133 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26IN0017 · Among SO2(OH)F, CH3CO2H, LiF and H2O, the compound(s) which behave(s) as a base in liquid HF is/are · Acid and Bases – General
ABC26IN0019 · In spectrofluorimetric determination in solution · Analytical Chemistry – General
ABC26IN0072 · The ion having the highest bond order is · Chemical Bonding – General
ABC26IN0073 · The magnitude of bond angles in gaseous NF3, SbF3 and SbCl3 follow the order · Chemical Bonding – General
ABC26IN0074 · Consider the following statements for Allred-Rochow electronegativity (chi AR): (i) chi AR is directly proportional to Zeff (ii) chi AR is… · Chemical Bonding – General
ABC26IN0168 · For the complex shown below in non-fluxional state, the expected 31P{1H} NMR resonance(s) is/are [31P = I = 1/2] · Inorganic Spectroscopy – General
ABC26OR0064 · The correct order for the rate of thermal decarboxylation of the following compounds is A B C · General Organic Chemistry – General
ABC26OR0065 · The correct order of basicity of the following compounds is CH2NO2 (A) 2CN (B) (C) (D) · Acidity Basicity
ABC26OR0066 · The correct IUPAC name for the following molecule is · Nomenclature Polycyclics
ABC26OR0068 · The correct order of stability of the carbocations A-C is A B C · Carbocation Stability
ABC26OR0069 · The correct statement about for the orientation of the bromine atoms in the most stable conformations of A and B is A B · Conformational Analysis
ABC26OR0070 · The synthetic equivalent of given synthon is C=O · General Organic Chemistry – General
ABC26OR0071 · The number of geometrical isomers of the complex [RhH(C ≡ CR)2 (PMe3)3] · General Organic Chemistry – General
ABC26OR0072 · The correct order of pKa of the following compounds is A B C · Acidity Basicity
ABC26OR0119 · The natural product that gives signal at delta 218 ppm in its 13 C NMR spectrum · Natural Products – General
ABC26OR0138 · The frequency of O-H stretch occurs at 3600 cm-1. The O-D stretch frequency (in cm-1) would be closest to · IR
ABC26OR0139 · The compound that shows peaks in the EI mass spectrum at m/z 121, 105, 77, 44 is · Mass Spec
ABC26OR0414 · E1cb mechanism is followed in the reaction of: · Carbonyl Chemistry
ABC26OR0419 · The major product in the following reaction is: CF3CO2H Cbz = · Named Reactions
ABC26OR0420 · The major product in the following reaction is: H2 (3 atm) · Named Reactions
ABC26OR0421 · The major product formed in the following reaction is [2. H2O2, NaOH]1. CHCl3, KOH · Named Reactions
ABC26OR0424 · The major product in the following reaction is: 3. MeP(OEt)2 4. H3O+ · Named Reactions
ABC26OR0427 · The major product in the following reaction is: cat. NaCN · Named Reactions
ABC26OR0430 · The major product A and the byproducts B formed in the following reaction are 2. P(OMe)3, heat A + B · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0436 · In the following transformation, the enantiomerically pure lactone A is A B · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0440 · The major product in the following reaction is CSA = camphorsulfonic acid · Named Reactions
ABC26OR0441 · The major product in the following reaction sequence is · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0442 · The structure of A in the following reaction is A [2. NaOEt, EtOH]1. i) h nu ii) O3, Me2S · Named Reactions
ABC26OR0444 · The correct sequence of reactions involved in the following transformation is: · Named Reactions
ABC26PH0047 · The oxidation of NO to NO2 occurs via the mechanism given below. 2NO k-1k1⇌ N2O2; N2O2 + O2 k2 2NO2 (d[NO2])/dt in the presence of large… · Chemical Kinetics – General
ABC26PH0048 · Substance 'A' is exposed to 600 nm, 100 W light source for 6626 s, with 50% of the incident light being absorbed. 'A' decomposes according… · Chemical Kinetics – General
ABC26PH0075 · For the electrochemical cell Ag|AgCl|MCl(0.01 M)|MCl(0.02 M)|AgCl|Ag, the junction potential is the highest when M^+ is · Electrochemistry – General
ABC26PH0076 · The electrolyte solution that has the smallest Debye-length at 298 K is · Debye Huckel
ABC26PH0089 · A cube does not have the symmetry element · Symmetry Elements Point Groups
ABC26PH0090 · The reducible representation Gamma, in the table is equal to the following superposition of the irreducible representation of C2v point… · Character Tables
ABC26PH0091 · The observed IR spectrum of BCl3 exhibits three bands at 995, 480 and 244 cm-1, while the Raman bands are observed at 995, 471 and 244… · Group Theory – General
ABC26PH0092 · Given the matrices for C3 and sigma h below C3 = -1/2 -√(3/2) 0 √(3/2) -1/2 0 0 0 1 sigma h = 1 0 0 0 1 0 0 0 1 the trace of the matrix… · Group Theory – General
ABC26PH0101 · The molar residual entropy (in J/K) for solid OCS is close to · Gaseous State – General
ABC26PH0102 · A monoatomic perfect gas undergoes expansion from (p1, V1) to (p2, V2) under isothermal or adiabatic conditions. The pressure of the gas… · Gaseous State – General
ABC26PH0109 · The atomic masses of fluorine and hydrogen are 19.0 and 1.0 amu, respectively (1 amu = 1.67 × 10-27 kg). The bond length of HF is 2.0 Å… · Molecular Spectroscopy – General
ABC26PH0126 · Using standard equation for intrinsic viscosity [ eta]=KMva for a solution of polymer and any information from the graph identify viscosity… · Viscometry Characterisation
ABC26PH0218 · A liquid of density 1.1 g cm-3 climbs to a height of 5.0 cm when a capillary with internal radius of 0.2 mm is dipped into it. The surface… · Surface Tension
ABC26PH0219 · The order of a surface catalyzed unimolecular reaction, at very low and very high pressures of the reactant, would be, respectively · Catalysis Surface
ABC26PH0252 · Consider the entropy changes in a system undergoing transformation, as depicted in the diagram, below The correct statement among the… · Laws State Functions
ABC26PH0253 · Molar composition of a mixture of P and Q at equilibrium is 3:1 (P:Q). A small disturbance in composition results in change of chemical… · Partial Molar Quantities
ABC26PH0255 · A monatomic perfect gas undergoes expansion from (p1, V1) to (p2, V2) under isothermal or adiabatic conditions. The pressure of the gas… · Thermodynamics – General
ABC26PH0256 · The excess molar entropy of mixing of liquid A with liquid B is -Rln 2. The experimentally observed change in entropy upon mixing 1.0 mol… · Laws State Functions
ABC26IN0820 · Choose the equilibria from the following that are NOT favoured to go to right (A) As2S5+5HgO gives As2O5+5HgS (B) La2(CO3)3+Bi2S3 gives… · Acids & Bases – General
ABC26IN0821 · Among SO2(OH)F, CH3CO2H, LiF and H2O, the compound(s) which behave(s) as a base in liquid HF is/are · Acids & Bases – General
ABC26IN0825 · The pair of light source and atomizer resulting highest sensitivity to atomic absorption spectrometric measurement is: · Analytical Chemistry – General