Chapter 14 p block(II) PART 1 The group 15 elements(N.PAs Sb Bi) 1.Within group 15,the trend in values of AH(298 K)is: A.N>P>As>Sb B.NSb>As>P D.N>PP-O B.N-FP-P 6.Which statement is incorrect? A.White phosphorus is metastable
Chapter 14 p block (II) PART 1 The group 15 elements (N,P As Sb Bi) 1.Within group 15, the trend in values of ΔaHo (298 K) is: A. N > P > As > Sb B. N Sb > As > P D. N > P P–O B. N–F P–P 6. Which statement is incorrect? A. White phosphorus is metastable 1
B.White phosphorus is the standard state of the element C.AH(P black)is negative D.AH(Pred)is positive 7.Which statement is correct? A.N2H is a stronger base than NH3 B.NH2Cl is explosive C.NH2OH is a stronger base than NH D.The most favoured conformer of N2H is a staggered one 8.Which reaction is unlikely to work? A.AsF3+SbFs-[AsF2]*+[SbF6] B.AICls+SbCls-[SbClaT+[AICLT C.SbCls+5HFSbFs+5HCI D.2SbCl3 +Cl2+4CsCl-4Cs*+[SbCl6+[SbCl6] 9.Which statement is incorrect about these oxoacids of phosphorus? A.H3PO3 is a reducing agent B.HaP2O is tetrabasic C.H3PO is made by treating phosphate rock with dilute HaSO D.H3PO2 is monobasic 10.Which of the following reactions of (NPCl2)s would fail to work? A.Reaction of Me2NH to give NMe2 for Cl substitution with the second substitution taking place at the same Patom as the first B.Reaction of water to exchange OH for Cl C.Reaction of NaF to give Ffor Cl substitution with the second substitution taking place at the same P atom as the first D.Reaction with CHsLi to eliminate LiCl 11.In which compound is P in the highest oxidation state? A.[PF6T B.[PPha]" C.PCls D.PaOs
B. White phosphorus is the standard state of the element C. ΔfHo (P, black) is negative D. ΔfHo (P, red) is positive 7. Which statement is correct? A. N2H4 is a stronger base than NH3 B. NH2Cl is explosive C. NH2OH is a stronger base than NH3 D. The most favoured conformer of N2H4 is a staggered one 8. Which reaction is unlikely to work? A. AsF3 + SbF5 → [AsF2] + + [SbF6] – B. AlCl3 + SbCl5 → [SbCl4] + + [AlCl4] – C. SbCl5 + 5HF → SbF5 + 5HCl D. 2SbCl3 + Cl2 + 4CsCl → 4Cs+ + [SbCl6] – + [SbCl6] 3– 9. Which statement is incorrect about these oxoacids of phosphorus? A. H3PO3 is a reducing agent B. H4P2O6 is tetrabasic C. H3PO4 is made by treating phosphate rock with dilute H2SO4 D. H3PO2 is monobasic 10. Which of the following reactions of (NPCl2)3 would fail to work? A. Reaction of Me2NH to give NMe2 for Cl substitution with the second substitution taking place at the same P atom as the first B. Reaction of water to exchange OH for Cl C. Reaction of NaF to give F for Cl substitution with the second substitution taking place at the same P atom as the first D. Reaction with C6H5Li to eliminate LiCl 11. In which compound is P in the highest oxidation state? A. [PF6] – B. [PPh4] + C. PCl3 D. P4O6 2
