105 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26IN1284 · The ring size and the number of linked tetrahedral present in [Si6O18]12- are, respectively · Ring Cage Cluster
ABC26IN1285 · Consider the following reaction : N3P3Cl6 + 6HNMe2 → N3P3Cl3(NMe2)3 + 3 Me2NH.HCl [A] The number of possible isomers for [A] is · Main Group Elements – General
ABC26IN1286 · The reaction of BCl3, with NH4Cl gives product A which upon reduction by NaBH4 gives product B. Product B upon reacting with HCl affords… · Main Group Elements – General
ABC26IN1287 · Protonated form of ZSM-5 catalyzes the reaction of ethene with benzene to produce ethylbenzene. The correct statement for this catalytic… · Main Group Elements – General
ABC26IN1334 · Identify radioactive capture from the following nuclear reactions: · Nuclear Reactions Q Value
ABC26IN1423 · The W-W bond order in [W (eta 5-C5 H5)(mu -Cl)(CO)2]2 is · Organometallic Compounds – General
ABC26IN1424 · For the reaction of [Fe (eta 5-C5 H5) (CH3)(CO)2] with PMe3, the main intermediate is · Organometallic Compounds – General
ABC26IN1425 · [(eta3-mathrmC3H5)mathrmMn(CO)4] shows fluxional behavior. The 1mathrmH NMR spectrum of this compound when it is in the non-fluxional state… · Cluster Compounds Wade Rules
ABC26IN1426 · Using Wade's rules predict the structure type of [C2 B5 H7] · Cluster Compounds Wade Rules
ABC26IN1427 · For uranocene, the correct statement(s) is/are · Organometallic Compounds – General
ABC26IN1428 · The final products of the reaction of carbonyl metalates [V(CO)6]- and [Co(CO)4]- with H3 PO4 respectively, are · Metal Carbonyls
ABC26IN1429 · The number of valence electrons provided by [Ru(CO)3] fragment towards cluster bonding is · 18 Electron Rule
ABC26IN1430 · The intermediate and the final major product of photolysis of Z (Z) From the following are (A) (B) (C) (D) · Organometallic Compounds – General
ABC26IN1431 · Reaction of [Mn2(CO)10] with I2, results in A without loss of CO. Compound A, on heating of 120°C loses a CO ligand to give B, which does… · Cluster Compounds Wade Rules
ABC26IN1433 · Identify the species, those obey the 18 electron rule, from the following: (A) (B) (C) (D) · 18 Electron Rule
ABC26IN1434 · The following transformation is an example of · Oxidative Addition Reductive Elimination
ABC26IN1435 · CpM [Cp. is. (eta 5-C5 H5)] fragment isolobal with a BH fragment is · Organometallic Compounds – General
ABC26IN1436 · The number of metal-metal bonds in [Co2 Fe2(CO)11 (eta 4-PPh)2] is · Metal Carbonyls
ABC26IN1437 · Choose the correct option for carbonyl fluoride with respect to bond angle and bond length · Organometallic Compounds – General
ABC26IN1439 · The 1H NMR spectrum of [Ru (eta 4-C8 H8)(CO)3] at 23°C consists of a sharp single line. The number of signals observed at low temperature… · Organometallic Compounds – General
ABC26IN1440 · The numbers of skeletal electrons present in the compounds C2 B3 H5, C2 B4 H6, and B5 H9 are, respectively · Cluster Compounds Wade Rules
ABC26IN1444 · Heating a sample of [ (eta 5-C5 H5) Mo(CO)3]2 results in the formation of [ (eta 5-C5 H5) Mo(CO)2] with elimination of 2 equivalents of CO… · Oxidative Addition Reductive Elimination
ABC26OR0976 · The structure of the compounds that matches the 1H ~ NMR data given below is 1 H ~ NMR ~ DMSO-d6: delta 7.75 dd, J=8. 8, 2. 4 Hz, 1H, 7… · Combined Structure Elucidation
ABC26OR0978 · The number of chemical shift non-equivalent protons expected in 1H NMR spectrum of alpha -pinene is alpha -pinene · NMR 1H
ABC26OR0979 · In the mass spectrum of 1,2-dichloroethane, approximate ratio of peaks at m/z values 98, 100, 102 will be · Mass Spec
