Question

Scenario K echnology commonly focuses on the study of matter on the scale of 1 to 100 nanometers. The properties of mater on the Nanotechnology Nascale can be quite different from its macroscopic properties. For example, gold is considered to be fairly inct macroscopically. an effective catalyst on the nanoscale. Nanoparticulate gold is used in DNA detection probes, in biomedical optical imaging and in the treatment of breast cancer and Alzheimer's disease What is the ground state electron configuration of an elemental gold atom? (A) [Xe] 6% sd" 5p' 414 (It) [Xe] 6s' sdl 44 (C) [Xe] 6s 540 41 (D) [Xe] 6" sd10 4 14 43. The nanoscale typically ranges from 1 to 100 nm. This range can be reported as (A) 10 "to 10 cm. (B) 10 to 10 m (C) 10 to 10pm. (D) 10 to 10" m. 42. Gold nanoparticles having a size of about 5 nm can be prepared by reduction of auric acid, HAucu. In physiological solutions the conjugate base of HAUCI, has the structure shown. The point group of [AuCl is (A) C (B) CC (C) Da (D) T. 44. In contrast to the characteristic color of macroscopic gold, colloidal gold suspensions consisting of nanom sized gold particles in a liquid medium may exhibit blue colors. In one cancer treatment gold nanopartic are selectively attached to cancerous cells, then irrad with an argon laser with the subsequent reemission energy as heat, which kills the cancerous cells. The absorbed radiation occurs in the region the reemitted radiation occurs in the of the electromagnetic radiation spectrum (A) infrared, visible (B) ultraviolet, infr (C) visible, infrared (D) visible, ultravi Scenario Pi/NH.),Cl, is an effective chemotherapy drug used to treat specific forms of cancer. This drug is formed by the reaction K PLC, + 2NH4+ PNH) C1, +2KCI The product has a zero magnetic moment and a non-zero dipole moment. 45. If 415.3 g of K PtCl, are reacted with 17.0 g of NHs, the limiting reactant is and the theoretical yield (A) K PtCl: 300 g of Pt(NH),CI; (B) K,PICI: 150 g of Pt(NH),CI: (C) NH4; 300 g of PI(NH) Cl2 (D) NH,: 150 g of Pt(NH),CI: 46. The ligand(s) present in the products isare) (A) only cr (B) only NH (C) Cr and NH (D) K, Cl, and NH 48. A similar compound that is not effective as an ar drug is Pt(H NCH.CH NHCl. Of these two compounds (A) P (H NCH,CH NH, CI, is more stable pri due to the chelate effect. (B) Pt(HANCH.CH.NH, CI, is less stable due strain in the complexed H,NCH.CH NH (C) Pt(H NCHCH NHCl, is more stable pa due to HANCHCH NH, being a stronger than NH, (D) P (HANCH.CH NHCl, is less stable be are only three donor atoms compared to atoms in Pt(NH),CI, 47. This product is (A) cis-square planar. (C) see-saw. (B) trans-square planar. (D) tetrahedral tens Institute

Answer 1

اعار Symmetry elements, Ans. Scenario-tel. . Ground state electron configuration of elemental gold atom iset s(${xe 6s' saº " 22 ghe point Aruly is - Dunl ala cu, 4G1 C4, 465, c lu on on De Symmetrey elements. Scenario-y]: Ptcly +211H3 → PECAH3)2 +2kce. Mocot: = 415017 Mirt-349 Micot = 3009, --- - 34g of NH3 reacts with 415.00y of ks ptcly 179 of NH3 reacts with 415009 x17 - 207.59 of top cher That means Aptely is in excess h NH₂ is Kime ting reapert: noo, zug of NH3 forms 3oog of Pt (NH3)24 179 2 xHz forms 150g of Pt CNH/22 So, option (D) is correct. HO option CC) is correct She product used in chemotherapy is 'cis- square planar of Pt (NH3)2 cl