235 questions from a source that prints this span of years rather than the year of each question. Each opens with its answer and explanation.
ABC26PH0731 · The Maxwell-Boltzmann distribution f (vx ) of one-dimensional velocities vx at temperature T is [Given: A is a normalization constant such… · Gaseous State – General
ABC26PH0732 · For a van der Waals gas, the critical temperature is 150 K and the critical pressure is 5 106 Pa. The volume occupied by each gas molecule… · Gaseous State – General
ABC26PH0733 · The pH of a solution prepared from 0.005 mole of Ba(OH)2 in 100 cc water is · Ionic Equilibrium – General
ABC26PH0734 · The solubility products (Ksp ) for three salts MX, MY2 and MZ3 are 1 10-8, 4 10-9 and 27 10-8, respectively. The solubility of these salts… · Ionic Equilibrium – General
ABC26PH0735 · (a) Calculate the pH of a solution obtained by mixing 50.00 mL of 0.20 M weak acid HA (Ka=10-5) and 50.00 mL of 0.20 M NaOH at room… · Ionic Equilibrium – General
ABC26PH0736 · The pH of a 1.0 10-3 M solution of a weak acid HA is 4.0. The acid dissociation constant Ka is: · Ionic Equilibrium – General
ABC26PH0737 · Which one of the following species is the conjugate base of HO-? · Ionic Equilibrium – General
ABC26PH0738 · If Ksp is the solubility product of a sparingly soluble salt A3 X2, then its solubility is · Ionic Equilibrium – General
ABC26PH0739 · The pH of a 1 10-8 M HCl solution is close to · Ionic Equilibrium – General
ABC26PH0740 · A 50 mL solution of 0.1 M monoprotic acid (Ka=1 10-5 . at 298 K) is titrated with 0.1 M NaOH at 298 K . Calculate the solution after the… · Ionic Equilibrium – General
ABC26PH0741 · The minimum concentration of silver ions that is required that is required to start the precipitation of Ag2 S (Ksp=1 10-51 ) in a 0.1 M… · Ionic Equilibrium – General
ABC26PH0742 · The hydrolysis constant (Kh ) of NH4 Cl is 5.6 10-10. The concentration of H3 O+in a 0.1 M solution of NH4 Cl at equilibrium is · Ionic Equilibrium – General
ABC26PH0743 · The acid dissociation constant (Ka ) for HCOOH, CH3 COOH, CH2 ClCOOH and HCN at 25 C are 1.8 10-4, 1.8 10-5, 1.4 10-3 and 4.8 10-10… · Ionic Equilibrium – General
ABC26PH0744 · At 298 K , calculate the solubility of metal sulfide, MS(s), in a saturated solution of H2 S where the concentration of H2 S and pH are… · Ionic Equilibrium – General
ABC26PH0745 · At 25°C, the solubility product (Ksp ) of CaF2 in water is 3.2 10-11. The solubility (in mole per kg of water) of the salt at the same… · Ionic Equilibrium – General
ABC26PH0746 · The pKa values of H3 PO4 are 2.12, 7.21 and 12.67. The pH of a phosphate buffer containing 0.2 M NaH2 PO4 and 0.1 M Na2 HPO4 is ____ · Ionic Equilibrium – General
ABC26PH0747 · At 298 K, 0.1 mol of ammonium acetate and 0.14 mol of acetic acid are dissolved in 1 L of water. The pH of the resulting solution is… · Ionic Equilibrium – General
ABC26PH0748 · The solubility of PbI2 in 0.10 M KI(aq) is ____ 10-7 M (rounded up to two decimal places). [The solubility product, Ksp=7.1 10-9 ] · Ionic Equilibrium – General
ABC26PH0749 · One liter of a buffer solution contains 0.004 mole of acetic acid (pKa=4.76 ) and 0.4 mole of sodium acetate. The pH of the solution is… · Ionic Equilibrium – General
ABC26PH0750 · A buffer solution is prepared by mixing 0.3 M NH3 and 0.1 M NH4 NO3. If Kb of NH3 is 1.6 10-5 at 25 C, then the pH (rounded off to one… · Ionic Equilibrium – General
ABC26PH0751 · The radioactive isotope used to locate brain tumors is · Radioactive Decay Kinetics
ABC26PH0752 · The total number of steps involved and number of beta particles emitted in the spontaneous decay of 92238 U 82206 Pb respectively, are · Radioactive Decay Kinetics
ABC26PH0753 · For the following fusion reaction, 4 1 H 4 He+2 beta ++2 + gamma the Q-value (energy of the reaction) in MeV (rounded off to one decimal… · Fission Fusion
ABC26PH0754 · For the following system in equilibrium, CaCO3(s) CaO(s)+CO2(g) the number of components, (C), phases (P) and degrees of freedom (F)… · Phase Equilibrium – General
