Question

plz answer it urgently (what are the two essential conditions for rusting? how does oiling of iron object prevent rusting

Answer 1

Two conditions which are essential for rusting are-
1) Moisture or water
2) Carbon Dioxide (to make the medium acidic and fasten the reaction)

Oiling prevents objects from rusting because the layer of oil prevent the Iron object to come in direct contact with air and water.

Answer 2

The essential conditions for rusting are the presence of water and oxygen. Oiling prevents the direct contact of the iron with oxygen in the air