116 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26IN0933 · When a hydrogen atom is placed in an electric field along the y-axis, the orbital that mixes most with the ground state 1s orbital is · Hydrogen Bonding Weak Interactions
ABC26IN1010 · In [Mo2 (S2 )6 ]2-, cluster the number of bridging S22- and coordination number of Mo respectively, are · Coordination Chemistry – General
ABC26IN1011 · The light pink color of [Co (H2 O )6 ]2+ and the deep blue color of [CoCl4 ]2- are due to · Coordination Chemistry – General
ABC26IN1012 · The number of possible isomers of [Ru (PPh3 )2(acac)2 ](acac= acetylacetonate ) is: · Coordination Chemistry – General
ABC26IN1013 · The total number of Cu-O bonds present in the crystalline copper(II) acetate monohydrate is: · Crystal Field Theory
ABC26IN1014 · The electric dipole allowed transition in a d2 atomic system is · Coordination Chemistry – General
ABC26IN1015 · Coordination number of " C " in Be2 C3 whose structure is correlated with that of CaF2 is: · Coordination Chemistry – General
ABC26IN1016 · In the solid state, the CuCl5 ion has two types of bonds. These are · Coordination Chemistry – General
ABC26IN1017 · The correct spinel structure of Co3 O4 is: · Coordination Chemistry – General
ABC26IN1018 · The platinum complex of NH3 and Cl- ligands is an anti-tumour agent. The correct isomeric formula of the complex and its precursor are: · Molecular Orbital Ligand Field
ABC26IN1019 · One of the excited states of Ti has the electric configuration [Ar] 4 s2 3 d1 4 p1. The number of microstates with zero total spin (S) for… · Coordination Chemistry – General
ABC26IN1020 · The rate of exchange of OH2 present in the coordination sphere by 18OH2 of, (i) [Cu (OH2 )6 ]2+ (ii) [Mn (OH2 )6 ]2+ (iii) [Fe (OH2 ) ]62+… · Coordination Chemistry – General
ABC26IN1162 · The number of lines exhibited by a high resolution EPR spectrum of the species, [Cu( ethylenediamine )2 ]2+ is [Nuclear spin (I) of Cu=3 /… · Inorganic Spectroscopy – General
ABC26IN1163 · The recoil energy of a Mossabauer nuclide of mass 139 amu is 2.5 MeV. The energy emitted by the nucleus in keV is: · Inorganic Spectroscopy – General
ABC26IN1164 · Find out the number of lines in the 31 P NMR signal for diagram · Inorganic Spectroscopy – General
ABC26IN1203 · Which one of the following shows the highest solubility in hot concentrated aqueous NaOH ? · Lanthanides & Actinides – General
ABC26IN1204 · Consider the ions Eu(III), Gd(III), Sm(II) and Lu(III). The observed and calculated magnetic moment values are closest for the pair · Lanthanides & Actinides – General
ABC26IN1246 · For the deposition of Pb by electroplating, the best suited compound among the following is · Main Group Elements – General
ABC26IN1247 · The electronegativity differences is the highest for the pair · Main Group Elements – General
ABC26IN1248 · Structure of a carborane with formula, C2 B4 H8, is formally derived from · Main Group Elements – General
ABC26IN1249 · Boric acid is a weak acid in aqueous solution. But its acidity increases significantly in the presence of ethylene glycol, because · Main Group Elements – General
ABC26IN1250 · Silicates with continuous 3D frame work are · Silicates Silicones
ABC26IN1365 · The substitution of 5-Cp group with nitric oxide is the easiest for · Organometallic Compounds – General
ABC26IN1366 · The molecule 3 Follow 18 electron rule. The two ' M ' satisfying the condition are · 18 Electron Rule
