113 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26IN1057 · In transition metal phosphine (M-PR3 ) complexes, the back-bonding involves donation of electrons from · Electron Transfer Redox
ABC26IN1058 · The electric-dipole allowed transition among the following is · Coordination Chemistry – General
ABC26IN1059 · The lowest energy-state of an atom with electronic configuration ns1np1 has the term symbol · Electron Transfer Redox
ABC26IN1060 · Match the complexes given in column I with the electronic transitions (mainly responsible for their colours) listed in column II The… · Electron Transfer Redox
ABC26IN1061 · Among the complexes, (A) K4 [Cr(CN)6 ], K4 [Fe(CN)6 ], (C) K3 [Co(CN)6 ], (D) K4 [Mn(CN)6 ], and Jahn-Teller distortion is expected in · Jahn Teller
ABC26IN1062 · The complex [Fe(phen)2(NCS)2 ] (phen 1,10-phenanthroline) shows spin cross-over behaviour CFSE and at 250 and 150K, respectively are · Coordination Chemistry – General
ABC26IN1175 · The 119Sn NMR chemical shift (approximately in ppm) corresponding to (5-Cp)2Sn (relative to Me4Sn) is · Inorganic Spectroscopy – General
ABC26IN1176 · The reduced form of a metal ion M in a complex is NMR active. On oxidation, the complex gives an EPR signal with g=2.2 and g=2.0. Mossbauer… · Mossbauer
ABC26IN1177 · Mössbauer spectrum of a metal complex gives information about · Inorganic Spectroscopy – General
ABC26IN1211 · Consider the following statements with respect to uranium arrayl (A) UO2+ disproportionates more easily than UO22+ \\ (B) U3O8 is its most… · Lanthanides & Actinides – General
ABC26IN1212 · Consider the following statements for (NH4 )2 [Ce (NO3 )6 ](Z) · Lanthanides & Actinides – General
ABC26IN1279 · All forms of phosphorus upon melting, exist as · Main Group Elements – General
ABC26IN1280 · The correct set of pseudo halide anions is · Main Group Elements – General
ABC26IN1281 · The oxoacid of phosphorus having P atoms in +4,+3, and +4 oxidation states respectively, is · Main Group Elements – General
ABC26IN1282 · Considering the inert pair effect on lead, the most probable structure of PbR2 [R = 2,6-C6H3(2,6-Pri2C6H3)2] is · Ring Cage Cluster
ABC26IN1408 · The binding modes of NO in 18 electron compounds [Co(CO)3(NO)] and [Ni(5-Cp)(NO)], respectively, are · Cluster Compounds Wade Rules
ABC26IN1409 · The role of copper salt as co-catalyst in Wacker process is · Organometallic Compounds – General
ABC26IN1410 · For typical Fischer and Schrock carbenes, consider the following statements arrayl A. Oxidation state of metal is low in Fischer carbene… · Carbene Carbyne
ABC26IN1411 · The refluxing of RhCl3 .3 H2 O with an excess of PPh3, in ethanol gives a complex A. Complex A and the valence electron count on rhodium… · 18 Electron Rule
ABC26IN1412 · The beta -hydrogen elimination will be facile in · Oxidative Addition Reductive Elimination
ABC26IN1413 · The reaction [Co(CN)5 H2 O ]2-+X- [Co(CN)5 X ]2-+H2 O follows a/an · Cluster Compounds Wade Rules
ABC26IN1414 · According to Wade's theory the anion [B12 H12 ]2- adopts · Cluster Compounds Wade Rules
ABC26IN1415 · The reaction of SbCl3, with 3 equivalents of EtMgBr yields compound X . Two equivalents of SbI3 react with one equivalent of X to give Y… · Cluster Compounds Wade Rules
ABC26IN1416 · The following statements are given regarding the agostic interaction C-H----Ir observed in [Ir (Ph3 P )3 Cl ]. arrayl (A) Upfield shift of… · Organometallic Compounds – General
ABC26IN1417 · Match column A (coupling reactions) with column B (reagents) The correct match is: · Organometallic Compounds – General
