116 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26PH1227 · The trial wave function of a system is expanded as psi t=c1 phi 1+c2 phi 2. The matrix elements of the Hamiltonian are phi 1 H phi 1=0; phi… · Variation Method
ABC26PH1228 · One molecular orbital of a polar molecule A B has the form cA psi A+cB psi B, where psi A and psi B are normalized atomic orbital's centred… · Huckel MO Theory
ABC26PH1229 · Suppose, the ground stationary state of a harmonic oscillator with force constant 'k' is given by psi 0=exp [-Ax2] Then, A should depend on… · Harmonic Oscillator
ABC26PH1230 · The energy of a harmonic oscillator in its ground state is 1 / 2 h omega ′. According to the virial theorem, the average kinetic (T) and… · Harmonic Oscillator
ABC26PH1231 · The energy of a hydrogen atom in a state is (-hc RH)/25 (RH=R y d b e r g. constant). The degeneracy of the state will be · Hydrogen Atom
ABC26PH1232 · In a many-electron atom, the total orbital angular momentum (L) and spin (S) are good quantum numbers instead of the individual orbital… · Angular Momentum
ABC26PH1233 · The difference in energy levels of n=2 and n=1 of a particle -in- a one dimensional box is 6 units of energy. In the same units, what is… · Quantum Chemistry – General
ABC26PH1327 · The angle between the two planes represented by the Miller indices (110) and (111) in a simple cubic lattice is: · Crystal Systems Lattices
ABC26PH1328 · A metal crystallizes in fcc structure with a unit cell side of 500 pm. If the density of the crystal is 1.33 g/cc, the molar mass of the… · Crystal Systems Lattices
ABC26PH1329 · The packing fraction of a simple cubic lattice is close to · Close Packing
ABC26PH1330 · Crystal A diffracts from (111) and (200) planes but not from (110) plane, while the crystal B diffracts from (110) and (200) planes but not… · Crystal Systems Lattices
ABC26PH1377 · The rotational partition function of H2 is : · Partition Functions
ABC26PH1456 · For water, Delta Hvap ≈ 41 kJ mol-1. The molar entropy of vaporization at 1 atm pressure is approximately · Laws State Functions
ABC26PH1457 · A carnot takes up 90 J of heat from the source kept at 300 K. The correct statement among the following is · Thermodynamics – General
ABC26PH1458 · The fugacity of a gas depends on pressure and the compressibility factor Z(=p V / RT) through the relation (V is the molar volume). For… · Thermodynamics – General
ABC26PH1459 · The internal pressure (∂ U / ∂ V)T of a real gas is related to the compressibility factor Z=p V / RT by [where, V is the molar volume] · Thermodynamics – General