Chemistry questions
29404 published questions with worked solutions.
- The atomic weight of Fe is 56. The weight of Fe deposited from FeCl_3 solution by passing 0.6 faraday of electricity is _________
- One gram of which of the following compound will require maximum amount of electricity for its decomposition?
- At 18℃, the conductance of H^+ and CH_3COO^- at infinite dilution are 315 and 35 mho ,cm^2 ,eq^ -1 respectively. The molar...
- Aluminium oxide may be electrolysed at 1000℃ to furnish aluminium metal (At. Mass = 27 amu; 1 Faraday = 96,500 Coulombs). The...
- Given l/a = 0.5 cm^ -1 , R = 50 ohm, M = 1.0. The molar conductance of the electrolytic cell is _______ [Orissa JEE 2005]
- Standard reduction potential of Au^ 3+ /Au and Sn^ 4+ /Sn^ 2+ electrodes are 1.5 V and 0.15 V respectively. The net reaction is...
- Consider the following cell reaction: 2Fe_ (s) + O_ 2(g) + 4H^+_ (aq) 2Fe^ 2+ _ (aq) + 2H_2O_ (l) , E° = 1.67 V. At [ Fe^ 2+ ] =...
- The electrode where de-electronation takes place acts as ________ [MH CET 2001]
- The e.m.f. of galvanic cell, with electrode potentials of Zn = + 0.76 V and that of Cu = −0.34 V, is ________
- Nernst equation for Zn^ 2+ _ (aq) + 2e^- Zn_ (s) is E_ (Zn^ 2+ /Zn) = _________ [MH CET 2008]
- The e.m.f. of the cell Zn|Zn^ 2+ (0.01 ,M)||Fe^ 2+ (0.001 ,M)|Fe at 298 K is 0.2905 then the value of equilibrium constant for...
- The emf of the following cell, Zn|ZnSO_4(1 ,M)||H^+(1 ,M)|H_ 2(g) (1 ,atm)|Pt is 0.769 volts. The reduction potential of Zn...
- The emf of a Daniel cell at 298 K is E_1: Zn|ZnSO_4(0.01 ,M)||CuSO_4(0.1 ,M)|Cu . When the concentration of ZnSO_4 is 1.0 M and...
- The tendency of an electrode to lose electrons is known as _________ [J & K CET 2005]
- Given below are the half-cell reactions: Mn^ 2+ + 2e^- Mn ; E° = −1.18 V and Mn^ 3+ + e^- Mn^ 2+ ; E° = +1.51 V. The E° for 3Mn^...
- EMF of a cell in terms of reduction potential of its left and right electrodes is _______ [AIEEE 2002]
- In the cell Zn|Zn^ 2+ (1 ,M)||H^+(1 ,M)|H_ 2(g) |Pt Zn electrode is replaced by Cu electrode. The cell potential will __________...
- For a cell reaction involving a two-electron change, the standard e.m.f. of the cell is found to be 0.295 V at 25℃. The...
- Standard electrode potential for Sn^ 4+ |Sn^ 2+ couple is +0.15 V and that for the Cr^ 3+ |Cr couple is −0.74 V. These two...
- Consider the cell Cr|Cr^ 3+ (1 ,M)||Fe^ 2+ (1 ,M)|Fe , E^ _ Cr = -0.740 V; E^ _ Fe = -0.440 V, G^ for the above cell is ________...