97 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26IN1218 · The calculated and observed magnetic moments (in B.M.) of aqua complex of a lanthanide ion are 0 and ~3.5, respectively. The lanthanide ion… · Lanthanides & Actinides – General
ABC26IN1294 · Both potassium and sulfuric acid form intercalation compounds with graphite. The graphite layers are · Phosphazenes Sn Compounds
ABC26IN1295 · Addition of two electrons to the bismuth cluster Bi53+ results in a change of structure type from · Ring Cage Cluster
ABC26IN1296 · The compound N2 F2 has two isomers. Choose the correct option from the following: · Main Group Elements – General
ABC26IN1331 · Choose the correct statement for magnitude of threshold energy of an endoergic nuclear reaction between stationary nucleus and a moving… · Nuclear Reactions Q Value
ABC26IN1332 · Consider following statements for fission of U235 with thermal neutrons. A. The % of nuclei undergoing unsymmetrical fission is maximum. B… · Fission Fusion
ABC26IN1454 · Treatment of Fe(CO)5 with 1,3-butadiene gives B that shows two signals in its 1H NMR spectrum. B on treatment with HCl yields C which shows… · Organometallic Compounds – General
ABC26IN1455 · Choose the isoelectronic pair among the following: arrayll A. [V(CO)6 ] & B. [Cu(5-C5H5)(CO) ] \\ C. [Co(CO)4 ]- & D. [IrCl(CO)(PPh3) ]… · 18 Electron Rule
ABC26IN1456 · An organometallic fragment that is isolobal to CH3 +is · Metal Carbonyls
ABC26IN1457 · Reaction of Na [Mn(CO)5 ] with H3 C=CHCH2 Cl gives A along with NaCl . Photolysis of compound A results in compound B together with… · Oxidative Addition Reductive Elimination
ABC26IN1458 · The number of bonding molecular orbitals and the number of available skeletal electrons in [B6 H6 ]2-, respectively, are: · 18 Electron Rule
ABC26IN1459 · Addition of NaBH4 to [ (5-Cp ) Fe (6-C6 H6 ) ]+will give · Oxidative Addition Reductive Elimination
ABC26IN1460 · The [Fe(S2CNEt2)3 ] changes with temperature with the involvement of two electronic states. The states are · 18 Electron Rule
ABC26IN1461 · Identify the product in the reaction between and CH3I going at room temperature via SN2 mechanism · Organometallic Compounds – General
ABC26OR0986 · 13 C NMR spectrum of DMSO- d6 gives a signal at delta 39.7 ppm as a · NMR 1H
ABC26OR0987 · The correct structure of the compound based on the following characteristic spectral data is IR: 1736 ~ c m-1 1 H ~ NMR: delta 3.59(s, 3… · Combined Structure Elucidation
ABC26OR1047 · Following reaction is an example of · Sigmatropic Shifts
ABC26OR1048 · Following reaction is an example of · Cycloaddition Diels Alder
ABC26OR1049 · Following reaction involves · Sigmatropic Shifts
ABC26OR1080 · The major product formed in the following reaction is: · Photocycloaddition
ABC26PH0939 · If the pre-exponential factor in Arrhenius equation is 1.6 1012 s-1, the value of the rate constant at extremely high temperature will be… · Arrhenius Activation
ABC26PH0940 · In kinetic study of a chemical reaction, slopes are drawn at different times in the plot of concentration of reactants versus time. The… · Chemical Kinetics – General
ABC26PH0941 · Photochemical decomposition of HI takes place with the following mechanism arrayl HI+hv (Ia ) H+I \\ H+HI k1 H2+I \\ I+I+M k2 I2+M array… · Chemical Kinetics – General
ABC26PH0942 · In a enzyme catalyzed reaction: E+S k-1k1 ES k2 E+P k2=3.42 104 s-1. If [E]0=1.0 10-2 mol dm-3, the magnitude of maximum velocity and… · Enzyme Kinetics
ABC26PH0943 · Arrhenius equations for two chemical reactions are: k1=A1 e^-E1 / RT, k2=A2 e^-E2 / RT. If E1>E2 then at a given temperature T · Arrhenius Activation
