Electrochemistry questions
1808 published questions with worked solutions.
- Sodium cannot be extracted by the electrolysis of brine solution because:
- Molten NaCl conducts electricity due to the presence of:
- Sodium is manufactured by the electrolysis of a fused mixture of sodium and calcium chlorides in a steel cell using a graphite...
- The highest oxidation potential stands for:
- Calcium is extracted by the electrolysis of:
- Moderate electrical conductivity is shown by [WB-JEE 2007]
- Which metal is protected by a layer of its own oxide?
- Anodising can be done by electrolyzing dilute H_2SO_4 with Al as anode; this results in
- For the half-cell reaction M^ 2+ + 2e^- M, E° (in volts) are given for different metals: Metal: Cu, Zn, Fe, Pb, Sn E° (V): 0.34,...
- Aluminium is more reactive than iron but aluminium is less easily corroded than iron because:
- The protective film of oxide on the surface of Al metal may be strengthened by:
- Metal protected by a layer of its own oxide is:
- Anodised aluminium is:
- Aluminium metal is corroded in coastal places near the sea, because the protective oxide film:
- Aluminium becomes passive in nitric acid because it:
- The metal used in acid storage batteries is:
- Lead may be replaced from its salt solution by:
- Electrode potentials for the general reaction M^ 3+ _ (aq) + 3e^- M_ (s) are given below. M belongs to group 13. The electrode...
- The highest electrical conductivity among the following 0.1 M aqueous solutions is of
- Kolbe's electrolysis proceeds via
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