12.Which statement is incorrect about the solid-state structure of NiAs? A.The As atoms are in a simple cubic arrangement B.The As centres are 6-coordinate C.The Ni centres are 6-coordinate D.Each As centre is in a trigonal prismatic coordination environment 13.Which statement is incorrect? A.In the 19F NMR spectrum of PFs at 298 K,two multiplets are observed B.NBr is explosive,even at relatively low temperatures C.In [F2NO][AsF the [F2NO]ion is planar D.PF3 is protonated by HF/SbFs 14.Which of the following reactions is a redox reaction? A.2NF3+3H2→N2+6HF B.NH+HBr→NHBr C.HNO3+KOH→H2O+KNOg D.N2O3+H20→2HNO2 15.When heated,which metal nitrate would give the respective metal,NO and O? A.AgNO3 B.Cu(NO3)2 C.Pb(NO3)2 D.KNO3 16.All of the following.expect one,are radicals.Which is diamagnetic? A.NOz B.NO C.FNO D.NF2 17.Match up the following acids to the basicities.Which pairing is correct? A.Phosphoric acid;dibasic B.Phosphinic acid;monobasic C.Phosphonic acid;monobasic D.Diphosphoric acid;dibasic
12. Which statement is incorrect about the solid-state structure of NiAs? A. The As atoms are in a simple cubic arrangement B. The As centres are 6-coordinate C. The Ni centres are 6-coordinate D. Each As centre is in a trigonal prismatic coordination environment 13. Which statement is incorrect? A. In the 19F NMR spectrum of PF5 at 298 K, two multiplets are observed B. NBr3 is explosive, even at relatively low temperatures C. In [F2NO][AsF6], the [F2NO]+ ion is planar D. PF3 is protonated by HF/SbF5 14. Which of the following reactions is a redox reaction? A. 2NF3 + 3H2 → N2 + 6HF B. NH3 + HBr → NH4Br C. HNO3 + KOH → H2O + KNO3 D. N2O3 + H2O → 2HNO2 15. When heated, which metal nitrate would give the respective metal, NO2 and O2? A. AgNO3 B. Cu(NO3)2 C. Pb(NO3)2 D.KNO3 16. All of the following, expect one, are radicals. Which is diamagnetic? A. NO2 B. NO C. FNO D. NF2 17. Match up the following acids to the basicities. Which pairing is correct? A. Phosphoric acid; dibasic B. Phosphinic acid; monobasic C. Phosphonic acid; monobasic D. Diphosphoric acid; dibasic 3
18.What type of a reaction is the conversion of H3PO to HP2O? A.Neutralization B.Hydrolysis C.Condensation D.Reduction 19.A potential diagram for nitrogen at pHshows the following Evalues NOl-一HNO2E°=+0.93V NO2→NOE°=+0.98V What is the value of E for the reduction of [NO3]-to NO? A.+0.95V B.+1.91V C.+0.64V D.+0.96V 20.To which point group does the SbFs molecule belong? A.C3v B.Dsh C.Cah D.Cav ANSWERS: 1.Within group 15,the trend in values of A H(298 K)is: Correct Answer:N>P>As>Sb 2.When NH3 burns in O2,the products are Correct Answer:N2 and H2O 3.Which of the following compounds is not potentially explosive? Correct Answer:N2O 4.Which shape correctly describes the stated molecule? Correct Answer:PCl3;trigonal pyramidal 5.Which trend in bond enthalpy terms is correct? Correct Answer:N-F<P-F 6.Which statement is incorrect?