ABC26IN1367 · Complexes of general formula, fac- [Mo(CO)3(phosphite)3 ] have the C-O stretching bands given below. Phosphines: PF3(A) ; PCl3(B)… · Organometallic Compounds – General
ABC26IN1368 · In the cluster [Co3(CH)(CO)9 ] obeying 18e rule, the number of metal-metal bonds and the bridging ligands respectively, are · Cluster Compounds Wade Rules
ABC26IN1369 · Consider the catalyst in column-I and reaction in column-II 4 The best match of a catalyst of column-I with the reaction nuclear column-II… · Cluster Compounds Wade Rules
ABC26IN1370 · Consider the following reaction mechanism The steps A, B and C, respectively, are · Oxidative Addition Reductive Elimination
ABC26IN1371 · Which one of the following will NOT undergo oxidative addition by methyl iodide? · Oxidative Addition Reductive Elimination
ABC26IN1372 · In hydrofomylation reaction using [Rh (PPh3 )2(CO)(H) ] as the catalyst, addition of excess PPh3, would · Oxidative Addition Reductive Elimination
ABC26IN1373 · Reactions A and B are, termed as respectively. · Oxidative Addition Reductive Elimination
ABC26OR0954 · In the 1 H NMR spectrum recorded at 293 K , an organic compound (H7 NO ), exhibited signals at delta 7 . 8(1H, s), 2 . 8(3H, s) and 2… · NMR 1H
ABC26OR0955 · In the IR spectrum of p-nitrophenyl acetate, the carbonyl absorption band appears at · IR
ABC26OR0956 · An organic compound (C9 H10 O3 ) exhibited the following spectral data: IR: 3400 , 1680 ~ c m- 1 ; 1 H ~ NMR: delta 7.8(1H, d, J=8 Hz), 7… · Combined Structure Elucidation
ABC26OR1022 · In the following sequence of pericyclic reactions X and Y are · Pericyclic Reactions – General
ABC26OR1023 · The following transformation involves · Sigmatropic Shifts
ABC26OR1071 · The following photochemical transformation proceeds through · Photocycloaddition
ABC26PH0893 · If the concept of half-life is generalized to quarter-life of a first order chemical reaction, it will be equal to · Rate Laws Order
ABC26PH0894 · The activation energy for the bimolecular reaction A+BC AB+C is E0 in the gas phase. If the reaction is carried out in a confined volume of… · Arrhenius Activation
ABC26PH0895 · The decomposition of NH3 on Mo surface follows Langmuir-Hinshelwood mechanism. The decomposition was carried out at low pressures. The… · Rate Laws Order
ABC26PH0957 · The correlation coefficient between two arbitrary variables x and y is zero, if · Regression Fitting
ABC26PH0978 · The Daniel cell is · Electrochemistry – General
ABC26PH0979 · Kohlrausch's law is applicable to a dilute solution of · Conductance
ABC26PH0980 · The equilibrium constant for an electrochemical reaction, is [ left[E_Fe3+/Fe2+o=0.75,mathrmV, E_Sn4+/Sn2+o=0.15,mathrmV… · Electrochemistry – General
ABC26PH0981 · The potential in Debye-Huckel theory is proportional to · Debye Huckel
ABC26PH1104 · The absorption spectrum of O2 shows a vibrational structure that becomes continuum at 56875 cm-1. At the continuum, it dissociates into one… · Molecular Spectroscopy – General
ABC26PH1105 · The vibrational frequency and anharmonicity constant of an alkali halide are 300 cm-1 and 0.0025 respectively. The positions (in cm-1 ) of… · Vibrational
ABC26PH1224 · If A and B are non-commuting Hermitian operators, all eigenvalues of the operator given by the commutator [A, B] are · Postulates Operators
ABC26PH1225 · The value of commutator [x, px2 ] is given by · Postulates Operators
ABC26PH1226 · Combining two real wave functions 1 and 2 the following functions are constructed: A=1+2, B=1+i 2, C=1-i 2, D=i (1+2 ) The correct… · Quantum Chemistry – General