143 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26IN0958 · The oxidation state of gold in the following complex is 5 · Hydrogen Bonding Weak Interactions
ABC26IN0959 · The numbers of triangular faces in square antiprism, icosahedron and tricapped trigonal prism (capped on square faces), respectively, are · Chemical Bonding – General
ABC26IN1076 · [NiII L6]n+ or n- shows absorption bands at 8500, 15400, and 26000 cm-1 whereas [NiII L'6]n+ or n- at 10750, 17500 and 28200 cm-1. L and L'… · Coordination Chemistry – General
ABC26IN1077 · The number of microstates present in 3F-term is · Term Symbols Spectra
ABC26IN1078 · Chelate effect is · Stability Chelate Effect
ABC26IN1079 · The lowest energy term for the d6configuration is · Term Symbols Spectra
ABC26IN1080 · The first excited state of hydrogen molecule is · Coordination Chemistry – General
ABC26IN1081 · Complex [Cr(bipyridyl)3]3+, shows red phosphorescence due to transition · Coordination Chemistry – General
ABC26IN1082 · The complex that shows orbital contribution to the magnetic moment, is · Molecular Orbital Ligand Field
ABC26IN1083 · Paramagnetic susceptibility of the order of 10-6 cm3mol-1 observed for KMnO4 is due to- · Magnetism
ABC26IN1084 · The room temperature magnetic moment (in BM) for a monomeric Cu (II) complex is greater than 1.73. This may be explained using the… · Coordination Chemistry – General
ABC26IN1178 · Identify correct statements for the EPR spectrum of VO(acac)2 [with one pyramidal geometry at vanadium] at 77 K [I(51V)=7/2] (A) It has two… · Inorganic Spectroscopy – General
ABC26IN1179 · The numbers of lines shown by the BH3 part of the molecule Ph3 P. 11 BH3 in the 1 H and 11 B NMR spectra are, respectively [I (11 B)=3 / 2… · Electronic Spectra Tanabe Sugano
ABC26IN1180 · To record Mossbauer spectrum of Fe containing samples, a source 'X' is used. X after a nuclear transformation (Y), gives gamma -radiation… · Mossbauer
ABC26IN1215 · For monoionic complex [UO2(NO3)3]- the correct coordination number and geometry respectively, are · Lanthanides & Actinides – General
ABC26IN1216 · The g values for Ce3+ (4f1) and Pr3+ (4f2) are, respectively · Lanthanides & Actinides – General
ABC26IN1288 · The numbers of P-S and P-P bonds in the compound P4 S3 are, respectively · Main Group Elements – General
ABC26IN1289 · The compound which dissolves in POCl3 to give a solution with highest chloride ion concentration, is · Main Group Elements – General
ABC26OR0980 · In the 1 H NMR spectrum of myrtenal, the two methyl groups are expected to display signals at (chemical shift values delta in ppm) myrtenal · NMR 1H
ABC26OR0981 · A compound displays the following spectral data. The correct structure of the compound is IR: 1690 ~ cm -1. 1 H NMR: delta 2.5(s, 3H)… · Combined Structure Elucidation
ABC26OR1042 · The frontier orbital interactions involved in the formation of the carbocation intermediate in the reaction of isobutylene with HCl are · Frontier Orbital Analysis
ABC26OR1043 · The following transformation proceeds through two consecutive electrocyclic processes, which are · Electrocyclic
ABC26OR1044 · The correct match for the reactions P-S with the names of cyclizations I-IV is Reactions: (P) (Q) (R) (S) Name of Cyclizations: (I)… · Pericyclic Reactions – General
ABC26OR1045 · The major products A and B formed in the following reaction sequence are + heat (A) h nu (B) · Pericyclic Reactions – General
ABC26OR1078 · The correct match for the following transformations P-S with the processes I-IV is Reactions: (P) (Q) (R) (S) Processes: (I) Diels-Alder… · Photocycloaddition
ABC26PH0930 · Experimentally determined rate law for the chemical reaction, 2 NO2 F → 2 NO2+F2 is R=k [NO2 F] The rate determining step consistent with… · Rate Laws Order
ABC26PH0931 · For the chemical reaction in aqueous solution, CH2 ClCOO-+OH- → CH2 OHCOO-+Cl- the correct statement is · Rate Laws Order
ABC26PH0932 · If experimentally observed rate constant is greater than the maximum value of rate constant obtained using hard-sphere model of collision… · Rate Laws Order
ABC26PH0933 · Half-life t1 / 2 for a third order reaction 3C → products, where C0 is the initial concentration of C, will be · Rate Laws Order
ABC26PH0963 · In a titration, the percentage uncertainties in the measured aliquot volume and the measured titre volume are ± x and ± y respectively. The… · Data Analysis – General
ABC26PH1002 · In a potentiometric titration, the end point is characterised by · Electrochemistry – General
ABC26PH1004 · The standard electrode potential E0 at a fixed temperature and in a given medium is dependent on · Nernst Cells
ABC26PH1005 · Two aqueous 1:1 electrolyte systems A and B are at different temperatures TA and TB and CA and CB concentrations, respectively. Their Debye… · Debye Huckel
ABC26PH1123 · In an NMR spectrometer containing a 2.5 T magnet, Larmor precession frequency of 1 H is 100 MHz. The radiofrequency used in this… · NMR ESR Physical
ABC26PH1124 · Upon application of a weak magnetic field, a line in the microwave absorption spectrum of rigid rotor splits into 3 lines. The quantum… · Molecular Spectroscopy – General
ABC26PH1187 · The condensation of hydroxy acid produces a polyster with the probability of linkage at both ends being p. The mole fraction of k-mer chain… · Polymer Chemistry – General
ABC26PH1203 · The Hermitian conjugate of operator d / dx, called (d / dx), is actually equal to · Quantum Chemistry – General
ABC26PH1277 · The eigenfunctions of the Hamiltonian H(H=T+V) of a harmonic oscillator are (where T and V are kinetic energy and potential energy… · Postulates Operators
ABC26PH1278 · For a particle of mass m confined in a rectangular box with sides 2 a and a, the energy and degeneracy of the first excited state… · Quantum Chemistry – General
ABC26PH1279 · Choosing some Hamiltonian H and an orthonormal basis, a linear variation is carried out to get approximately energies Ej With 2 basis… · Variation Method
ABC26PH1280 · Average value of momentum for the ground state of a particle in a 1-d box is zero because · Particle In A Box
ABC26PH1281 · For a hermitian operator A, which does NOT commute with the Hamiltonian H, let psi 1 be an eigenfunction of A and psi 2 be an eigenfunction… · Postulates Operators
ABC26PH1282 · The simultaneous eigen functions of angular momentum operators L2 and LZ are · Angular Momentum
ABC26PH1283 · The ionization energy of hydrogen atom in its ground state is approximately 13.6 eV. The potential energy of He+, in its ground state is… · Hydrogen Atom
ABC26PH1284 · In simple molecular orbital theory of hydrogen molecule, bonding sigma g and anti-bonding sigma u molecular orbitals are constructed as… · Hydrogen Atom
ABC26PH1285 · The correct normalized wave function for one of the sp2 hybrid orbitals is · Hydrogen Atom
ABC26PH1286 · The orbital degeneracy of the level of a one-electron atomic system with Z=5 and energy =-13.6 eV, is · Hydrogen Atom
ABC26PH1287 · If we write a normalized wave function psi =A, then phi is also normalized when · Postulates Operators
ABC26PH1288 · The ground state of a certain system with energy epsilon 0, is subjected to a perturbation V, yielding a first order correction epsilon 1… · Perturbation Theory