120 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26IN1035 · Compounds K2 Ba [Cu (NO2 )6 ] (A) and Cs2 Ba [Cu (NO2 )6 ] (B) exhibit tetragonal elongation and tetragonal compression, respectively. The… · Electron Transfer Redox
ABC26IN1036 · The most appropriate structure for the complex [Pt2(NH3)2(NCS)2(PPh3)2] is · Coordination Chemistry – General
ABC26IN1207 · The ground state forms of Sm and Eu respectively, are · Lanthanides & Actinides – General
ABC26IN1257 · The reaction of FeCl3 6 H2 O with SOCl2 yields. · Main Group Elements – General
ABC26IN1258 · Among the molten alkali metals, the example of an immiscible pair (in all proportions)is · Main Group Elements – General
ABC26IN1259 · Treatment of ClF3 with SbF5 leads to the formation of a/an · Ring Cage Cluster
ABC26IN1260 · The reason for the chemical inertness of gaseous nitrogen at room temperature is best given · Main Group Elements – General
ABC26IN1261 · Commonly used scintillator for measuring radiation is · Ring Cage Cluster
ABC26IN1262 · Two tautomeric forms of phosphorus acid are · Main Group Elements – General
ABC26IN1263 · The solid state structure of aluminum fluoride is · Main Group Elements – General
ABC26IN1264 · The orbital interactions shown below represent · Main Group Elements – General
ABC26IN1265 · In a specific reaction, hexachlorocyclotriphosphazene, N3P3Cl6 was reacted with a metal fluoride to obtain mixed halo derivatives namely… · Main Group Elements – General
ABC26IN1266 · Xenon forms several fluorides and oxofluorides which exihibit acidic behaviour. The correct sequence of descending Lewis acidity among the… · Main Group Elements – General
ABC26IN1267 · Number of isomeric derivatives possible for the neutral closo-carborane, C2 B10 H12 is · Main Group Elements – General
ABC26IN1268 · For higher boranes 3c-2e 'BBB' bond may be a part of their structures. In B5 H9, the number of such electron deficient bond(s) present… · Boranes Carboranes
ABC26IN1379 · The bond order of the metal-metal bond in the dimeric complex [Re2 Cl4 (PMe2 Ph )4 ] is · Metal Carbonyls
ABC26IN1380 · Which of the following in NOT suitable as catalyst for hydroformylation? · Organometallic Compounds – General
ABC26IN1381 · In a cluster, H3CoRu3(CO)12 total number of electrons considered to be involved in its formation is · 18 Electron Rule
ABC26IN1382 · Among the following clusters, A= [(H) Co6(CO)15 ] B= [(H)2 Os6(CO)18 ] C= [(H)2 Os5(CO)16 ] H is encapsulated in · Cluster Compounds Wade Rules
ABC26IN1383 · The correct statement regarding terminal/bridging CO groups in solid mathrmCo4(CO)12 and mathrmIr4(CO)12 is · Cluster Compounds Wade Rules
ABC26IN1384 · The electrophile Ph3 C reacts with [ (5-C5 H5 ) Fe(CO)2 (CDMe2 ) ]+to give a product A . The product A is formed because · Metal Alkene Alkyne
ABC26IN1385 · Among the following, the correct statement is · Organometallic Compounds – General
ABC26IN1386 · Substitution of L with other ligands will be easiest for the species · Organometallic Compounds – General
ABC26IN1387 · Reaction of Ph2PCH2CH2PPh2 with [RhCl(CO)2]2 in a 2:1 molar ratio gives a crystalline solid A. The IR spectrum of complex A shows vco at… · Organometallic Compounds – General
ABC26IN1388 · On reducing Fe3(CO)12 with an excess of sodium, a carbonylate ion is formed. The iron is isoelectronic with · Cluster Compounds Wade Rules
ABC26OR0960 · In the IR spectrum of p-nitrophenyl acetate, the carbonyl absorption band appears at · IR
ABC26OR0961 · An organic compound having the molecular formula C10 H14 exhibited two singlets in the 1 H NMR spectrum, and three signals in the 13 C NMR… · NMR 1H
ABC26OR0962 · An organic compound (C8 H10 O2 ), which does not change the color of ferric chloride solution, · Combined Structure Elucidation
ABC26OR0963 · Methyl 4-oxopentanoate exhibited signals at delta 208, 172, 51, 37, 32 and 27 ppm in its 13 C NMR spectrum. The signals due to the methoxy… · NMR 1H
ABC26OR1028 · The following reaction proceeds through a · Sigmatropic Shifts
ABC26OR1029 · The number of nodes present in the highest occupied molecular orbital of 1, 3, 5-hexatriene in its ground state is · Pericyclic Reactions – General
ABC26OR1030 · The conditions A-B, required for the following pericyclic reactions are · Pericyclic Reactions – General
ABC26OR1031 · The number of pi electrons participating and the pericyclic mode in the following reaction are · Electrocyclic
ABC26OR1032 · The major product formed in the following reaction sequence is · Pericyclic Reactions – General
ABC26OR1073 · The major product formed in the following photochemical reaction is · Photocycloaddition
ABC26PH0905 · According to Arrhenius equation ( k= rate constant and T= temperature) · Rate Laws Order
ABC26PH0906 · A first order gaseous reaction is 25 \% complete in 30 minutes at 227 oC and in 10 minutes at 237 C. The activation energy of the reaction… · Arrhenius Activation
ABC26PH0907 · In the reaction between NO and H2 the following data are obtained Experiment I: P_H2 constant Experiment II : PNO= constant The orders with… · Chemical Kinetics – General
ABC26PH0960 · The masses recorded when a substance is weighed 4 times are 15.8, 15.4, 15.6 and 16.0 mg. The variance (square of the standard deviation)… · Error Propagation
ABC26PH0985 · In a potentiometric titration, the end point is obtained by observing · Electrochemistry – General
ABC26PH0986 · Electrolysis of an aqueous solution of 1.0 M NaOH results in · Electrochemistry – General
ABC26PH0987 · The cell voltage of Daniel cell [Zn |ZnSO4(aq) \| CuSO4(aq) | Cu ] is 1.07 V. If reduced potential of Cu2+ Cu is 0.34 V, the reduction… · Electrochemistry – General
ABC26PH0988 · Consider the cell: 3 equilibrium constant for the reaction: Zn+2 Fe3+ Zn2++2 Fe2+ at 25 C would be close to · Electrochemistry – General
ABC26PH0989 · The limiting molar conductivities of NaCl, NaI and RbI are 12.7,10.8 and 9.1 mS m2 mol-1, respectively. The limiting molar conductivity of… · Conductance
ABC26PH1109 · The molecule with the smallest rotation partition function at any temperature among the following is: · Molecular Spectroscopy – General
ABC26PH1110 · 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 . The… · Molecular Spectroscopy – General
ABC26PH1111 · The C=O bond length is 120 pm in CO2. The moment of inertia of CO2 would be close to (masses of C and O are 1.9 10-27 kg and 2.5 10-27 kg… · Molecular Spectroscopy – General
ABC26PH1241 · The orbital with two radial and two angular nodes is · Hydrogen Atom
ABC26PH1242 · Consider a two-dimensional harmonic oscillator with potential energy V(x, y)=1/2 kx x2+1/2 ky y2. If _nx(x) and _ny(y) are the… · Harmonic Oscillator
ABC26PH1243 · The quantum mechanical virial theorem for a general potential V(x, y, z) is given by ( v)/( x)+y ( v)/( y)+z ( v)/( z) where T is the… · Postulates Operators