Question

to prevent from accidental fires some metal are kept immersed in kerosene oil why

Answer 1

Some metals are immersed in kerosene to prevent accidental fires,because they react vigorously with oxygen or air .
Like sodium (Na) .It react vigorously with oxygen and may cause accidents so it should be kept in kerosene .

Answer 2

Sodium and potassium are very reactive metals and and combine explosively with air as well as water. Hence, they catch fire if kept in open. Therefore, to prevent accidental fires