70 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26PH0941 · Photochemical decomposition of HI takes place with the following mechanism HI + h nu (Ia) → H + I; H + HI k1 H2 + I; I + I + M k2 I2 + M… · Chemical Kinetics – General
ABC26PH0943 · Arrhenius equations for two chemical reactions are: k1 = A1e-E1/RT, k2 = A2e-E2/RT. If E1 > E2 then at a given temperature T · Arrhenius Activation
ABC26PH1010 · The electrochemical cell potential (E), after the reactants and products reach equilibrium, is (E0 is the standard cell potential and n is… · Electrochemistry – General
ABC26PH1011 · The specific conductance of a solution is 0.176 Omega -1 cm-1. If the cell constant is 0.255 cm-1, the conductance (Omega -1) of that… · Conductance
ABC26PH1012 · The standard cell potential for the reaction Zn(s) + Cu2+(aq) ⇔ Zn2+(aq) + Cu(s) is +1.10 V. The Gibbs free energy change during the… · Electrochemistry – General
ABC26PH1013 · A solution of Fe3+ is titrated potentiometrically using Ce3+ solution at 25°C. The emf (in V) of the redox system thus formed when, (i) 50%… · Nernst Cells
ABC26PH1014 · The standard cell potential of cell, Pt | H2(g) | HBr(aq) | AgBr(s) | Ag(s), was measured over a range of temperatures, and the data was… · Electrochemistry – General
ABC26PH1132 · For a certain magnetic field strength, a free proton spin transition occurs at 700 MHz. Keeping the magnetic field strength constant the… · Molecular Spectroscopy – General
ABC26PH1133 · The first electronic absorption band maximum of a polar and relatively rigid aromatic molecule appears at 310 nm but its fluorescence… · Raman
ABC26PH1189 · For a monodisperse polymer, the number-average molar mass (MN) and weight-average molar mass (Mw) are related according to · Polymer Chemistry – General
ABC26PH1190 · A polydisperse polymer sample has ten molecules of molar mass 20,000 g mol-1 and fifteen molecules of molar mass 10,000 g mol-1. The… · Polymer Chemistry – General
ABC26PH1352 · Metallic silver crystallizes in face-centred-cubic lattice structure with a unit cell of length 40 nm. The first order diffraction angle of… · Crystal Systems Lattices
ABC26PH1353 · Polonium is the only metal known to exist in a simple cubic lattice form. The density of polonium at 0°C is measured to be 10.00 g/cm3. The… · Crystal Systems Lattices
ABC26PH1398 · The first excited state (2P1/2) of fluorine lies at an energy of 400 cm-1 above the ground state (2P3/2). The fraction of Fluorine atoms in… · Statistical Thermodynamics – General
ABC26PH1435 · An intense purple colour (Plasmon band) is exhibited by a colloid consisting of spherical · Colloids Micelles
ABC26PH1496 · A one-component system with the associated phase diagram (see the figure) is not possible because · Phase Equilibria
ABC26PH1497 · A phase transition process is always · Thermodynamics – General
ABC26PH1498 · The correct statement for any cyclic thermodynamic process is · Thermodynamics – General
ABC26PH1499 · The fugacity of a real gas is less than the pressure (P) of an ideal gas at the same temperature (T) only when (Tb is the Boyle temperature… · Thermodynamics – General
ABC26PH1500 · The minimum work required by an engine to transfer 5 J of heat from a reservoir at 100 K to one at 300 K is · Thermodynamics – General