139 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26IN0952 · The number of lone pair(s) of electrons on the central atom in [BrF4 ]-, XeF6 and [SbCl6 ]-are respectively · Chemical Bonding – General
ABC26IN0953 · The ground state electronic configuration of C2, using all electron is · Chemical Bonding – General
ABC26IN1063 · The term symbol for the first excited state of Be with the electronic configuration 1s22s13s1 is. · Electron Transfer Redox
ABC26IN1064 · The oxidizing power of [CrO4 ]2-, [MnO4 ]2- and [FeO4 ]2- follows the order · Coordination Chemistry – General
ABC26IN1065 · Using crystal field theory, identify from the following complex ions that shows same (spin only) values (A) [CoF6 ]3- (B) [IrCl6 ]3- (C)… · Crystal Field Theory
ABC26IN1066 · The correct statement for Mn-O bond lengths in [Mn (H2 O )6 ]2+, is · Coordination Chemistry – General
ABC26IN1067 · Identify the complex ions in sequential order when ferroin is used as an indicator in the titration of iron(II) with potassium dichromate… · Coordination Chemistry – General
ABC26IN1068 · The formation constant for the complexation of M+(M=Li, Na, K and Cs) with cryptand, C222 follows the order · Coordination Chemistry – General
ABC26IN1069 · [MnO4 ]-is deep purple in colour whereas [ReO4 ]-is colourless. This is due to greater energy required for · Charge Transfer Spectra
ABC26IN1070 · The correct statement about the substitution reaction of [Co(CN)5Cl ]3- with OH- to give [Co(CN)5(OH) ]3- is, · Reaction Mechanisms Substitution
ABC26IN1071 · Aqueous Cr2+ effects one electron reduction of [Co (NH3 )5 Cl ]2+ giving compound Y. Compound Y undergoes rapid hydrolysis. Y is, · Electron Transfer Redox
ABC26IN1072 · Choose the correct statements about Tanabe-Sugano diagrams · Molecular Orbital Ligand Field
ABC26IN1073 · Three electronic transitions at 14900, 22700 and 34400\ cm-1 are observed in the absorption spectrum of [CrF6 ]3-, The 0 value (in cm-1)… · Electron Transfer Redox
ABC26IN1074 · Possible term symbol(s) of the excited states of Na atom with the electronic configuration [1s22s22p63p1] is/are · Electron Transfer Redox
ABC26IN1075 · The symmetry-allowed atomic transition among the following is · Coordination Chemistry – General
ABC26IN1213 · The metallic radii are abnormally high for which of the following pairs? · Lanthanides & Actinides – General
ABC26IN1214 · Which of the following statements are TRUE for the lanthanides? arrayl (A) the observed magnetic moment of Eu at room temperature is higher… · Lanthanides & Actinides – General
ABC26IN1283 · The order of increasing Bronsted acidity for boron hydrides is · Hydrides
ABC26IN1284 · The ring size and the number of linked tetrahedral present in [Si6O18 ]12- are, respectively · Ring Cage Cluster
ABC26IN1285 · Consider the following reaction : N3P3Cl6 + 6\,HNMe2 N3P3Cl3(NMe2)3 + 3\,Me2NH.HCl (A) The number of possible isomers for [A] is · Main Group Elements – General
ABC26IN1286 · The reaction of BCl3, with NH4Cl gives product A which upon reduction by NaBH4 gives product B. Product B upon reacting with HCl affords… · Main Group Elements – General
ABC26IN1287 · Protonated form of ZSM-5 catalyzes the reaction of ethene with benzene to produce ethylbenzene. The correct statement for this catalytic… · Main Group Elements – General
ABC26IN1333 · Spin motion of which of the following gives magnetic moment · Nuclear Chemistry – General
ABC26IN1334 · Identify radioactive capture from the following nuclear reactions: · Nuclear Reactions Q Value
ABC26IN1423 · The W-W bond order in [W (5-C5 H5 )( mu -Cl)(CO)2 ]2 is · Organometallic Compounds – General
