If the coal is buried in the earth for a long time what will happen??
If coal remained buried inside the earth for long time it may change to hydrocarbon or coke.
What will happen if a cell is kept in hypertonic solution for a long time?
(a) What happens when carbon burns in air? Write the chemical equation of the reaction which takes place. (b) Why are coal and petroleum called fossil fuels? (c) Explain how coal was formed in the earth. (d) Describe how petroleum was formed in the earth. (e) Name a fossil fuel other than coal and petroleum.