629 questions from a source that prints this span of years rather than the year of each question. Each opens with its answer and explanation.
ABC26PH0402 · A platinum electrode is immersed in a solution containing 0.1 M Fe2+ and 0.1 M Fe3+. Its potential is found to be 0.77 V against SHE. Under… · Electrochemistry – General
ABC26PH0403 · Given the E0 values for the following reaction sequence, Mn6+ 1.28 V Mn5+ 2.9 V Mn4+ 0.96 Mn3+ 1.5 V Mn2+ the computed value of E0 for Mn6+… · Electrochemistry – General
ABC26PH0404 · The expression for the equilibirum constant (Keq ) for the enzyme catalyzed reaction given below, is E+S k2k1 ES k4k3 P+E · Electrochemistry – General
ABC26PH0405 · The solubility product of AgBr(s) is 5 10-13 at 298 K . If the standard reduction potential of the half-cell, E_Ag AgBr(s) Br-0 is 0.07 V… · Electrochemistry – General
ABC26PH0406 · The mean ionic activity coefficient of 0.001 molal ZnSO4(aq) at 298 K according to the Debye-Huckel limiting law is (Debye-Huckel constant… · Debye Huckel
ABC26PH0407 · The limiting currect (in mu A ) from the reduction of 3 10-4 M Pb2+, using a dropping mercury electrode (DMF) with characteristics, m=3.0… · Electrochemistry – General
ABC26PH0409 · The mobility of a univalent ion in aqueous solution is 6.00 10-8 m2 s-1 V-1 at 300 K . Its diffusion coefficient at 300 K is X 10-9 m2 s-1… · Electrochemistry – General
ABC26PH0410 · The ionic activity coefficients of Ca2+ and F-are 0.72 and 0.28 , respectively. The mean activity coefficient of CaF2 is ____ (up to two… · Electrochemistry – General
ABC26PH0411 · The diffusion limiting current (Id ) at a dropping mercury electrode for an aqueous Mg (II) solution of concentration 'c' (mol L-1 ) is 300… · Electrochemistry – General
ABC26PH0412 · The temperature derivative of electrochemical potential E at constant pressure, (( E)/( T) )P is given by · Electrochemistry – General
ABC26PH0413 · The Latimer diagrma of oxygen is given below. The value of x is ____ V. (Upto two decimal places) · Electrochemistry – General
ABC26PH0414 · The molar conductivity of a 0.01 M weak acid (HX) at 298K, measured in a conductivity cell with cell constant of 0.4 cm-1, is 64.4 Scm2… · Conductance
ABC26PH0415 · Consider the electrochemical cell M(s)|MI2(s)|MI2(aq)|M(s) where 'M' is a metal. At 298 K, the standard reduction potential are… · Nernst Cells
ABC26PH0416 · The activity of ' m ' molal CuSO4 solution can be expressed in terms of its mean activity coefficient ( )as: · Electrochemistry – General
ABC26PH0417 · At 25°C, the emf (in volts, rounded off to three decimal places) of the cell, Ag|AgBr(s)| Br-(a=0.20), Cu2+(a=0.48), Cu+(a=0.24) Pt is ____… · Nernst Cells
ABC26PH0418 · The CORRECT 'voltage (E) versus time' excitation signal used in cyclic voltammetry is · Polarography Voltammetry
ABC26PH0419 · In an electrochemical cell, Ag+ ions in AgNO3 are reduced to Ag metal at the cathode and Cu is oxidized to Cu2+ at the anode. A current of… · Electrochemistry – General
ABC26PH0420 · A 5 V battery delivers a steady current of 1.5 A for a period of 2 h. The total charge tht has passed through the circuit is ____ Coulombs. · Electrochemistry – General
ABC26PH0421 · (being typed) · Electrochemistry And Conductance – General
ABC26PH0422 · (=m2 2 ) 35. (E_ cell =0.058 V ) 36(?) 37(c) · Electrochemistry And Conductance – General
ABC26PH0423 · (being typed) · Electrochemistry And Conductance – General
ABC26PH0424 · The triple point for water is · Equilibria – General
ABC26PH0425 · Change in chemical potential (in kJ/mol) for the equilibrium H2 O (liquid) =H2 O (gas) at 298 K is · Equilibria – General
ABC26PH0426 · The phases at 55 mole percent B and 108 K are, · Equilibria – General
