87 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26IN0061 · The number of lone-pairs are identical in the pairs · Chemical Bonding – General
ABC26OR0018 · The IUPAC name for the compound given below is · Nomenclature Polycyclics
ABC26OR0019 · In the compound given below, the hydrogens marked A and B are · General Organic Chemistry – General
ABC26OR0020 · Among the following compounds, the one which has highest dipole moment is · General Organic Chemistry – General
ABC26OR0085 · Match the following drugs with their medicinal activity · Steroids
ABC26OR0086 · The biosynthetic precursor for the steroids is · Steroids
ABC26OR0087 · Number of isoprene units present in lupeol is · Terpenoids
ABC26OR0089 · alpha -Pinene on reaction with dilute alkaline KMnO4 produces a diol, which on further oxidation with chromium trioxide gives product A… · Natural Products – General
ABC26OR0090 · The major product formed in the reaction of guanosine with one equivalent of methyl iodide is · Natural Products – General
ABC26OR0091 · Reaction of the dipeptide, given below, with hydrogen in the presence of 10% palladium over carbon, produces a mixture of · Amino Acids Peptides
ABC26OR0124 · In the UV-visible is spectrum, a diterpenoid exhibited a lambda max =275 nm. The compound, among the choices given below is · UV Vis
ABC26OR0125 · In the broad band decoupled 13C NMR spectrum, the number of signals appearing for the two pyrene diols A and B (A) (B) · NMR 13C
ABC26OR0126 · An organic compound exhibited the following 1H NMR spectra data: delta : 7.80(2H, d, J=8 Hz), 6.80(2H, d, J=8 Hz), 4.10(2H, q, J=7.2 Hz)… · NMR 1H
ABC26OR0145 · The major product formed in the following reaction is + Delta · Pericyclic Reactions – General
ABC26OR0217 · The major product formed in the following reaction is: 1. CH3CO3H · Named Reactions
ABC26OR0219 · The major product formed in the following reaction is: 1. NaH, CS2, MeI · Named Reactions
ABC26PH0005 · What is the atomic term symbol for helium atom with electronic configuration 1s2? · Term Symbols Atoms
ABC26PH0079 · Identify the Mulliken notation for the following irreducible representation · Character Tables
ABC26PH0213 · The aggregation of surfactant molecules is known as · Colloids Micelles
ABC26PH0214 · "Colloids are thermodynamically unstable with reference to bulk but kinetically stable". Identify the correct pair · Surface Tension
ABC26IN0803 · The compound that will behave as an acid in H2 SO4 is · Acids & Bases – General
ABC26IN0863 · The coordination geometry of copper (II) in the type I copper protein plastocyanin is: · Copper Proteins
ABC26IN0864 · The metal ions present in the active site of nitrogenase enzyme co-factor are · Nitrogen Fixation
ABC26IN0865 · For the metalloprotein hemerythrin, the statement that NOT TRUE is · Metal Toxicity Medicine
ABC26IN0935 · The number of lone-pairs are identical in the pairs · Chemical Bonding – General
ABC26IN0937 · The molecule in which the bond order increases upon addition of an electron · Hydrogen Bonding Weak Interactions
ABC26IN0938 · The energy of 2s and 2p orbitals is the same for · Chemical Bonding – General
ABC26IN0939 · If a homonuclear diatomic molecule is oriented along the Z-axis, the molecular orbital formed by linear combination of px orbitals of the… · Chemical Bonding – General
ABC26IN0940 · According to VSEPR theory, the geometry (with lone pair) around the central iodine in I3+and I3- ions respectively are · VSEPR Geometry
ABC26IN1021 · The reaction of Pt (NH3)42- with two equivalents of NH3 produces · Reaction Mechanisms Substitution
ABC26IN1022 · The electronic transition responsible for the colour of the transition metal ions is · Electron Transfer Redox
ABC26IN1023 · The Mulliken symbols for the spectroscopic states arising from the free-ion term F are · Term Symbols Spectra
ABC26IN1024 · Which of the pairs will generally result in tetrahedral coordination complexes, when ligands are Cl- or OH-. (A) Be(II), Ba(II) (B) Ba(II)… · Molecular Orbital Ligand Field
ABC26IN1025 · Silica gel contains [Co (Cl4)]2- as an indicator. When activated, silica gel becomes dark blue while upon absorption of moisture, its… · Crystal Field Theory
ABC26IN1026 · Intense band at 15000 cm-1 in the UV-visible spectrum of [Bu4N]2Re2Cl8 is due to the Transition · Coordination Chemistry – General
ABC26IN1027 · Identify the order representing increasing pi -acidity of the following ligands C2F4, NEt3, CO and C2H4 · Molecular Orbital Ligand Field
ABC26IN1028 · The species with highest magnetic moment (spin only value) is · Coordination Chemistry – General
ABC26IN1029 · Three bands in the electronic spectrum of [Cr (NH3)6]3+ are due to the following transitions (A) 4A2g→4T1g (B) 4A2g→4T2g (C) 4A2g→2Eg… · Electron Transfer Redox
ABC26IN1030 · The Delta t of the following complexes (A) [Co(Cl4)]2- (B) [Co(Br4)]2- (C) [Co(NCS)4]2- Follows the order · Coordination Chemistry – General
ABC26IN1166 · Among the following, those can act as Mössbauer muclei are (A) 129I (B) 57Co (C) 57Fe (D) 121Sb · Inorganic Spectroscopy – General
ABC26IN1167 · For a tetragonally distorted Cr(III) complex, zero-field splitting results in the following number of Kramers doublets: · Inorganic Spectroscopy – General
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 (A) Nd(III) (B) Gd(III) (C) Dy(III) The magnetic moment closest to the spin only value is(are) for · 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 (A) Nb, Ta (B) Mo, W (C) La, Lu (D) Sc, Y · Main Group Elements – General
ABC26IN1256 · The correct equilibrium order for the interconversion of different forms of SiO2 is · Main Group Elements – General