110 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26IN1168 · In the presence of an external magnetic field (normal Zeeman effect), the transition 1 D2 1 P1 splits into · Magnetic Measurements
ABC26IN1169 · In Mössbauer experiment, a source emitting at 14.4 KeV (3.48 1018 Hz ) had to be moved towards absorber at 2.2 mms-1 for resonance. The… · Inorganic Spectroscopy – General
ABC26IN1205 · Consider following lanthanide (III) ions arrayl (A) Nd(III) \\ (B) Gd(III) \\ (C) Dy(III) array The magnetic moment closest to the spin… · Lanthanides & Actinides – General
ABC26IN1206 · The ground state term symbol for Nb (atomic number 41) is 6D. The electronic configuration corresponding to this term symbol is · Lanthanides & Actinides – General
ABC26IN1251 · Which of the following pairs has the highest difference in their first ionization energy? · Main Group Elements – General
ABC26IN1252 · Which of the following is used as propellant for whipping creams? · Main Group Elements – General
ABC26IN1253 · Flame proof fabrices contain · Main Group Elements – General
ABC26IN1254 · Among the oxides of nitrogen, N2 O3, N2 O4, and N2 O5 the compound(s) having N-N bond is/are · Main Group Elements – General
ABC26IN1255 · Identify the pairs in which the covalent radii of elements are almost similar arrayll (A) Nb, Ta & (B) Mo, W \\ (C) La, Lu & (D) Sc, Y array · Main Group Elements – General
ABC26IN1256 · The correct equilibrium order for the interconversion of different forms of SiO2 is · Main Group Elements – General
ABC26IN1338 · For neutron activation analysis of an element, the favourable characteristics of both the target and the product are from the following… · Nuclear Chemistry – General
ABC26IN1374 · The oxidation state of molybdenum in [ (7 -tropylium ) Mo(CO)3 ]+is: · Organometallic Compounds – General
ABC26IN1375 · The reaction, [(CO)5 Mn(Me) ]+CO [(CO)5 Mn\C(O) Me\ ] is an example for · Oxidative Addition Reductive Elimination
ABC26IN1376 · The orders of reactivity of ligands, NMe3 PMe3, and CO with complexes MeTiCl, and (CO)5 Mo (thf) are · Organometallic Compounds – General
ABC26IN1377 · The number of metal-metal bonds in [W2(OPh)6 ] is: · Metal Carbonyls
ABC26IN1378 · The number of metal-metal bonds in Ir4(CO)12 is · Metal Carbonyls
ABC26OR0957 · In the IR spectrum, the absorption band due to carbonyl group in phenyl acetate appears at · IR
ABC26OR0958 · In the UV-visible is spectrum, a diterpenoid exhibited =275 nm. The compound, among the choices given below is · Organic Spectroscopy – General
ABC26OR0959 · In the broad band decoupled 13 C NMR spectrum, the number of signals appearing for the two pyrene diols A and B (A) (B) · Organic Spectroscopy – General
ABC26OR1024 · Among the following dienes, the one that undergoes a degenerate Cope rearrangement is · Sigmatropic Shifts
ABC26OR1025 · The major product formed in the following reaction is + 1. 2. TiCl3, HCl · Pericyclic Reactions – General
ABC26OR1026 · The major product formed in the following reaction is + Delta · Pericyclic Reactions – General
ABC26OR1027 · The most appropriate mode of cyclisation in the following transformation is · Woodward Hoffmann Rules
ABC26OR1072 · The following photochemical conversion proceeds through · Photocycloaddition
ABC26PH0896 · In atom recombination reactions · Chemical Kinetics – General
ABC26PH0897 · A radioisotope 41 Ar initially decays at the rate of 34, 500 disintegrations/minute, but decay rate falls to 21, 500 disintegrations/minute… · Chemical Kinetics – General
ABC26PH0898 · Observe the following statements (I) In the H2-O2 reaction, explosion occurs when the rate of chain branching exceeds that of chain… · Rate Laws Order
ABC26PH0899 · The concentrations of a species A undergoing the reaction A → P is 1.0, 0.5, 0.33, 0.25 mol dm -3 at t=0,1,2 and 3 seconds, respectively… · Chemical Kinetics – General
ABC26PH0900 · In the Lindemann mechanism of unimolecular reactions, the observed order at lowconcentration is: · Chemical Kinetics – General
ABC26PH0901 · A bacterial colony grows most commonly by cell division. The change in the population due to cell division in an actively growing colony is… · Chemical Kinetics – General
ABC26PH0902 · The rate equation for the reaction 2 AB+B2 2 AB2 is given byrate =k[AB] [B2 ] A possible mechanism consistent with this rate law is · Rate Laws Order
ABC26PH0903 · A 0.1 M solution of compound A shows 50 \% transmittance when a cell of 1 cm width is used at lambda nm. Another 0.1 M solution of compound… · Chemical Kinetics – General
ABC26PH0904 · A chemical reaction involving nonlinear molecule + nonlinear molecule ⇋nonlinear activated complex .The number of vibrational degrees of… · Chemical Kinetics – General
ABC26PH0958 · The correlation coefficient of two parameters is found to be -0.99 . It may be concluded that the two parameters are · Regression Fitting
ABC26PH0959 · For two variables x and y , the following data set is given: The correct statement for the covariance A and correlation coefficient B of x… · Regression Fitting
ABC26PH0982 · If the concentration (c) is increased to 4 times its original value (c), the change in molar conductivity for strong electrolytes is (where… · Conductance
ABC26PH0983 · (being typed) · Electrochemistry – General
ABC26PH0984 · Which is correct Nernst equation for redox reaction O+n e ? · Nernst Cells
ABC26PH1106 · A triatomic molecule of the type AB2 shows two IR absorption lines and one IR-Raman line. The structure of the molecule is: · Raman
ABC26PH1107 · In NMR spectroscopy, the product of the nuclear 'g' factor (gN ), the nuclear magneton ( ) and the magnetic field strength (B0 ) gives the · Molecular Spectroscopy – General
ABC26PH1108 · An AX system gave 4 lines at 4.72, 4.6, 1.12 and 1.0 ppm away from the TMS using an nmr spectrometer operating at 100 MHz . What are the… · Molecular Spectroscopy – General
ABC26PH1234 · The wave function of a certain system is the linear combination =√(1/4) 1+√(3/4) 2 where 1 and 2 are energy eigen functions with eigen… · Quantum Chemistry – General
ABC26PH1235 · For the particle-in-a-box problem in (0, L) an approximate wave function is given as x(L / 2-x)(L-x). The average energy E for such a state… · Quantum Chemistry – General
ABC26PH1236 · The hydrogenic orbital with the form of the radial function r2 (1-r ) (2-r ) [- beta r] where a1, a2 and b are constants, may be identified… · Hydrogen Atom
ABC26PH1237 · The operator [x, [x, p2 ] ] is identical with · Postulates Operators
ABC26PH1238 · For the particle-in-a-box problem in (0, L) the value of x3 in the n limit would be · Quantum Chemistry – General
ABC26PH1239 · Identify the Huckel determinant for cyclobutadiene · Huckel MO Theory
ABC26PH1240 · In the formation of H2 molecules from 2H atoms placed at positions A and B, and separated by a distance rAB, a part of special wave… · Quantum Chemistry – General
ABC26PH1331 · The coordinates for the atoms in a body centred cubic unit cell are · Crystal Systems Lattices
ABC26PH1332 · The inter planar distance () for a (100) plane in a cubic structure with the lattice parameter of 4 is: · Crystal Systems Lattices