ABC26PH0427 · What happens if a small amount of solid B is added to the above mixture while keeping the temperature constant? · Equilibria – General
ABC26PH0428 · The mixture at 25 mole percent B and at 124 K is cooled slowly to 114 K . The resulting phases are · Equilibria – General
ABC26PH0429 · 40 millimoles of NaOH are added to 100 mL of a 1.2 M HA and Y M NaA buffer resulting in a solution of pH 5.30. Assuming that the volume of… · Equilibria – General
ABC26PH0430 · The number of degrees of freedom for a system consisting of NaCl(s), Na+(aq) and Cl-(aq) at equilibrium is · Equilibria – General
ABC26PH0431 · For a one component system, the maximum number of phases that can coexist at equilibrium is · Equilibria – General
ABC26PH0432 · The number of degrees of freedom of a system consisting of solid sucrose in equilibrium with an aqueous solution of sucrose is · Equilibria – General
ABC26PH0433 · Among the following, the equilibrium which is NOT affected by an increase in pressure is · Equilibria – General
ABC26PH0434 · Two liquids B and C form an ideal solution. In the figure below, the vapour pressure P of this solution is shown as a function of the mole… · Equilibria – General
ABC26PH0435 · Sulfur can exist in four phases. The possible number of triple points is · Equilibria – General
ABC26PH0436 · For the pair of reactions given below (i) N2(g)+3 H2(g) 2 NH3(g) (ii) 1/2 N2(g)+3/2 H2(g) NH3(g) If at a particular temperature, KP 1 and… · Equilibria – General
ABC26PH0437 · On On the pressure-temperature diagram for a one-component system, the point where the solid-liquid and the liquid-gas curves intersect is: · Equilibria – General
ABC26PH0439 · The enthalpy of fusion of ice at 273 K is 6.01 kJ mol-1 and the enthalpy of vaporization of water at 273 K is 44.83 kJ mol-1. The enthalpy… · Equilibria – General
ABC26PH0440 · The temperature-composition (T-x) phase diagram of the two-component system made of X and Y is given below. At a temperature of 288 K and… · Equilibria – General
ABC26PH0441 · m1 and m2 are the slopes (dP/dT) of the solid - liquid equilibrium lines in the P-T phase diagrams of H2 O and CO2, respectively. For P<10… · Equilibria – General
ABC26PH0442 · The enthalpy of vaporization of a liquid at its boiling point (Tb=200 K ) is 15.3 kJ mol-1. If the molar volumes of the liquid and the… · Equilibria – General
ABC26PH0443 · Consider the following phase diagram of CO2 (not to scale). At equilibrium, the INCORRECT statement is: · Equilibria – General
ABC26PH0444 · The equilibrium constant for the reaction (a) NO(g) N2O(g)+NO2(g) at 25°C is closest to: [ Delta Go=-104.18\,kJ; R=8.314\,J\,mol-1\,K-1 ] · Equilibria – General
ABC26PH0445 · The reaction CO(g)+Cl2(g) COCl2(g) at 500°C, with initial pressures of 0.7 bar of CO and 1.0 bar of Cl2, is allowed to reach equilibrium… · Equilibria – General
ABC26PH0446 · The phase diagram of CO2 is shown below: The correct statement(s) about CO2 is/are: · Equilibria – General
ABC26PH0447 · As per the kinetic theory of ideal gases, which of the following statements is NOT correct? · Gases – General
ABC26PH0448 · Which of the following statements in NOT correct regarding fugacity of a Van der Wawals gas? · Gases – General
ABC26PH0449 · One mole each of H2 CO3, and Na2 CO3 are added to water to prepare one litre solution. The pH of the solution is. · Gases – General
ABC26PH0450 · One mole each of acetic acid and sodium acetate are dissolved in 1kg of water. Boiling point of the resulting solution is · Gases – General
ABC26PH0451 · Approximately one hydrogen atom per cubic meter is present in interstellar space. Assuming that the H - atom has a diameter of 10-10 m, the… · Gases – General