can i get some help please

choose the correct answer

2. 3118( contern) 615 (hove tentert) at 414 (comsen) 4 is (frue centeriv) la type of walid? a) Ir's fonh Solid (t) fr's Motallie Solid e) It s Molecular d) Ir'a a Covalent network notid e) Ir's Amprobour 23. In the erysals of which of the fallowing ionle compounds, the distance betwoen centen of the ditloss and : anions is the masinum? a) LiF b) F c) Cul d) Lil \&) CIF 24. In amines the alkyl groups contritude electrons to the nitrogen, inctraaing its argative charscter and akins it s. NHzMe, NH2, NMfey? a) NMesoNHMes NH2MeoNH b) NIEMer>NH (2Mes NH3>NM2 c) NHiMes NMer>NH,>NHMes d) NMes> NHaMe >NHMopNif e) NH3>NM es >NH2Me>NHM? 25. Which molocule is more acidie? (PKa value, HPO4=2,16;Cu,HH9,99;CJH2O=16;HtO15,7;H4SOv2=9 ) a) H2SO4 b) H2O c) C2H4O d) HPPO4 e) CiH,OH 26. Which one is not a coquigate acid base pair? a) HClO4ClO : b) H3PO4H2PO4 c) Hasis? d) OH:D2 e) CH2NH2CH2NH4 27. Which molecule cannot be considered as an Arrhenius acid? a) P4O10 b) NH4 : c) Mist d) CaO c) F(F,O,w1)3 28. In which solvent HCl shows more acidie character? a) NH3 b) H2O c) CHOOOH d) H2SO4 e) HE 29. Which can be explained by steric effects on acidl base strength? a) Fe3 is more acidic than Fe2+( ow) b) Na4 in is less acidic than Sr2+ (nt) c) NHiMe(ay is more basic than NHywa d) H3POsima is less acidic than H2SO4(abl e) 2-methylpyridine is more basie than 2-t-butylpyridineace 30. Within acid ionization constants as in the following, please identify the correct increasing order of bese strengths. HNO2Ka=4.5104;HFKt=6.8104;HCNK4=6.2104 a) CN+AsCl>PCl3 (6) H2Te>H2O>H2Se d) SCl2>SF2>SH2 d) PF3>PCl3>PBn BH>BF3>BCl 13. Which of the following is the correct decreasing order of the ionic radii? b) K+>Na>Rb>Li+ (b) Li+>Na+>K+>Rb+ \& Na+>K>Rb>Li d Li+>K+>Na+>Rb+ e) Rb+>K+>Na+>Li+ 14. Which of the following is electron configuration of second ionization energy of phosphorus? a) Is 2s22p63s23p3 b) 1s22s22p63s23p2 c) 1s22s22p63s23p1 d) 1s22s22p63s33p3 c) 1s22s22p63s23p0 15. Which of the following statements about nodes in H atom orbitals is true? A) d orbitals have one angular node B) p orbitals have no radials C) p orbitals have one angular node D) p orbitals have no angular nodes E) d orbitals have two radial nodes 16. The transition from the n=7 to the n=2 level of the hydrogen atom is accompanied by the emission of radiation sligh beyond the range of human perception, in the ultraviolet region. Determine the energy and wavelength. a) Energy; 2.1791018J Wavelength; 400nm b) Energy; 5.0031019J Wavelength; 397.1nm c) Energy; 5.0031019J Wavelength; 387.1nm d) Energy; 5.0031018J Wavelength; 400nm e) Energy; 2.1791018J Wavelength ; 387.1nm 17. What is the number of tetrahedral holes in face centered cubic unit cell? a) 2 b) 4 g) 6 d) 8 c) 10 18. Calculate the lattice enthalpy of MX(s) erystal. Hydration enthalpies: M+=276kJ/mol,X=363kJ/mol,MX(s)=89kJ/mol 2) 452kJ/mol (b) 550kJ/mol c) 639kJ/mol d) 728kJ/mol e) 365kJ/mol