ABC26PH1010 · The electrochemical cell potential (E), after the reactants and products reach equilibrium, is (E0 . is the standard cell potential and n… · Electrochemistry – General
ABC26PH1011 · The specific conductance of a solution is 0.176\, Omega -1\,cm-1. If the cell constant is 0.255\,cm-1, the conductance ( Omega -1) of that… · Conductance
ABC26PH1012 · The standard cell potential for the reaction Zn(s)+Cu2+(aq) Zn2+(aq)+Cu(s) is +1.10 V . The Gibbs free energy change during the reaction is… · Electrochemistry – General
ABC26PH1013 · A solution of Fe3+ is titrated potentiometrically using Ce3+ solution at 25°C. The emf (in V) of the redox system thus formed when, (i) 50… · Nernst Cells
ABC26PH1014 · The standard cell potential of cell, Pt |H2(g) | HBr(aq)|AgBr(s)| Ag(s), was measured over a range of temperatures, and the data was fitted… · Electrochemistry – General
ABC26PH1131 · The v=0 to 1 vibration-rotation spectrum of a diatomic molecule exhibits transitions for R(0), R1, P(1) and P(2) lines at 2241,2254,2216… · Vibrational
ABC26PH1132 · For a certain magnetic field strength, a free proton spin transition occurs at 700 MHz . Keeping the magnetic field strength constant the… · Molecular Spectroscopy – General
ABC26PH1133 · The first electronic absorption band maximum of a polar and relatively rigid aromatic molecule appears at 310 nm but its fluorescence… · Raman
ABC26PH1189 · For a monodisperse polymer, the number-average molar mass (MN ) and weight-average molar mass (Mw ) are related according to · Polymer Chemistry – General
ABC26PH1190 · A polydisperse polymer sample has ten molecules of molar mass 20,000 g mol-1 and fifteen molecules of molar mass 10,000 g mol-1. The… · Polymer Chemistry – General
ABC26PH1352 · Metallic silver crystallizes in face-centred-cubic lattice structure with a unit cell of length 40 nm . The first order diffraction angle… · Crystal Systems Lattices
ABC26PH1353 · Polonium is the only metal known to exist in a simple cubic lattice form. The density of polonium at 0°C is measured to be 10.00 g / cm3… · Crystal Systems Lattices
ABC26PH1397 · Consider a system of three particles which can occupy energy levels with energy 0, and 2 , such that the total energy E=4 . Cases A, B and… · Statistical Thermodynamics – General
ABC26PH1398 · The first excited state ( 2 P1 / 2 ) of fluorine lies at an energy of 400 cm-1 above the ground state ( 2 P3 / 2 ). The fraction of… · Statistical Thermodynamics – General
ABC26PH1435 · An intense purple colour (Plasmon band) is exhibited by a colloid consisting of spherical · Colloids Micelles
ABC26PH1436 · The figure below depicts an adsorption isotherm of O2, on charcoal at 90 K .At a pressure 25 torr, only 10 \% of charcoal sites are… · Adsorption Isotherms
ABC26PH1496 · A one-component system with the associated phase diagram (see the figure) is not possible because · Phase Equilibria
ABC26PH1497 · A phase transition process is always · Thermodynamics – General
ABC26PH1498 · The correct statement for any cyclic thermodynamic process is · Thermodynamics – General
ABC26PH1499 · The fugacity of a real gas is less than the pressure ( P ) of an ideal gas at the same temperature (T) only when ( Tb is the Boyle… · Thermodynamics – General
ABC26PH1500 · The minimum work required by an engine to transfer 5 J of heat from a reservoir at 100 K to one at 300 K is · Thermodynamics – General
ABC26OR1094 · The most stable conformation for the following compound is · Quanta Point – General