Chemistry questions
29404 published questions with worked solutions.
- Which of the following metals when coupled will give maximum e.m.f. for a voltaic cell?
- A, B, C and D are four elements whose standard oxidation potentials are +2.82 V, +2.71 V, +1.67 V and -2.87 V. The strongest...
- When an aqueous solution of sulphuric acid is electrolyzed the ion discharges at the anode is
- During discharging of lead storage cell, the reaction taking place at cathode is represented by :
- In a dry cell cathode is
- If an external opposing E. M. F. is slightly greater than E.M.F. of Daniel cell the reaction will
- In lead accumulator the electrolyte used is
- In Daniel cell zinc displaces copper from CuSO_4 solution since it has
- Which of the following is a secondary cell?
- In the storage battery during charging
- The cell that was used as the primary source of electrical energy on the Appolo moon flights is
- The electrolyte used in mercury cell is
- In a dry cell, zinc container is protected from the atmosphere by covering it with
- The anode in a dry cell is
- The dry cell do not have a long life because
- Lead accumulator is a secondary storage cell because
- The voltage of Pb-accumulator cell depends on
- Lead accumulator cell consists of
- The specific gravity of H_2SO_4 after complete discharging becomes
- In case of Daniel cell Zn/Zn^ 2+ //Cu^ 2+ /Cu which of the following is NOT true?