123 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26IN0811 · Some molecules and their properties in liquid ammonia are given in columns A and B respectively. Match column A with column B The correct… · Acids & Bases – General
ABC26IN0837 · The primary analytical method (not using a reference) is: · Analytical Chemistry – General
ABC26IN0890 · In the catalytic hydration of CO2 by carbonic anhydrase, CO2 first interacts with · Zinc Enzymes
ABC26IN0891 · The number of inorganic Sulphur (or sulphide) atoms present in the metalloprotein active sites ofrubredoxin, 2-iron ferredoxin and 4-iron… · Metal Toxicity Medicine
ABC26IN0892 · From the following transformations, A. Epoxidation of alkene B. Dioldehydrase reaction C. Conversion of… · Bioinorganic Chemistry – General
ABC26IN0893 · Match the items in Column A with the appropriate items in Column B The correct answer is · Metal Toxicity Medicine
ABC26IN0894 · Match the species in column X with their properties in column Y The correct answer is · Bioinorganic Chemistry – General
ABC26IN1085 · The HOMO (highest occupied molecular orbital) to LUMO (lowest unoccupied molecular orbital) electronic transition responsible for the… · Molecular Orbital Ligand Field
ABC26IN1086 · In the hydrolysis of trans- [Co(en)2 Cl(A)]+if the leaving group is chloride, the formation of cis product is the least, when A is · Coordination Chemistry – General
ABC26IN1087 · The nephelauxetic parameter beta is highest for · Coordination Chemistry – General
ABC26IN1088 · The 2Eg ← 4A2g transition in the electronic spectrum of [Cr (NH3)6]3+ occurs nearly at · Electron Transfer Redox
ABC26IN1089 · For [Ce (NO3)4 (OPPh3)2] from the following A. Its aqueous solution yellow-orange in B. Coordination number of Ce is ten C. It shows metal… · Charge Transfer Spectra
ABC26IN1090 · Consider the following statements for [FeO4]4- A. It is paramagnetic B. It has Td symmetry C. Adopts distorted square planar geometry D… · Coordination Chemistry – General
ABC26IN1091 · The spectroscopic ground state term symbols for the octahedral aqua complexes of Mn(II), Cr(III) and Cu(II), respectively, are · Term Symbols Spectra
ABC26IN1092 · For OH- catalysed SN1 conjugate base mechanism of [Co (NH3)5 Cl]2+, the species obtained in the first step of the reaction is/are · Reaction Mechanisms Substitution
ABC26IN1093 · In the following redox reaction with an equilibrium constant K=2.0 × 108 [Ru (NH3)6]2++ [Fe (H2 O6)]3+ → [Ru (NH3)6]3++ [Fe (H2 O)6]2+ the… · Reaction Mechanisms Substitution
ABC26IN1094 · The correct statement for a Fischer carbene complex is · Molecular Orbital Ligand Field
ABC26IN1095 · The highest molecular orbitals for an excited electronic configuration of the oxygen molecule are [1 pi g]1[3 sigma u]1. A possible… · Molecular Orbital Ligand Field
ABC26IN1181 · The expected number of 19 F NMR spectral lines, including satellites, for [XeF5]-is [Abundance of 129 Xe(I=1 / 2)=26%] · Electronic Spectra Tanabe Sugano
ABC26IN1182 · The reaction between PI3, PSCl3 and zinc powder gives P3I5 as one of the products. The solution state 31P NMR spectrum of P3I5 shows a… · Inorganic Spectroscopy – General
ABC26IN1183 · For complex A, deuteration of NH protons does not alter the EPR spectrum. The number of hyper fine lines expected in the EPR [I (63 Cu)=3 /… · Inorganic Spectroscopy – General
ABC26IN1184 · Number of lines in the 19 F NMR spectrum of F2 C(Br)-C(Br) Cl2, at -120° C assuming it a mixture of static conformations given below, are 5 · Inorganic Spectroscopy – General
ABC26IN1290 · The metal iodide with metallic lustre and high electrical conductivity is · Main Group Elements – General
ABC26IN1291 · Consider the following statements for KC8 : (A) It is paramagnetic (B) It has eclipsed layer structure (C) Its electrical conductivity is… · Main Group Elements – General
