97 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26IN1265 · In a specific reaction, hexachlorocyclotriphosphazene, N3P3Cl6 was reacted with a metal fluoride to obtain mixed halo derivatives namely… · 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 [Re2Cl4(PMe2Ph)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 Co4(CO)12 and Ir4(CO)12 is · Cluster Compounds Wade Rules
ABC26IN1384 · The electrophile Ph3 C reacts with [ (eta 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 nu CO 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
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 Delta · 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
ABC26OR1031 · The number of pi electrons participating and the pericyclic mode in the following reaction are · Electrocyclic
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°C and in 10 minutes at 237°C. The activation energy of the reaction is… · 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
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
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… · Molecular Spectroscopy – General
ABC26PH1241 · The orbital with two radial and two angular nodes is · Hydrogen Atom
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
ABC26PH1244 · Consider a particle in a one dimensional box of length 'a' with the following potential V(x)= omega x<0 V(x)= omega x>a V(x)=0 0 ≤ x ≤ a /… · Particle In A Box
ABC26PH1245 · The most probable value of 'r' for an electron in 1s orbital of hydrogen atom is 46. The angular momentum operator Ly · Hydrogen Atom
ABC26PH1246 · The angular momentum operator Ly · Angular Momentum
ABC26PH1247 · The energy for a single electron excitation in cyclopropenium cation in Huckel theory is · Huckel MO Theory
ABC26PH1334 · When Frenkel defects are created in an otherwise perfect ionic crystal, the density of the ionic crystal · Defects
ABC26PH1335 · A compound of M and X atoms has a cubic unit cell. M atoms are at the corners and body centre position and X atoms are at face centre… · Crystal Systems Lattices
ABC26PH1336 · The angle at which the first order Bragg reflection is observed from (110) plane in a simple cubic unit cell of side 3.238 Å, when chromium… · Crystal Systems Lattices
ABC26PH1337 · Both NaCl and KCl crystallize with the fcc structure. However, the X-ray powder diffraction pattern of NaCl corresponds to the fcc… · X Ray Diffraction Bragg
ABC26PH1338 · An element exists in two crystallographic - modifications with FCC and BCC structures. The ratio of the densities of the FCC and BCC… · Crystal Systems Lattices
ABC26PH1339 · Metallic gold crystallizes in fcc structure with unit cell dimension of 4.00 Å. The atomic radius of gold is · Crystal Systems Lattices
ABC26PH1424 · The molecule that has the smallest diffusion coefficient in water is · Surface Chemistry – General
ABC26PH1463 · The correct thermodynamics relation among the following is · Thermodynamics – General
ABC26PH1464 · The heat capacity of 10 mol of an ideal gas at a certain temperature is 300 JK-1 at constant pressure. The heat capacity of the same gas at… · Thermodynamics – General
ABC26PH1466 · The chemical potential (mu i) of the ith component is defined as · Partial Molar Quantities
ABC26PH1467 · Work (w) involved in isothermal reversible expansion from Vi to Vf of n moles of an ideal gas is · Thermodynamics – General
ABC26PH1468 · The boiling point of a solution of non-volatile solid is higher than that of the pure solvent. It always indicates that · Laws State Functions