Chemistry questions
29404 published questions with worked solutions.
- Number of Farday's required to deposit 4 g of H_2 is
- The SOP values of A, B, C and D are -0.03 V, +0.1.08 V, -0.07 V and +0.1 V respectively. The spontaneous cell reaction takes...
- Oxidizing and reducing property of elements depends upon [MHT-CET 2001]
- If 9650 coulombs of electricity is passed through a copper sulphate solution, the number of moles of copper deposited will be
- Electrolysis of dilute nitric acid will yield at cathode
- The electrode where de-electronation takes place, acts as [MHT-CET 2001]
- The e.m.f. of the following cell, Zn The reduction potential of Zn electrode will be [MHT-CET 2001]
- The E^0_ cell value for Pt, H_2 | H^+ || Ag^+ | Ag is (E^0_ Ag/Ag^+ = -0.799 V)
- Reduction potential of A, B, C and D are 0.8 V, 0.79 V, 0.34 V and -2.37 V respectively. Which element displaces all other three...
- When 0.5 amp of current was passed for 200 seconds, 0.34 gm of copper was deposited, the electrochemical equivalent of copper...
- 10^ -2 kg of a metal of eq. wt 1.0 10^ -1 kg is deposited by passing ____________ coulombs.
- The e.m.f. of a cell consisting of standard hydrogen electrode and a zinc electrode is found to be 0.74 volt. The SHE is the...
- Daniel cell operates under nonstandard state conditions. If the equation of the cell reaction is multiplied by 2 then
- The reaction M^ 2+ + 2e^- M has standard potential of -0.66 V. This means
- If m is the mass of a substance with equivalent weight E and Q is quantity of electricity passed, then
- G^0 for the reaction Ag^+(aq) + 1 2 H_2(g) H^+(aq) + Ag(s), where standard potential for silver half cell reaction is 0.8V, will...
- The e. m. f. of the cell Zn|Zn^ 2+ | Cu^ 2+ |Cu can be increased by
- During rusting of iron it gets
- A, B, C and D are four elements with E^0_ oxd as +2.82, +2.71 V, +1.67 V, -2.87 V respectively. The strongest reducing agent is
- The reaction, 2Br^-(aq) + Sn^ 2+ (aq) Br_2(l) + Sn(s) with the standard potentials, E^0_ Sn = -0.114 V, E^0_ Br_2 = +1.09 V, is