197 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26IN0980 · Consider the following statements for Allred-Rochow electronegativity (AR): (i) AR is directly proportional to Z_ eff (ii) AR is inversely… · Chemical Bonding – General
ABC26IN0981 · The total bond order between adjacent carbon atoms of benzene is · Chemical Bonding – General
ABC26IN1193 · For an a an octahedral Cu2+ complex depicting axial EPR spectrum (g), the geometry of Cu and the orbital containing the unpaired electron… · Inorganic Spectroscopy – General
ABC26IN1194 · For the complex shown below in non-fluxional state, the expected 31 P \ 1 H \ NMR resonance(s) is/are [ 31 P=I=1 / 2 ] · Inorganic Spectroscopy – General
ABC26IN1195 · In Mossbauer spectrum of a sample containing iron recorded in the presence of a static magnetic field, the number of possible allowed… · Mossbauer
ABC26IN1225 · Pair of lanthanide ions which show significant deviation between the experimental and calculated magnetic moments, considering contribution… · Lanthanides & Actinides – General
ABC26IN1226 · The pair in which both actinides show +3 oxidation state only is · Lanthanides & Actinides – General
ABC26IN1227 · The correct match for column A with column B is : · Lanthanides & Actinides – General
ABC26IN1315 · The common heptacity observed for coordination of C60 to a metal center is · Main Group Elements – General
ABC26IN1316 · Match the items in Column I with those of Column II The correct match is. · Main Group Elements – General
ABC26IN1317 · Consider the following statements: (A) The highest oxidation state of Group 3 elements is more readily shown in their oxides than in… · Phosphazenes Sn Compounds
ABC26IN1318 · The correct statements for dithionite and dithionate anions from the following are (A) both have S-S bond (B) both are dianionic (C)… · Main Group Elements – General
ABC26IN1319 · Correct statement/s among the following with respect to ionization energy (IE) is/are (i) (IE1+IE2+IE3 ) for indium is more than that of… · Main Group Elements – General
ABC26IN1320 · The reason for significantly high solubility of AgClO4 in benzene than in alkane solvents is · Main Group Elements – General
ABC26IN1321 · Choose the correct statements for the Group 15 halides: (i) AsCl3 can form complexes of type [AsCl4 ]-in the presence of a chloride source… · Main Group Elements – General
ABC26IN1322 · The reaction of XeF6 with a limited amount of quartz gives compound A . Then on reaction with an equivalent amount of XeO3. A gives B. The… · Main Group Elements – General
ABC26IN1323 · The energies of interaction for (i) ion pair, (ii) ion-dipole, and (iii) dipole-dipole interactions are inversely proportional to · Main Group Elements – General
ABC26IN1328 · Identify from following the products of K-electron capture by the nucleus: (A) neutron (B) neutrino (C) positron Answer is · Nuclear Chemistry – General
ABC26IN1490 · The expected number of co bands in the IR spectra of fac- [Mo (PPh3 )2(CO)3 ] and trans- [Mo(PPh3)2(CO)4 ] are, respectively · Organometallic Compounds – General
ABC26IN1491 · The most stable vanadium species in aqueous medium is · Organometallic Compounds – General
ABC26IN1492 · The correct order of metal-carbon distance is · Metal Carbonyls
ABC26IN1493 · The rate-determining step in the catalytic synthesis of acetic acid by Monsanto process is · Oxidative Addition Reductive Elimination
ABC26IN1494 · The cluster types of [Fe5(CO)14 N ]-and [Co6(CO)13 N ]-are, respectively, · Cluster Compounds Wade Rules
ABC26IN1495 · The main product of nucleoplallic attack of H- on the complex ion given below is · Cluster Compounds Wade Rules
ABC26IN1496 · The order of rate of substitution of chloride by pyridine (in ethanol) in the following complexes is · Organometallic Compounds – General
ABC26IN1497 · Among the following complexes, the one showing the highest rate of substitution of a CO ligand on heating with one equivalent of PPh3 in… · Organometallic Compounds – General
ABC26IN1498 · The correct electronic configuration of frontier MO's of Mn (5-C5 Me5 ) is · 18 Electron Rule
ABC26IN1499 · On heating [Mo (N2 )2 (PMe2 Ph )4 ] and [ReCl (N2 ) (PMe2 Ph )4 ], the products formed are respectively · Organometallic Compounds – General
ABC26IN1500 · The geometry/shape of the Fe4 core of the cluster [Fe4 C(CO)12 ]2- is · Cluster Compounds Wade Rules
ABC26IN1501 · The product A of the following reaction is · Cluster Compounds Wade Rules
ABC26IN1502 · The number of peaks with relative intensities observed in the 1 H NMR spectra of [(Cp)2 Fe(CO)2 ] at +30 °C and - 80 °C in diethyl ether… · Organometallic Compounds – General
ABC26IN1503 · The infrared (IR) spectrum of the product A for the following reaction CO(g) A shows three STRONG bands at 1986, 1935 and 1601\,cm-1. The… · Cluster Compounds Wade Rules
ABC26OR1002 · In IR spectrum, recorded neat, a compound shows a strong and broad band at 3300\,cm-1. The band becomes sharp and shifts to 3600\,cm-1 when… · IR
ABC26OR1003 · The correct match of 13C NMR chemical shift values ( delta ppm) for pyridine is · NMR 1H
ABC26OR1004 · The frequency of O-H stretch occurs at 3600\,cm-1. The O-D stretch frequency (in cm-1) would be closest to · IR
ABC26OR1005 · The compound that shows peaks in the EI mass spectrum at m / z 121,105,77,44 is · Mass Spec
ABC26OR1006 · The structure of the compound which displays the following spectral data is IR = 1690, 1100\,cm-1 1H NMR: delta 2.8 (s, 3H), 3.8 (s, 3H)… · Combined Structure Elucidation
ABC26OR1007 · The natural product that gives a signal at 218 ppm in its 13 C NMR spectrum is · NMR 1H
ABC26OR1008 · The correct order of carbonyl stretching frequency of the given compounds is A B C · IR
ABC26OR1009 · The structure that exhibits the following spectral data is arrayl IR (): 1740\,cm-1 \\ 1H\ NMR: delta =0.9(t,3H), 1.6(sext,2H), 2.3(t,2H)… · Combined Structure Elucidation
ABC26OR1058 · The intermediate A and the major product B, formed in the following reaction are [A] Delta [B] · Pericyclic Reactions – General
ABC26OR1059 · The major product formed in the following reaction is: + · Pericyclic Reactions – General
ABC26OR1060 · The HOMO of pi -molecular orbitals of methylazide is · Frontier Orbital Analysis
ABC26OR1061 · The following transformation involves a series of + + · Electrocyclic
ABC26OR1085 · The major product formed in the following reaction is · Photocycloaddition
ABC26OR1086 · The major products A and B formed in the following reactions are A · Photocycloaddition
ABC26PH0874 · The molar residual entropy (in J / K ) for solid OCS is close to · Atomic And Molecular Term Symbols – General
ABC26PH0875 · A monoatomic perfect gas undergoes expansion from (p1, V1 ) to (p2, V2 ) under isothermal or adiabatic conditions. The pressure of the gas… · Atomic And Molecular Term Symbols – General
ABC26PH1021 · The cell potential (in V) of a Ag / AgCl / KCl electrode connected to the standard hydrogen electrodeat 298 K is closest to (Given E_ (AgCl… · Electrochemistry – General
ABC26PH1022 · In common glass electrode, alkaline error caused at pH>10 is least for · Electrochemistry – General