18. What type of a reaction is the conversion of H3PO4 to H4P2O7? A. Neutralization B. Hydrolysis C. Condensation D. Reduction 19. A potential diagram for nitrogen at pH 0 shows the following Eo values: [NO3]- → HNO2 Eo = +0.93 V HNO2 → NO Eo = +0.98 V What is the value of Eo for the reduction of [NO3]- to NO? A. +0.95 V B. +1.91 V C. +0.64 V D. +0.96 V 20. To which point group does the SbF5 molecule belong? A. C3v B. D3h C. C3h D. C4v ANSWERS: 1. Within group 15, the trend in values of ΔaHo (298 K) is: Correct Answer: N > P > As > Sb 2. When NH3 burns in O2, the products are: Correct Answer: N2 and H2O 3. Which of the following compounds is not potentially explosive? Correct Answer: N2O 4. Which shape correctly describes the stated molecule? Correct Answer: PCl3; trigonal pyramidal 5. Which trend in bond enthalpy terms is correct? Correct Answer: N–F < P–F 6. Which statement is incorrect? 4
Correct Answer:AH(P red)is positive 7.Which statement is correct? Correct Answer:NH2Cl is explosive 8.Which reaction is unlikely to work? Correct Answer:AICls+SbCls-[SbCl]*+[AICl] 9.Which statement is incorrect about these oxoacids of phosphorus? Correct Answer:H3PO,is made by treating phosphate rock with dilute H2SO 10.Which of the following reactions of (NPCl2)would fail to work? Correct Answer:Reaction of Me2NH to give NMe2 for Cl substitution with the second substitution taking place at the same Patom as the first 11.In which compound isPin the highest oxidation state? Correct Answer:[PF 12.Which statement is incorrect about the solid-state structure of NiAs? Correct Answer:The As atoms are in a simple cubic arrangement 13.Which statement is incorrect? Correct Answer:In the 19F NMR spectrum of PFs at 298 K,two multiplets are observed 14.Which of the following reactions is a redox reaction? Correct Answer:2NF3+3H2-N2+6HF 15.When heated,which metal nitrate would give the respective metal,NO2 and 022 Correct Answer:AgNO3 16.All of the following,expect one,are radicals.Which is diamagnetic? Correct Answer:FNO 17.Match up the following acids to the basicities.Which pairing is correct? Correct Answer:Phosphinic acid,monobasic 18.What type of a reaction is the conversion of H3PO to HP2O? Correct Answer: 19.Apotential diagram for nitrogen at pHshows the following Evalues NO→HNO2E°=+0.93V 5
Correct Answer: ΔfHo (P, red) is positive 7. Which statement is correct? Correct Answer: NH2Cl is explosive 8. Which reaction is unlikely to work? Correct Answer: AlCl3 + SbCl5 → [SbCl4] + + [AlCl4] – 9. Which statement is incorrect about these oxoacids of phosphorus? Correct Answer: H3PO4 is made by treating phosphate rock with dilute H2SO4 10. Which of the following reactions of (NPCl2)3 would fail to work? Correct Answer: Reaction of Me2NH to give NMe2 for Cl substitution with the second substitution taking place at the same P atom as the first 11. In which compound is P in the highest oxidation state? Correct Answer: [PF6] – 12. Which statement is incorrect about the solid-state structure of NiAs? Correct Answer: The As atoms are in a simple cubic arrangement 13. Which statement is incorrect? Correct Answer: In the 19F NMR spectrum of PF5 at 298 K, two multiplets are observed 14. Which of the following reactions is a redox reaction? Correct Answer: 2NF3 + 3H2 → N2 + 6HF 15. When heated, which metal nitrate would give the respective metal, NO2 and O2? Correct Answer: AgNO3 16. All of the following, expect one, are radicals. Which is diamagnetic? Correct Answer: FNO 17. Match up the following acids to the basicities. Which pairing is correct? Correct Answer: Phosphinic acid; monobasic 18. What type of a reaction is the conversion of H3PO4 to H4P2O7? Correct Answer: 19. A potential diagram for nitrogen at pH 0 shows the following Eo values: [NO3] - → HNO2 Eo = +0.93 V 5
