166 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26IN0054 · The highest occupied MO in N2 and O2+ respectively are (take x-axis as internuclear axis) · Chemical Bonding – General
ABC26IN0158 · In the EPR spectrum of tetragonal Cu(II) complex, when g > g > ge, the unpaired electron resides in the orbital. · Inorganic Spectroscopy – General
ABC26IN0169 · The electronic configuration for gadalonium (Gd) is [Xe]4f7\,5d16s2, where as that of Gd2+ is: · Lanthanides & Actinides – General
ABC26IN0170 · Uranium fluorides co-precipitate with · Lanthanides & Actinides – General
ABC26IN0225 · The oxidative addition and reductive elimination steps are favoured by · Oxidative Addition Reductive Elimination
ABC26IN0226 · A and F 3. A and D 4. C and E · Metal Carbonyls
ABC26IN0227 · Oxidation occurs very easily in case of · Organometallic Compounds – General
ABC26IN0228 · Complex in which organic ligand is having only sigma -bond with metal is: · Metal Carbonyls
ABC26OR0001 · The configurations at the two stereocentres in the compound given below are · General Organic Chemistry – General
ABC26OR0002 · The two compounds given below are and · Stereochemistry R S E Z
ABC26OR0003 · In the most stable conformation of trans-1-t-butyl-3-methylcyclohexane, the substituents at C-1 and C-3, respectively, are · Conformational Analysis
ABC26OR0004 · Among the carbocations given below · Aromaticity
ABC26OR0005 · The relative rates of solvolysis of iodides A-C are · Carbocation Stability
ABC26OR0006 · The correct order of acidity of the following compound A-C is: · Acidity Basicity
ABC26OR0008 · The IUPAC name of the following compound is · Nomenclature Polycyclics
ABC26OR0009 · Among A-C, the compounds which can exhibit optical activity are · Stereochemistry R S E Z
ABC26OR0010 · With respect to electrophilic aromatic substitution, reactivity order of pyrrole, pyridine and indole is · Aromaticity
ABC26OR0011 · An optically active compound enriched with R-enantiomer (60% ee) exhibited [ alpha ]D+90 . If the [ alpha ]D value of the sample is -135… · Stereochemistry R S E Z
ABC26OR0073 · Papaverine on oxidation with potassium permanganate gives a ketone, which on fusion with potassium hydroxide gives Papaverine · Natural Products – General
ABC26OR0074 · The major product formed on nitration (HNO3/H2SO4 ) of uridine followed by reduction with tin and HCl is: · Natural Products – General
ABC26OR0075 · The major product formed in the reaction sequence is: · Natural Products – General
ABC26OR0121 · In the mass spectrum of the compound given below, during the alpha -cleavage, the order of preferential loss of groups is: · IR
ABC26OR0140 · The concerted photochemical reaction between two olefins leading to a cyclobutane ring is: · Cycloaddition Diels Alder
ABC26OR0141 · The structures of the major products X and Y in the following transformation are + Delta X Y · Pericyclic Reactions – General
ABC26OR0161 · The concerted photochemical reaction between two olefins leading to a cyclobutane ring is: · Photocycloaddition
ABC26OR0170 · The major product formed in the reaction given below is: · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0171 · The major compound X formed in the following reaction exhibited a strong absorption at umax 1765,mathrmcm-1 in the IR spectrum. The… · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0172 · The major product formed in the reaction sequence is: · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0173 · The intermediate A and the major product B in the following conversion are A B · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0174 · The major product formed in the following reaction is: · Named Reactions
ABC26OR0175 · The major product formed in the following reaction is: · Named Reactions
ABC26OR0176 · In the following reaction sequence, the correct structures for the major products X and Y are · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0177 · The major product formed in the following reaction is: · Named Reactions
ABC26OR0178 · The major product formed in the following reaction is: · Named Reactions
ABC26OR0179 · The major product formed in the following transformation is: · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26OR0180 · The major product formed in the following transformation is: · Reagents, Reaction Mechanisms & Named Reactions – General
ABC26PH0001 · The term symbol of a molecule with electronic configuration (1 )2 (1 )2 (2 )2 (2 )2 (2 )1 (2 )1 is: · Term Symbols Atoms
ABC26PH0002 · The possible J values for 3 D term symbol are · Term Symbols Atoms
ABC26PH0051 · For an aqueous solution at 25°C, the Debye-Huckel limiting law is given by · Debye Huckel
ABC26PH0093 · An ideal gas expands by following an equation PVa= constant. In which case does one expect heating? · Kinetic Theory of Gasses – General
ABC26PH0094 · For an assembly of molecules (molar mass =M) at temperature T, the standard deviation of Maxweller's speed is approximately · Kinetic Theory of Gasses – General
ABC26PH0095 · The virial expansion for a real gas can be written in either of the following forms: arrayl PVRT=1+BP P+CP P2+ \\ =1+BV V+CV V2+ array If… · Real Gases Virial
ABC26PH0103 · At room temperature, which molecule has the maximum rotational entropy? · Molecular Spectroscopy – General
ABC26PH0104 · The microwave spectrum of a molecule yields three rotational constants. The molecule is · Rotational
ABC26PH0127 · arrayl1.1 2.2 3.3 4.4array · Hydrogen Atom
ABC26PH0128 · A constant of motion is defined by the equation: · Quantum Chemistry – General
ABC26PH0129 · The hermitian conjugate of operator d / d x, called (d / d x), is actually equal to · Postulates Operators
ABC26PH0130 · The energy levels for cyclobutadiene are alpha +2 beta , alpha , alpha and alpha -2 beta . The delocalization energy in this molecule is: · Quantum Chemistry – General
ABC26PH0131 · For a certain particle encountering a barrier, the tunneling probability is approximately e-10. If the mass is halved and width of the… · Quantum Chemistry – General