ABC26IN1292 · Among the following, choose the correct products that are formed in the reaction of S2 Cl2 with ammonia in CCl4 NH4 Cl(A), S4 N4(B), S8(C)… · Main Group Elements – General
ABC26IN1293 · The final product(s) of the reaction of arachno borane, B4 H10 with NMe3 is/are · Main Group Elements – General
ABC26IN1446 · The number of bridging ligand(s) and metal-metal bond(s) present in the complex [Ru2(eta 5-Cp)2(CO)2(Ph2PCH2PPh2)] (obeys 18-electron… · 18 Electron Rule
ABC26IN1447 · The rate of alkene coordination to [PtCl4]2- is highest for · Metal Alkene Alkyne
ABC26IN1448 · Consider the following statements, I and II: I : [Rh(CO)2 I2]- catalytically converts CH3 I and CO to CH3 COI II : [Rh(CO)2 I2]- is… · Organometallic Compounds – General
ABC26IN1449 · The geometry of [ReH9]2- is · Organometallic Compounds – General
ABC26IN1450 · According to isolobal analogy, the right set of fragments that might replace Co(CO)3 in [Co4(CO)12] is · Organometallic Compounds – General
ABC26IN1451 · According to Wade's rules, the correct structural types of [Co (eta 5-C5 H5) B4 H8] and [Mn (eta 2-B3 H8)(CO)4] are · Cluster Compounds Wade Rules
ABC26IN1452 · The correct geometry of [Rh6 C(CO)15]2- is · Organometallic Compounds – General
ABC26IN1453 · Product A in the following reaction is 16 · Cluster Compounds Wade Rules
ABC26OR0945 · In the IR spectrum, carbonyl absorption band for the following compound appears at · NMR 1H
ABC26OR0982 · 'H NMR spectrum of an organic compound recorded on a 500 MHz spectrometer showed a quartet with line positions at 1759,1753,1747,1741 Hz… · NMR 1H
ABC26OR0983 · Number of signals present in the proton decoupled 13 C NMR spectrum of the following compound is · NMR 13C
ABC26OR0984 · 1 H ~ NMR spectrum of a mixture of benzene and acetonitrile shows two singlets of equal integration. The molar ratio of benzene… · NMR 1H
ABC26OR0985 · O 48. The compound that exhibits following spectral data is 1 H NMR: delta 8.0(d, J=12.3 Hz, 1 H). · Combined Structure Elucidation
ABC26OR1046 · The correct sequence of pericyclic reactions involved in the following transformation is · Sigmatropic Shifts
ABC26OR1079 · The major product formed in the following reaction is · Photocycloaddition
ABC26PH0934 · For a reaction with an activation energy of 49.8 kJ mol-1, the ratio of the rate constants at 600 K and 300 K, (k600 / k300), is… · Arrhenius Activation
ABC26PH0935 · According to the transition state theory, the plot with slope equal to (Delta H+)/R is · Chemical Kinetics – General
ABC26PH0936 · A reaction goes through the following elementary steps A+B [k-1]k1 2 C (fast) A+C k2 D (slow) Assuming that steady state approximation can… · Steady State Approximation
ABC26PH0937 · For two reactions X(g)+Y(g) → Z(g) (1) M(g)+N(g) → P(g) (2) according to the collision theory, the ratio of squares of pre-exponential… · Arrhenius Activation
ABC26PH0938 · The rate of an acid-catalyzed reaction in aqueous solution follows the rate equation r=k [X+] [Y2-] [H+] If k16 and k4 are rate constants… · Rate Laws Order
ABC26PH0964 · Covariance is defined by the relation Cov(x, y)=-. Given the arbitrary constants A, B and C, Cov(x, y) will be zero if · Data Analysis – General
ABC26PH1006 · The ionic mobilities of NH4+and HCO3-are 6 × 10-4 V-1 s-1 and 5 × 10-4 V-1 s-1, respectively. The transport numbers of NH4+and HCO3-are… · Conductance
ABC26PH1007 · The ionic strength of a solution containing 0.008 M AlCl3 and 0.005 M KCl is · Debye Huckel
ABC26PH1008 · Given : (i) Zn+4 NH3 → Zn (NH3)4 2++2 e, E0=1.03 V (ii) Zn → Zn2++2 e, E°=0.763 V the formation of the complex Zn (NH3)4 2+ is approximately · Electrochemistry – General