111 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26IN1242 · Among the halides, NCl3(A), PCl3(B) and AsCl3(C), those which produce two different acids. · Main Group Elements – General
ABC26IN1243 · The most used acid catalyst in oil industry and the relevant process are respectively · Main Group Elements – General
ABC26IN1244 · The correct structure of P4S3 is: · Main Group Elements – General
ABC26IN1245 · Low oxidation state complexes are often air-sensitive, but are rarely water sensitive because · Main Group Elements – General
ABC26IN1339 · In 'carbon-dating' application of radioisotopes, 14C emits · Isotope Applications
ABC26IN1357 · The reactions of Ni(CO)4 with the ligand (L=PMe3 . or .P(OMe)3 ) L yields Ni(CO)3 L. The reaction is · Organometallic Compounds – General
ABC26IN1358 · Among the following the strongest oxidizing agent is: · Organometallic Compounds – General
ABC26IN1359 · For the reaction, trans- [IrCl(CO) (PPh3 )2 ]+Cl2 trans - [IrCl3(CO) (PPh3 )2 ] the correct observation · Organometallic Compounds – General
ABC26IN1360 · The carbonyl resonance in 13C NMR spectrum of [(5-C5H5)Rh(CO) ]3 (103Rh, nuclear spin, I = 1/2, 100\%) shows a triplet at -65 owing to the… · Organometallic Compounds – General
ABC26IN1361 · The cluster having arachno type structure is: · Cluster Compounds Wade Rules
ABC26IN1362 · The final product of the reaction [Mn(CO)6]+ + MeLi is: · Organometallic Compounds – General
ABC26IN1363 · The reaction 3 [Rh4(CO)12 ] 2 [Rh6(CO)16 ]+4 CO [25 C, 500 atm CO ] is: · Metal Carbonyls
ABC26IN1364 · The complex that DOES NOT obey 18 - electron rule is: · 18 Electron Rule
ABC26OR0950 · The number of signals that appear in the broadband decoupled 13 C NMR spectrum of phenanthrene and anthracene, respectively are · NMR 13C
ABC26OR0951 · In the 400 MHz, 1 H NMR spectrum of organic compound exhibited a doublet. The two lines of the doublet are at delta 2.35 and 2.38 ppm . The… · NMR 1H
ABC26OR0952 · Compounds A and B exhibit two singlets, each in theirH NMR spectra. The expected chemical shifts are at delta · NMR 1H
ABC26OR1020 · The major product formed in the following concerted reaction is · Pericyclic Reactions – General
ABC26OR1021 · The two step conversion of 7-dehydrocholesterol to vitamin D3 proceeds through · Electrocyclic
ABC26OR1070 · Structure of the starting material A in the following photochemical Norrish reaction, is · Photocycloaddition
ABC26PH0885 · For a reaction, the rate constant k at 27 C was found to be k=5.4 1011 e-50. The activation energy of the reaction is: · Arrhenius Activation
ABC26PH0886 · The rate law for one of the mechanism of the pyrolysis of CH3 CHO at 520 C and 0.2 bar is Rate =- |k2 (k12 k1 )1 / 2 | [CH3 CHO ]3 / 2 The… · Arrhenius Activation
ABC26PH0887 · In the Michaelis-Menten mechanism for enzyme kinetics, the expression obtained is: v[E]0[S]=1.4 1012-104 v[E]0 The values of k3 (K_ ems… · Enzyme Kinetics
ABC26PH0888 · One of the assumptions made in the conventional activated complex theory is: · Chemical Kinetics – General
ABC26PH0889 · The quantitative determination of N2 H4 with KIO3 proceeds in a mixture of H2 O / CCl4 as Follows N2 H4+KIO3+2 HCl N2+KCl+ICl+3 H2 O The… · Chemical Kinetics – General
ABC26PH0890 · The carbon-14 activity of an old wood sample is found to be 14.2 disintegrations -1 g-1.Calculate age of old wood sample, if for a fresh… · Chemical Kinetics – General
ABC26PH0891 · "Phosphorescence" is represented as · Chemical Kinetics – General
ABC26PH0892 · Using cuvettes of 0.5 cm path length, a 10-4 M solution of a chromophore shows 50 \% transmittance at certain wave length. The molar… · Chemical Kinetics – General
ABC26PH0955 · The data obtained from two sets of experiments A and B have the following characteristics It may be concluded that · Error Propagation
ABC26PH0956 · Two data sets involving the same variables X and Y are given below If the slopes and intercepts of the regression lines for the two sets… · Regression Fitting
ABC26PH0975 · The molar conductivities at infinite dilution 0 for Na2 SO4, K2 SO4, KCl, HCl and HCOONa at 300 K are 260, 308, 150, 426 and… · Electrochemistry – General
ABC26PH0976 · The correct value of E , of a half cell in the following graph of E vs m (molality) is: · Electrochemistry – General
ABC26PH0977 · The correct Nernst equation for the concentration cell: Pt |H2(p) | HCl (a )1|AgCl(s)| Ag \| Ag|AgCl(s)| HCl (a )2|H(p)| Pt without liquid… · Nernst Cells
ABC26PH1101 · For a diatomic molecule AB, the energy for the rotational transition from J=0 to J=1 state is 3.9 cm-1. The energy for the rotational… · Rotational
ABC26PH1102 · For the vibrational Raman spectrum of a homonuclear diatomic molecule, the selection rule under harmonic approximation is · Raman
ABC26PH1103 · The following data were obtained from the vibrational fine structure in the vibronic spectrum of a diatomic molecule: =512 cm-1, xe=8 cm-1… · Vibrational
ABC26PH1173 · A polymer sample has the following composition. The polydispersity index (P.D.I) of the polymer is · Molecular Weight Averages
ABC26PH1174 · During the addition polymerization, the reaction proceeds via · Polymerisation Kinetics
ABC26PH1175 · The number-average molar mass (MN ) and weight-average molar mass (Mw ) of a polymer are obtained respectively by · Viscometry Characterisation
ABC26PH1216 · For any operator A and its adjoint A, the INCORRECT statement is: · Postulates Operators
ABC26PH1217 · For hydrogen-like atom with a nuclear charge Z , the energy of orbital with principal quantum number 'n' follows the relation. · Hydrogen Atom
ABC26PH1218 · The average value of the radius <r> in the 1 s state of the hydrogen atom is ( a0 is Bohr radius) · Hydrogen Atom
ABC26PH1219 · The probability of finding the particle in a one dimensional box of length 'L' in the region between L/4 and 3 L/4 for quantum number n=1 is · Particle In A Box
ABC26PH1220 · A particle in three dimensional cubic box of length L has energy of 14 h28 mL2. The degeneracy of the state is · Particle In A Box
ABC26PH1221 · The following are the three statements about perturbation theory (A) Second order perturbation correction to the ground state energy is… · Perturbation Theory
ABC26PH1222 · Using Huckel molecular orbital approximation, the two roots of secular equation of ethane are · Huckel MO Theory
ABC26PH1223 · For H2 molecule in the excited state 1 1 spin part of the triplet state with ms=0 is proportional to · Angular Momentum
ABC26PH1323 · How many atoms are there in an element packed in a fcc structure · Solid State Chemistry – General
ABC26PH1324 · The structure obtained when all the tetrahedral holes are occupied in a fee structure is of the type · Solid State Chemistry – General
ABC26PH1325 · The lattice parameter of an element stabilized in a fcc structure is 4.04 . The atomic radius of the element is: · Crystal Systems Lattices