90 questions from this paper that are in the bank. Each opens with its answer and explanation.
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 eta 5-Cp group with nitric oxide is the easiest for · Organometallic Compounds – General
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
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. + 2NaCl · Oxidative Addition Reductive Elimination
ABC26OR0955 · In the IR spectrum of p-nitrophenyl acetate, the carbonyl absorption band appears at · IR
ABC26OR1023 · The following transformation involves + H+ · 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
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 [E_Fe3+/Fe2+o=0.75 V, E_Sn4+/Sn2+o=0.15 V; 2.303RT/F=0.06 V] · 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 phi 1 and phi 2 the following functions are constructed: A = phi 1 + phi 2, B = phi 1 + i phi 2, C = phi… · Quantum Chemistry – General
ABC26PH1227 · The trial wave function of a system is expanded as psi t=c1 phi 1+c2 phi 2. The matrix elements of the Hamiltonian are phi 1 H phi 1=0; phi… · Variation Method
ABC26PH1228 · One molecular orbital of a polar molecule AB has the form cA psi A + cB psi B, where psi A and psi B are normalized atomic orbital's… · Huckel MO Theory
ABC26PH1229 · Suppose, the ground stationary state of a harmonic oscillator with force constant 'k' is given by psi 0 = exp [-Ax2] Then, A should depend… · Harmonic Oscillator
ABC26PH1230 · The energy of a harmonic oscillator in its ground state is 1/2 h omega '. According to the virial theorem, the average kinetic (T) and… · Harmonic Oscillator
ABC26PH1233 · The difference in energy levels of n = 2 and n = 1 of a particle-in-a one dimensional box is 6 units of energy. In the same units, what is… · Quantum Chemistry – General
ABC26PH1328 · A metal crystallizes in fcc structure with a unit cell side of 500 pm. If the density of the crystal is 1.33 g/cc, the molar mass of the… · Crystal Systems Lattices
ABC26PH1329 · The packing fraction of a simple cubic lattice is close to · Close Packing
ABC26PH1330 · Crystal A diffracts from (111) and (200) planes but not from (110) plane, while the crystal B diffracts from (110) and (200) planes but not… · Crystal Systems Lattices
ABC26PH1377 · The rotational partition function of H2 is : · Partition Functions
ABC26PH1456 · For water, Delta Hvap ≈ 41 kJ mol-1. The molar entropy of vaporization at 1 atm pressure is approximately · Laws State Functions
ABC26PH1457 · A carnot takes up 90 J of heat from the source kept at 300K. The correct statement among the following is · Thermodynamics – General
ABC26PH1459 · The internal pressure (∂ U/∂ V)T of a real gas is related to the compressibility factor Z = pV/RT by [where, V is the molar volume] · Thermodynamics – General