Why does oil rise on a wick of a lantern?
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Due to presence of pores (narrow spacings) in the wick, capillary action takes place, which makes the oil to rise in the wick.
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Kerosene oil rises up in wick of a lantern because of capillary action. If the surface tension of oil is zero, then it will not rise, so oil rises up in a wick of a lantern due to surface tension.
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