HNO2→NOE=+0.98V What is the value of E for the reduction of [NO3]to NO? Correct Answer:+0.95 V 20.To which point group does the SbFs molecule belong? Correct Answer:D3h Part 2 The group 16 elements(O,S,Se,Te,PO) 1.ond enthalpy terms in group 16 follow which one of the following trends? AS-S>0-0 B.Se-Se>S-S C.S=S>0=0 D.S-F<O-F 2.Which statement is correct? A.PtF oxidizes O2 to [O] B.O2F2 reacts with BF3 to give [O][BF2 C.Ozonides contain diamagnetic [O D.The bond distance in [O2is shorter than in O2. 3.Match up the ring and its shape.Which pairing is incorrect A.S8;crown B.S6;chair C.[S planar D.[Ss2 plana 4.Which statement about H2O2 is incorrect? A.HO2 is kinetically stable with respect to decomposition to H2Oand O B.H2O2 is thermodynamically stable with respect to decomposition to H2Oand O C.H2O2 is explosive when in contact with readily oxidized materials D.H2O2 reacts with Cl2 to release O2 5.Match up the molecule or ion and its shape.Which pairing is incorrect? A.[S3]2;non-linear B.[SF广；trigonal pyramidal
HNO2 → NO Eo = +0.98 V What is the value of Eo for the reduction of [NO3] - to NO? Correct Answer: +0.95 V 20. To which point group does the SbF5 molecule belong? Correct Answer: D3h Part 2 The group 16 elements (O, S, Se, Te, PO) 1. ond enthalpy terms in group 16 follow which one of the following trends? A. S–S > O–O B. Se–Se > S–S C. S=S > O=O D. S–F < O–F 2. Which statement is correct? A. PtF6 oxidizes O2 to [O2] + . B. O2F2 reacts with BF3 to give [O2][BF4]2 C. Ozonides contain diamagnetic [O3 ]–. D. The bond distance in [O2] 2– is shorter than in O2. 3. Match up the ring and its shape. Which pairing is incorrect? A. S8; crown B. S6; chair C. [S4]2+ ; planar D. [S8]2+ ; planar 4. Which statement about H2O2 is incorrect ? A. H2O2 is kinetically stable with respect to decomposition to H2O and O2 B. H2O2 is thermodynamically stable with respect to decomposition to H2O and O2 C. H2O2 is explosive when in contact with readily oxidized materials D. H2O2 reacts with Cl2 to release O2 5. Match up the molecule or ion and its shape. Which pairing is incorrect? A. [S3]2– ; non-linear B. [SF3] + ; trigonal pyramidal 6
C.SF;tetrahedral D.[SFs];square-based pyramidal 6.In which halide is a lone pair on the Te atom stereochemically inactive? A.[TeCl6]- B.[TeFs] C.[TeF D.TeF 7.Which statement is incorrect? A.Monomers and trimers of SO3 exist in the gas phase B.SO2 is a gas at 298 K and contains non-linear molecules C.SeOs is monomeric in the solid state D.Gaseous SeO2 contains non-linear,monomeric molecules 8.Which acid is thiosulfuric acid? A.H2S2Og B.H2S207 C.H2S2O4 D.H2S2O3 9.Which acid cannot be isolated? A.H2SeO3 B.H2S206 C.HSO;CI D.HeTeO 10.Which reaction is a method of preparing NSF? A.SaNa with AgF2 B.SaNa with AsFs C.SaNa with HgF2 D.S4N4 with HBF4 11.The reaction of SFa with CsF would produce: A.[SFsT B.S2F2
C. SF4; tetrahedral D. [SF5] – ; square-based pyramidal 6. In which halide is a lone pair on the Te atom stereochemically inactive? A. [TeCl6] 2– B. [TeF8] 2– C. [TeF7] – D. TeF6 7. Which statement is incorrect? A. Monomers and trimers of SO3 exist in the gas phase B. SO2 is a gas at 298 K and contains non-linear molecules C. SeO3 is monomeric in the solid state D. Gaseous SeO2 contains non-linear, monomeric molecules 8. Which acid is thiosulfuric acid? A. H2S2O8 B. H2S2O7 C. H2S2O4 D. H2S2O3 9. Which acid cannot be isolated? A. H2SeO3 B. H2S2O6 C. HSO3Cl D. H6TeO6 10.Which reaction is a method of preparing NSF? A. S4N4 with AgF2 B. S4N4 with AsF5 C. S4N4 with HgF2 D. S4N4 with HBF4 11. The reaction of SF4 with CsF would produce: A. [SF5] – B. S2F2 7
C.SF6 D.[SF3] 12.Which statement is incorrect about [S? A.It is an allotrope of sulfur B.It is paramagnetic C.It has a cyelic structure D.It adopts a chair conformation 13 Which statement about H2S is incorrect? A.It reacts with lead(II)acetate to give a yellow precipitate B.It is a gas at 298K C.It can be made by the hydrolysis of CaS D.It is highly toxic 14.In which reaction is sulfur oxidized? A.2IS20,P-+12→[S062+2I B.SO2+PCls-SOCl2+POCl3 C.2SCIFs +H2-S2F1o+2HCl D.Na2SO3 +2HCI-SO2 +2NaCl H2O 15.Which of the following has a linear structure? A.[NS2]" B.SO2 C.[S2- D.NSF 16.What symmetry does an SO;molecule possess? A.C3v B.D3h C.Czv D.D3 17.One method of manufacturing SO2 is by roasting iron sulfide: 4feS2+1102→2Fez03+8S02 Which of the following statements is correct about this reaction?