ABC26OR1038 · The major product formed by photochemical reaction of (2E, 4Z, 6E)-decatriene is · Pericyclic Reactions – General
ABC26OR1040 · The following transformation involves sequential · Sigmatropic Shifts
ABC26PH0871 · The standard deviation of speed (sigma c) for Maxwell's distribution satisfies the relation · Atomic And Molecular Term Symbols – General
ABC26PH0926 · vmax and Km for an enzyme catalyzed reaction are 2.0 × 10-3 Ms-1 and 1.0 × 10-6 M, respectively. The rate of the reaction when the… · Enzyme Kinetics
ABC26PH0927 · The first order rate constant for a unimolecular gas phase reaction A → products that follows Lindemann mechanism is 2.0 s-1 at pA = 1 atm… · Rate Laws Order
ABC26PH0929 · If the rates of a reaction are R1 and R2 at concentrations C1 and C2 of a reactant respectively, the order of reaction, 'n' (assuming that… · Rate Laws Order
ABC26PH0998 · In Kohlrausch law, Lambda m= Lambda m0- kappa √(c), Lambda mo and kappa · Conductance
ABC26PH0999 · The concentration of a MgSO4 solution having the same ionic strength as that of a 0.1 M Na2SO4 solution is · Debye Huckel
ABC26PH1001 · The standard EMF of the cell Pt, H.g HCl soln. AgCls, Ag(s) · Nernst Cells
ABC26PH1062 · The product C2x. sigma xy (C2x is the two-fold rotation axis around the x-axis and sigma xy is the xy mirror plane) is · Group Theory – General
ABC26PH1063 · A molecular orbital of a diatomic molecule changes sign when it is rotated by 180° around the molecular axis. This orbital is · Group Theory – General
ABC26PH1064 · IR active normal modes of methane belong to the irreducible representation: · Character Tables
ABC26PH1118 · If the reduced mass of a diatomic molecule is doubled without changing its force constant, the vibrational frequency of the molecule will be · Molecular Spectroscopy – General
ABC26PH1119 · The molecule with the smallest rotational constant (in the microwave spectrum) among the following is · Rotational
ABC26PH1120 · The spectroscopic technique that can distinguish unambiguously between trans-1,2-dichloroethylene and cis-1,2-dichloroethylene without any… · Rotational
ABC26PH1121 · The vibrational frequency of a homo-nuclear diatomic molecule is nu. The temperature at which the population of the first excited state… · Molecular Spectroscopy – General
ABC26PH1122 · The 1H NMR frequency at 1.0T is 42.4 MHz. If the gyromagnetic ratios of 1H and 13C are 27 × 107 and 6.75 × 107T-1S-1 respectively, what… · Molecular Spectroscopy – General
ABC26PH1184 · The correct form for a simple Langmuir isotherm is · Polymer Chemistry – General
ABC26PH1185 · The correct expression for the product (Mn · Mw) [Mn and Mw are the number average and weight average molar masses, respectively, of a… · Molecular Weight Averages
ABC26PH1186 · The average end-to-end distance of a random coil polymer of 106 monomers (in units of segment length) is · Polymer Chemistry – General
ABC26PH1346 · For a simple cubic crystal lattice, the angle between the [2 0 1] plane and the xy plane is · Crystal Systems Lattices
ABC26PH1347 · For a simple cubic crystal, X-ray diffraction shows intense reflections for angles theta 1 and theta 2 which are assigned to [1 0 1] and [1… · X Ray Diffraction Bragg
ABC26PH1392 · Though a constant shift of energy levels of a system changes the partition function, the properties that do not change are · Partition Functions
ABC26PH1393 · The standard deviation of speed (sigma c) for Maxwell's distribution satisfies the relation · Maxwell Boltzmann
ABC26PH1429 · Stability of lyophobic dispersions is determined by · Surface Chemistry – General