ABC26PH0755 · The phase diagram of a pure substance is sketched below. The number of degrees of freedom at points P 1, P 2 and P 3 , respectively are · Phase Equilibrium – General
ABC26PH0756 · The solid-liquid phase diagram for the Mg-Zn system is shown in the figure below where the vertical line at X(Mg)=0.33 represents the… · Phase Equilibrium – General
ABC26PH0757 · The maximum number of phases that can co-exist in equilibrium for a one component system is: · Phase Equilibrium – General
ABC26PH0758 · The phase diagram for the lead-antimony system at a certain pressure is given below. (i) Identify the phases and components in region I and… · Phase Equilibrium – General
ABC26PH0759 · The vapour pressures of solid and liquid chlorine are given by e P^ solid =24-3900/T and e P^ liq =18-2600/T where P_ solid and P_ liq are… · Phase Equilibrium – General
ABC26PH0760 · The number of degrees of freedom in the homogeneous liquid region of a two component system with a eutectic point, at one atmosphere… · Phase Equilibrium – General
ABC26PH0761 · The number of degrees of freedom of liquid water in equilibrium with ice is · Phase Equilibrium – General
ABC26PH0762 · (being typed) · Phase Equilibrium – General
ABC26PH0763 · (being typed) · Phase Equilibrium – General
ABC26PH0764 · The carbon-oxygen bond in an organic compound absorbs electromagnetic radiation of frequency 6 1013 Hz. This frequency corresponds to the… · Physical Spectroscopy – General
ABC26PH0765 · The correct order of the fundamental vibrational frequencies of the following diatomic molecules is · Physical Spectroscopy – General
ABC26PH0766 · For H2 molecule, the fundamental vibrational frequency (ve ) in wavenumbers can be taken as 4400 cm-1. The zero-point energy of the… · Physical Spectroscopy – General
ABC26PH0767 · Among the following, microwave active molecule(s) is/are · Physical Spectroscopy – General
ABC26PH0768 · The forces constant for H35 Cl and D35 Cl are the same and both can be considered as harmonic oscillators. H35 Cl has a fundamental… · Physical Spectroscopy – General
ABC26PH0769 · The separation of energy levels in the rotational spectrum of CO is 3.8626 cm-1. The bond length (assume it does not change during… · Physical Spectroscopy – General
ABC26PH0770 · (being typed) · Physical Spectroscopy – General
ABC26PH0771 · Use the time-independent Schrodinger equation to calculate the energy of a particle of mass "m" with V=0 in the state =8a3 ( pi x)/a ( pi… · Particle In A Box
ABC26PH0772 · The wavelength for a particle (moving in a ring) is (2 pi )-1 / 2 (2 i phi ), where phi is the polar angle. The probability of finding the… · Particle In A Box
ABC26PH0773 · (a) The electronic wavefunction () for hydrogen atom in the 2 s state is given as (2-ra0 ) (-r2 a0 ) Determine the most probable radial… · Particle In A Box
ABC26PH0774 · The normalisation constant 'A' for the wavefunction ( phi )=Ae(im phi ) where 0 phi 2 pi is: · Quantum Chemistry – General
ABC26PH0775 · Deduce whether the matrices A and B commute or not. A= (arrayll 2 & 1 \\ 0 & 1 array ) B= (arrayll 1 & 1 \\ 0 & 1 array ) · Quantum Chemistry – General
ABC26PH0776 · If the electron were spin 3 / 2 particles, instead of spin 1 / 2, then the number of electrons that can be accomodated in a level are · Angular Momentum
ABC26PH0777 · For a particle in a cubic box, the total number of quantum number needed to specify its state are · Particle In A Box
ABC26PH0778 · Using Heisenberg's uncertainty principle, derive an expression for the approximate ground state energy of a particular of mass m in a one… · Particle In A Box
ABC26PH0779 · Find the eigenvalues of the following 3 3 matrix given that 2 is one of the eigen values. Compute the determinant of matrix using the eigen… · Quantum Chemistry – General
ABC26PH0780 · Which of the following is NOT a solution of the equation d2 xdt2+ omega 2 x=0 · Quantum Chemistry – General