ABC26IN1419 · Total number of vertices in metal clusters [Ru6(C)(CO)17 ] [Os5(C)(CO)15 ] and [Ru5(C)(CO)16 ] are 6,5 and 5, respectively. The predicted… · Cluster Compounds Wade Rules
ABC26IN1420 · The reductive elimination of Ar-R (coupled product) from A is facile when · Oxidative Addition Reductive Elimination
ABC26IN1421 · The least probable product from A on reductive elimination is A · Oxidative Addition Reductive Elimination
ABC26IN1422 · With respect to sigma and pi bonding in Pt III in the structure given below, which of the following represent the correct bonding diagram · Organometallic Compounds – General
ABC26OR0972 · The 1 H ~ NMR spectrum of a dilute solution of a mixture of acetone and dichloromethane in CDCl3 exhibits two singlet of 1: 1 intensity… · NMR 1H
ABC26OR0973 · Intense band generally observed for a carbonyl group in the IR spectrum is due to · IR
ABC26OR0974 · Number of signals in the 13 C \1 H \ NMR spectrum of (R)-4-methylpentan- 2-ol are · NMR 13C
ABC26OR0975 · An organic compounds shows following spectral data: IR ( cm-1 ): 1680 1 H NMR (CDCl3 ): delta 7.66(m, 1 H), 7.60(m, 1 H), 7.10(m, 1 H)… · Combined Structure Elucidation
ABC26OR1037 · The major product formed in the following reaction is · Pericyclic Reactions – General
ABC26PH0917 · The temperature-dependence of a reaction is given by k=AT2 (-E0 / RT ) The activation energy Ea of the reaction is given by: · Arrhenius Activation
ABC26PH0918 · For a reaction, 2 A+B 3 Z, if the rate of consumption of A is 2 10-4 mol dm-3 s-1 the rate of formation of Z (in mol dm-3 s-1 ) will be · Chemical Kinetics – General
ABC26PH0919 · For a given ionic strength, (I) rate of reaction is given by kk0=-4 0.51 I1 / 2. Which of the following reactions follows the above… · Chemical Kinetics – General
ABC26PH0920 · The intensity of a light beam decreases by 50\% when it passes through a sample of 1.0 cm path length. The percentage of transmission of… · Chemical Kinetics – General
ABC26PH0921 · Considering the following parameters with reference to the fluorescence of a solution: 1. Molar absorptivity of fluorescent molecule. 2… · Chemical Kinetics – General
ABC26PH0922 · According to transition state theory, the temperature-dependence of pre-exponential factor (A) for a reaction between a linear and a… · Arrhenius Activation
ABC26PH0923 · In a photochemical reaction, radicals formed according to the equation arrayl C4 H10+hv 2 C2 H5 \\ C2 H5+C2 H5 k2 C2 H6+C2 H4 array If I is… · Chemical Kinetics – General
ABC26PH0924 · For the following reaction, A k-1k1 2 B ; B k2 C (d[B])/dt is given by · Chemical Kinetics – General
ABC26PH0953 · If y2=4 x and 0.1 \% error is incurred for x , the percentage error involved in y will be · Error Propagation
ABC26PH0962 · In a conductometric experiment for estimation of acid dissociation constant of acetic acid, the following values were obtained in four sets… · Data Analysis – General
ABC26PH0995 · The correct Delta G for the cell reaction involving steps arrayl Zn(s) Zn2+(aq) + 2e \\ Cu2+(aq) + 2e Cu(s) array · Nernst Cells
ABC26PH0996 · The temperature-dependence of an electrochemical cell potential is · Electrochemistry – General
ABC26PH0997 · Conductometric titration of a strong acid with a strong alkali (MOH) shows linear fall of conductance up to neutralization point because of · Conductance
ABC26PH1115 · The symmetric rotor among the following is · Molecular Spectroscopy – General
ABC26PH1116 · The nuclear g-factors of 1 H and 14 N are 5.6 and 0.40 respectively. If the magnetic field in an NMR spectrometer is set such that the… · Molecular Spectroscopy – General