}$. 36. Which of the following compounds will not give ammonia on heating? A) NH$_{2}$CONH$_{2}$. B) NH$_{4}$Cl. C) (NH$_{4}$)$_{2}$SO$_{4}$. D) NH$_{4}$NO$_{2}$. Show Answer Correct Answer: D) NH$_{4}$NO$_{2}$. 37. Which group does selenium belong to A) Group 16. B) Group 14. C) Group 13. D) Group 2. Show Answer Correct Answer: A) Group 16. 38. The water repelling character of silicones is due to A) Tetravalency of silicon. B) Presence of alkyl or aryl groups. C) Chemical inertness. D) Strong Si-O-Si linkage. Show Answer Correct Answer: B) Presence of alkyl or aryl groups. 39. Per-carbonates contain: A) Extra oxygen atoms. B) Extra carbon atoms. C) Free radicals. D) Hydrogen bonding. Show Answer Correct Answer: A) Extra oxygen atoms. 40. Choose the tribasic acid A) H$_{2}$P$_{2}$O$_{7}$. B) H$_{3}$PO$_{3}$. C) H$_{3}$PO$_{2}$. D) H$_{3}$PO$_{4}$. Show Answer Correct Answer: D) H$_{3}$PO$_{4}$. 41. Among the given statements about the +4 oxidation state in Group 14, which is incorrect? A) Tin (Sn) and lead (Pb) prefer the +4 oxidation state due to the inert pair effect. B) Silicon (Si) readily forms compounds in the +4 oxidation state, indicative of its group characteristics. C) Carbon (C) exhibits stability in the +4 oxidation state, a common feature across Group 14 elements. D) None of the above. Show Answer Correct Answer: A) Tin (Sn) and lead (Pb) prefer the +4 oxidation state due to the inert pair effect. 42. Reactivity of halogen decreases going down the group because A) Electrons are closer to the nucleus. B) Atomic size decreases down the group. C) The 8th electron difficult to attract by nucleus. D) Screening effect decreases. Show Answer Correct Answer: C) The 8th electron difficult to attract by nucleus. 43. In the structure of PCl$_{5}$, the P-Cl$_{axial}$ bonds are longer than P-Cl$_{equatorial}$ bond becauseIn the structure of PCl$_{5}$, the P-Cl$_{axial}$ bonds are longer than P-Cl$_{equatorial}$ bond because A) Unequal bond lengths are more stable. B) Axial bond pairs suffer less repulsion. C) Axial bond pairs suffer more repulsion. D) Equatorial bond pairs suffer more repulsion. Show Answer Correct Answer: C) Axial bond pairs suffer more repulsion. 44. Correct order of bond dissociation enthalpy is A) I$_{2}$ < Br$_{2}$ < F$_{2 }$ < Cl$_{2}$. B) Br$_{2}$ < Cl$_{2}$ < F$_{2 }$ < $_{ }$I$_{2}$. C) I$_{2}$ < Br$_{2}$ < Cl$_{2}$ < F$_{2}$. D) I$_{2}$ < F$_{2}$ < Br$_{2}$ < Cl$_{2}$. Show Answer Correct Answer: D) I$_{2}$ < F$_{2}$ < Br$_{2}$ < Cl$_{2}$. 45. SO2 oxidation state is A) 6. B) 4. C) 2. D) 3. Show Answer Correct Answer: B) 4. 46. S-O-O-S bond is present in A) H$_{2}$S$_{2}$O$_{7}$. B) H$_{2}$SO$_{4}$. C) H$_{2}$S$_{2}$O$_{8}$. D) H$_{2}$S$_{2}$O$_{3}$. Show Answer Correct Answer: C) H$_{2}$S$_{2}$O$_{8}$. 47. Which of the following statements is true about p-block elements? A) They have a high electronegativity. B) They are exclusively non-metals. C) They can form multiple types of bonds. D) They are found in groups 13 to 18 of the periodic table. Show Answer Correct Answer: D) They are found in groups 13 to 18 of the periodic table. 48. Element G, L and J are located in Group 17 of the Periodic Table. Element J is more electronegative than element G. The reaction of red-hot iron wool with gas L is more vigorous than the reaction of red-hot iron wool with gas J. The reactivity of these three elements in ascending order is? A) L, G, J. B) G, J, L. C) J, G, L. D) L, J, G. Show Answer Correct Answer: B) G, J, L. 49. Which of the following is NOT an alloy of aluminum? A) Magnalium. B) Alnico. C) Duralumin. D) Bronze. Show Answer Correct Answer: D) Bronze. 50. What is the maximum covalency of boron? A) 6. B) 8. C) 4. D) 2. Show Answer Correct Answer: C) 4. 51. Phospham is prepared from A) Borazole. B) Diborane. C) Silicones. D) Phosphonitrilic halides. Show Answer Correct Answer: D) Phosphonitrilic halides. 52. Pb$_{3}$O$_{4}$ + 4HNO$_{3}$ A) 2Pb(NO$_{3}$)$_{2}$ + PbO$_{2}$ + 2H$_{2}$O. B) 2Pb(NO$_{3}$)$_{4}$ + PbO$_{2}$ + 2H$_{2}$O. C) 2Pb(NO$_{3}$)$_{2}$ + 2PbO$_{2}$ + 2H$_{2}$O. D) Pb(NO$_{3}$)$_{2}$ + PbO$_{2}$ + 2H$_{2}$O. Show Answer Correct Answer: A) 2Pb(NO$_{3}$)$_{2}$ + PbO$_{2}$ + 2H$_{2}$O. 53. Which of the carbonates given below is unstable in air and is kept inCO2atmosphere to avoid decomposition? A) MgCO3. B) BaCO3. C) BeCO3. D) CaCO3. Show Answer Correct Answer: C) BeCO3. 54. Assertion:The fluorine has lower reactivity.Reason:F-F bond has low bond dissociation energy.(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) D. B) B. C) C. D) A. Show Answer Correct Answer: C) C. 55. The compounds of boron and hydrogen are collectively called A) Borazoles. B) Boranes. C) Diboranes. D) Boracits. Show Answer Correct Answer: C) Diboranes. 56. Liquid ammonia bottles are opened after cooling them in ice for sometime. It is because liquid NH3 A) Is a mild explosive. B) Is a corrosive liquid. C) Has a high vapour pressure. D) Brings tears to the eyes. Show Answer Correct Answer: C) Has a high vapour pressure. 57. The general electronic configuration of p-block elements is A) Ns$^{1}$. B) Ns$^{2}$ np$^{1-6}$. C) Ns$^{2}$. D) (n-1)s$^{2}$ np1-6. Show Answer Correct Answer: B) Ns$^{2}$ np$^{1-6}$. 58. Which element has a higher electronegativity? A) Sulfur. B) Chlorine. C) All the above. D) None of the above. Show Answer Correct Answer: B) Chlorine. 59. Cl2 +H2O $\rightarrow$ A) Hcl. B) Hclo. C) Hclo + Hcl. D) Hclo3. Show Answer Correct Answer: C) Hclo + Hcl. 60. The shape of XeF4 is A) Octahedral. B) Pyramidal. C) Tetrahedral. D) Square planar. Show Answer Correct Answer: D) Square planar. 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