ABC26IN1424 · For the reaction of [Fe (5-C5 H5 ) (CH3 )(CO)2 ] with PMe3, the main intermediate is · Organometallic Compounds – General
ABC26IN1425 · [(eta3-mathrmC3H5)mathrmMn(CO)4] shows fluxional behavior. The 1mathrmH NMR spectrum of this compound when it is in the non-fluxional state… · Cluster Compounds Wade Rules
ABC26IN1426 · Using Wade's rules predict the structure type of [C2 B5 H7 ] · Cluster Compounds Wade Rules
ABC26IN1427 · For uranocene, the correct statement(s) is/are · Organometallic Compounds – General
ABC26IN1428 · The final products of the reaction of carbonyl metalates [V(CO)6 ]- and [Co(CO)4 ]- with H3 PO4 respectively, are · Metal Carbonyls
ABC26IN1429 · The number of valence electrons provided by [Ru(CO)3 ] fragment towards cluster bonding is · 18 Electron Rule
ABC26IN1430 · The intermediate and the final major product of photolysis of Z (Z) From the following are (A) (B) (C) (D) · Organometallic Compounds – General
ABC26IN1431 · Reaction of [Mn2(CO)10 ], with I2, results in A without loss of CO. Compound A, on heating of 120 C loses a CO ligand to give B , which… · Cluster Compounds Wade Rules
ABC26IN1432 · The approximate positions of vco bands (cm-1 ) in the solid-state infrared spectrum and the Fe-Fe bond order in [Fe (5-C5 H5 )( mu -CO)(CO)… · Cluster Compounds Wade Rules
ABC26IN1433 · Identify the species, those obey the 18 electron rule, from the following: (A) (B) (C) (D) · 18 Electron Rule
ABC26IN1434 · The following transformation is an example of · Oxidative Addition Reductive Elimination
ABC26IN1435 · CpM [Cp . is . (5-C5 H5 ) ] fragment isolobal with a BH fragment is · Organometallic Compounds – General
ABC26IN1436 · The number of metal-metal bonds in [Co2 Fe2(CO)11 (4-PPh )2 ] is · Metal Carbonyls
ABC26IN1437 · Choose the correct option for carbonyl fluoride with respect to bond angle and bond length · Organometallic Compounds – General
ABC26IN1438 · Correct order of M-C bond length of metallocenes (a-c) · Metallocenes Cp Arene
ABC26IN1439 · The 1H NMR spectrum of [Ru (4-C8 H8 )(CO)3 ] at 23 consists of a sharp single line. The number of signals observed at low temperature… · Organometallic Compounds – General
ABC26IN1440 · The numbers of skeletal electrons present in the compounds C2 B3 H5, C2 B4 H6, and B5 H9 are, respectively · Cluster Compounds Wade Rules
ABC26IN1441 · For fluxional Fe(CO)5 (structure given below) in solution, the exchange of numbered CO groups will be between 14 · Cluster Compounds Wade Rules
ABC26IN1442 · In the following reaction sequence arrayl HNEt2+CS2 KOH P aq. soln R \\ I2 [CpMo(CO)3]2 S array Where dtc = dithiocarbamate and tds =… · Organometallic Compounds – General
ABC26IN1443 · Reaction of Cr(CO)6 with LiC6H5 gives A which reacts with [MeO][BF] to give B. The structures of A and B respectively, are · Organometallic Compounds – General
ABC26IN1444 · Heating a sample of [ (5-C5 H5 ) Mo(CO)3 ]2 results in the formation of [ (5-C5 H5 ) Mo(CO)2 ] with elimination of 2 equivalents of CO. The… · Oxidative Addition Reductive Elimination
ABC26IN1445 · A plausible intermediate involved in the self metathesis reaction of C5H5-C C-C6H4-p\ Me catalyzed by [(tBuO)3W C-tBu] is · Cluster Compounds Wade Rules
ABC26OR0976 · The structure of the compounds that matches the 1H ~ NMR data given below is 1 H ~ NMR ~ DMSO-d6: delta 7.75 dd, J=8 . 8 , 2 . 4 Hz, 1H, 7… · Combined Structure Elucidation
ABC26OR0977 · Correctly matched structure and carbonyl stretching frequency set is COLUMN - A COLUMN -B (P) (X) 1750 cm-1 (Q) (Y) 1770 cm-1 (R) (Z) 1800… · IR
ABC26OR0978 · The number of chemical shift non-equivalent protons expected in 1H ~ N M R spectrum of alpha - pinene is alpha -pinene · NMR 1H