Chemistry questions
29404 published questions with worked solutions.
- Given E^ _ Cr^ 3+ /Cr = -0.72 V, E^ _ Fe^ 2+ /Fe = -0.42 V. The potential for the cell Cr|Cr^ 3+ (0.1 ,M)||Fe^ 2+ (0.01 ,M)|Fe is...
- Given E^ _ Fe^ 3+ /Fe = -0.036 V, E^ _ Fe^ 2+ /Fe = -0.439 V. The value of standard electrode potential for the change, Fe^ 3+ _...
- The E^ _ cell value for Pt, H_2|H^+||Ag^+|Ag is _______ [E^ _ Ag/Ag^+ = -0.799 V]
- The electrode potentials for Cu^ 2+ _ (aq) + e^- Cu^+_ (aq) and Cu^+_ (aq) + e^- Cu_ (s) are +0.15 V and +0.50 V respectively....
- The standard redox potentials for the reactions Mn^ 2+ + 2e^- Mn and Mn^ 3+ + e^- Mn^ 2+ are −1.18 V and 1.51 V respectively....
- The cell reaction of a cell is Mg + Cu^ 2+ Mg^ 2+ + Cu (Given E_ Mg^ 2+ /Mg = -2.37 V, E_ Cu^ 2+ /Cu = 0.337 V). The emf of the...
- What will be the emf for the given cell? Pt|H_2(P_1)|H^+_ (aq) |H_2(P_2)|Pt [AIEEE 2002]
- The following cell, Zn|Zn^ 2+ (1 ,M)||Cu^ 2+ (1 ,M)|Cu ; (E^ _ cell = 1.10 V), was allowed to be completely discharged at 298 K....
- The Gibb's energy for the decomposition of Al_2O_3 at 500℃ is as follows: 2 3 Al_2O_3 4 3 Al + O_2 , G = +966 kJ mol^ -1 . The...
- The platinised plate in SHE is used as _________ [MH CET 2008]
- What is standard electrode potential of calomel electrode when unimolar KCl is used?
- The reduction potential of hydrogen half-cell will be negative if ________ [AIEEE 2011]
- Standard hydrogen electrode _________ [MH CET 2007]
- Which colourless gas evolves, when NH_4Cl reacts with zinc in a dry cell battery?
- Specific gravity of sulphuric acid in lead accumulator is ________
- Dry cell converts _________ [MH CET 2003]
- Which of the following statements is TRUE for fuel cells? [AFMC 2000]
- Which of the following is NOT used in hydrogen – oxygen fuel cell?
- Which of the following reaction is used to make a fuel cell? [AIIMS 2003]
- In a hydrogen – oxygen fuel cell, combustion of hydrogen occurs to _______ [AIEEE 2004]