The compound among the following that can be used as fuels is-

1. Methane
2. Methanol
3. Sulphuric acid
4. Both 1 and 2
Subtopic:  Batteries & Salt Bridge |
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Rusting of iron is envisaged as setting up of an electrochemical cell because: 

1. Oxidation of iron takes place during rusting.
2. Reduction of iron takes place.
3. Iron shows disproportionation reaction.
4. Oxygen is getting oxidised.

Subtopic:  Batteries & Salt Bridge |
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