C. SF6 D. [SF3] + 12. Which statement is incorrect about [S6] – ? A. It is an allotrope of sulfur B. It is paramagnetic C. It has a cyclic structure D. It adopts a chair conformation 13 Which statement about H2S is incorrect? A. It reacts with lead(II) acetate to give a yellow precipitate B. It is a gas at 298 K C. It can be made by the hydrolysis of CaS D. It is highly toxic 14. In which reaction is sulfur oxidized? A. 2[S2O3 ]2– + I2 →[S4O6] 2– + 2I– B. SO2 + PCl5 → SOCl2 + POCl3 C. 2SClF5 + H2 → S2F10 + 2HCl D. Na2SO3 + 2HCl → SO2 + 2NaCl + H2O 15. Which of the following has a linear structure? A. [NS2] + B. SO2 C. [S3] 2– D. NSF 16. What symmetry does an SO3 molecule possess? A. C3v B. D3h C. C2v D. D3 17. One method of manufacturing SO2 is by roasting iron sulfide: 4FeS2 + 11O2 → 2Fe2O3 + 8SO2 Which of the following statements is correct about this reaction? 8
A.Iron is reduced from Fe(IV)to Fe(III) B.Sulfur is oxidized from S(-II)to S(IV) C.Each S atom formally undergoes a 5-electron oxidation D.Each Fe atom undergoes a 2-electron reduction 18.The following data are for solutions at pH0: [S20]2+2e=2[S0]E°=+2.01V [Cr202+14H+6e.=2C+7H,0E°=+1.33V [Mn04J+8H+5e.=Mn2++4H20E°=+1.51V From the data,you can deduce that,at pH A.[S2Os]will oxidize Cr B.[S2Os]will reduce [MnO]- C.[SO will be oxidized by [Cr2O D.[S2Oswill reduce [Cra 19.Which statement is incorrect about sulfuric acid? A.Crystalline H2SO possesses a hydrogen-bonded 3-dimensional network B.Pure liquid H2SO,is viscous because of intramolecular hydrogen bonding C.HSO is dibasic.In the first and second acid dissociation steps,it behaves as a strong and as a fairly weak acid,respectively D.Gas phase H2SO4 possesses C2 symmetry 20.Which of the following is a greenhouse gas under the 1997 Kyoto Protocol? A.OF2 B.SOz C.H2S D.SF6 ANSWERS: 1.Bond enthalpy terms in group 16 follow which one of the following trends? Correet Answer:S-S>O-O 2.Which statement is correct? Correct Answer:PtF oxidizes O2 to [O] 3. Match up the ring and its shape.Which pairing is incorrect? 9
A. Iron is reduced from Fe(IV) to Fe(III) B. Sulfur is oxidized from S(-II) to S(IV) C. Each S atom formally undergoes a 5-electron oxidation D. Each Fe atom undergoes a 2-electron reduction 18. The following data are for solutions at pH 0: [S2O8] 2- + 2e- = 2[SO4] 2- Eo = +2.01 V [Cr2O7] 2- + 14H+ + 6e- = 2Cr3+ + 7H2O Eo = +1.33 V [MnO4] - + 8H+ + 5e- = Mn2+ + 4H2O Eo = +1.51 V From the data, you can deduce that, at pH 0: A. [S2O8] 2- will oxidize Cr3+ B. [S2O8] 2- will reduce [MnO4]- C. [SO4] 2- will be oxidized by [Cr2O7] 2- D. [S2O8] 2- will reduce [Cr2O7] 2- 19. Which statement is incorrect about sulfuric acid? A. Crystalline H2SO4 possesses a hydrogen-bonded 3-dimensional network B. Pure liquid H2SO4 is viscous because of intramolecular hydrogen bonding C. H2SO4 is dibasic. In the first and second acid dissociation steps, it behaves as a strong and as a fairly weak acid, respectively D. Gas phase H2SO4 possesses C2 symmetry 20. Which of the following is a greenhouse gas under the 1997 Kyoto Protocol? A. OF2 B. SO2 C. H2S D. SF6 ANSWERS: 1. Bond enthalpy terms in group 16 follow which one of the following trends? Correct Answer: S–S > O–O 2. Which statement is correct? Correct Answer: PtF6 oxidizes O2 to [O2] + . 3. Match up the ring and its shape. Which pairing is incorrect? 9
