70 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26IN0010 · The compound that gives a basic solution in HF is : · Acid and Bases – General
ABC26OR0048 · The IUPAC name of the following compound is · Nomenclature Polycyclics
ABC26OR0108 · The correct match of natural products in Column-I with their biosynthetic precursors in Column-II is Column-I A. B. Column-II I. L-Lysine… · Natural Products – General
ABC26OR0109 · Among the following, the natural product that is a steroid and contains an alpha, beta -unsaturated ketone is · Alkaloids
ABC26OR0110 · The major product formed in the reaction of D-glucose with 2 ZnCl in MeOH is a methyl glucopyranoside (A or B). The structure of this… · Carbohydrates
ABC26OR0130 · 13C NMR spectrum of DMSO-d6 gives a signal at delta 39.7 ppm as a · NMR 1H
ABC26OR0131 · The correct structure of the compound based on the following characteristic spectral data is IR: 1736 cm-1 1H NMR: delta 3.59 (s, 3H), 3.32… · Combined Structure Elucidation
ABC26OR0330 · The major product formed in the sodium ethoxide mediated reaction between benzophenone and chloroacetate is · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0336 · The correct combination of reagents to effect the following reaction is: → · Named Reactions
ABC26OR0338 · The correct combination of reagents A and B to effect the following transformations are B A · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26PH0068 · 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)… · Nernst Cells
ABC26PH0069 · 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… · Electrochemistry – General
ABC26PH0117 · 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
ABC26PH0243 · The correct statement for any cyclic thermodynamic process is · Thermodynamics – General
ABC26IN0812 · The compound that gives a basic solution in HF is : · Acids & Bases – General
ABC26IN0813 · Match items in column A with items in column B: · Acids & Bases – General
ABC26IN0835 · Identify the correct statement(s) for phosphorimetric measurement from the following: A. It is done after a time delay when fluorescence… · Analytical Chemistry – General
ABC26IN0836 · Identify correct statements from the following: A. Area of differential thermal analysis peak is proportional to amount of sample. B. Area… · Analytical Chemistry – General
ABC26IN0895 · The resonance Raman stretching frequencies (in cm-1) of the bound O2 species in oxyhemerthyrin and oxy-hemoglobin, respectively, are · Oxygen Carriers Hemoglobin
ABC26IN0896 · In vitro reaction of an excess of O2 with free heme B in aqueous medium the end product is · Bioinorganic Chemistry – General
ABC26IN0897 · Consider the following statements for metallothioneins: A. the contain about 30% cysteine residues B. they prefer to bind soft metal ions… · Iron Sulfur Proteins
ABC26IN0898 · Consider the following statements for deoxy-hemerythrin and deoxy-hemocyanin: A. they are involved in O2 transport in biological systems B… · Metal Toxicity Medicine
ABC26IN0960 · Based on VSEPR theory, the predicted shapes of [XeF5]-and BrF5 respectively, are · MO Theory Diatomics
ABC26IN1096 · CdS, HgS and BiI3 are coloured due to · Electron Transfer Redox
ABC26IN1097 · The relative rates of water exchange for the hydrated complexes of (1) Ni2+ (2) V2+ and (3) Cr3+ ions follows the trend: · Coordination Chemistry – General
ABC26IN1098 · Consider the following sulfur donor atom bearing bidentate ligand where X and name of ligands are given in following columns Correct match… · Molecular Orbital Ligand Field
ABC26IN1100 · Consider the following statements for octahedral complexes. (a) [CrF6]3- (b) [Cr(ox)3]3- and (c) [Cr(en)3]3+ A. their d → d transitions are… · Jahn Teller
ABC26IN1101 · Match the items in the three columns. The correct answer is · Coordination Chemistry – General
ABC26IN1185 · Mössbauer spectrum of complex [Fe(1,10-phenanthroline)2(NCS)2] shows two lines at 300 K, four lines at 186 K, and again two lines at 77 K… · Inorganic Spectroscopy – General
ABC26IN1186 · (R3Ge)2 on photolysis gives a radical which shows ESR spectrum. The ESR signals carrying the signature of 73Ge (I=9/2) are in terms of · Inorganic Spectroscopy – General
ABC26IN1187 · The 31P(1H) NMR spectrum of 2,2,6,6-N4P4Cl4(NMe2)4 is expected to show · Inorganic Spectroscopy – General
ABC26IN1217 · Which one of the following pairs has two magic numbers for closed nuclear shells? · Lanthanides & Actinides – General
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
ABC26IN1455 · Choose the isoelectronic pair among the following: A. [V(CO)6] B. [Cu(eta 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
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 [ (eta 5-Cp) Fe (eta 6-C6 H6)]+will give · Oxidative Addition Reductive Elimination
ABC26IN1460 · The mu eff [Fe(S2CNEt2)3] changes with temperature with the involvement of two electronic states. The states are · 18 Electron Rule
ABC26OR0986 · 13C 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 2. t-BuOK · Sigmatropic Shifts
ABC26OR1048 · Following reaction is an example of + · Cycloaddition Diels Alder
ABC26OR1049 · Following reaction involves · Sigmatropic Shifts
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