Correct Answer:[Ss];planar 4.Which statement about H2O2 is incorrect? Correct Answer:H2O2 is thermodynamically stable with respect to decomposition to H2O and O2 5.Match up the molecule or ion and its shape.Which pairing is incorrect? Correct Answer:SF4:tetrahedral 6.In which halide is a lone pair on the Te atom stereochemically inactive? Correct Answer:[TeCl] 7.Which statement is incorrect? Correct Answer:SeO;is monomeric in the solid state 8.Which acid is thiosulfuric acid? Correct Answer:H2S2O; 9.Which acid cannot be isolated? Correct Answer:H2S2O 10.Which reaction is a method of preparing NSF? Correct Answer:S4N4 with HgF2 11.The reaction of SF4 with CsF would produce Correct Answer:[SF 12.Which statement is incorrect about [S? Correct Answer:It is an allotrope of sulfur 13.Which statement about H2S is incorrect? Correct Answer:It reacts with lead(II)acetate to give a yellow precipitate 14.In which reaction is sulfur oxidized? Correct Answer:2[S203+I2[SO62+2 15.Which of the following has a linear structure? Correct Answer:[NS2] 16.What symmetry does an SO3 molecule possess? Correct Answer:D3h 17.One method of manufacturing SO2 is by roasting iron sulfide 4FeS2+1102-2Fe2O3+8S02 0
Correct Answer: [S8] 2+; planar 4. Which statement about H2O2 is incorrect ? Correct Answer: H2O2 is thermodynamically stable with respect to decomposition to H2O and O2 5. Match up the molecule or ion and its shape. Which pairing is incorrect? Correct Answer: SF4; tetrahedral 6. In which halide is a lone pair on the Te atom stereochemically inactive? Correct Answer: [TeCl6] 2– 7. Which statement is incorrect? Correct Answer: SeO3 is monomeric in the solid state 8. Which acid is thiosulfuric acid? Correct Answer: H2S2O3 9. Which acid cannot be isolated? Correct Answer: H2S2O6 10. Which reaction is a method of preparing NSF? Correct Answer: S4N4 with HgF2 11. The reaction of SF4 with CsF would produce: Correct Answer: [SF5 ]– 12. Which statement is incorrect about [S6] – ? Correct Answer: It is an allotrope of sulfur 13. Which statement about H2S is incorrect? Correct Answer: It reacts with lead(II) acetate to give a yellow precipitate 14. In which reaction is sulfur oxidized? Correct Answer: 2[S2O3] 2– + I2 →[S4O6] 2– + 2I– 15. Which of the following has a linear structure? Correct Answer: [NS2] + 16. What symmetry does an SO3 molecule possess? Correct Answer: D3h 17. One method of manufacturing SO2 is by roasting iron sulfide: 4FeS2 + 11O2 → 2Fe2O3 + 8SO2 10