Question

Wet paper does not burn while a dry paper catches fire easily. Why

Answer 1

Thanks for asking the question.
It is difficult to burn a wet paper because it contains water. A lot of heat is required to evaporate this water( to dry the paper). Only After the water is completely removed and the paper is totally dry, the heat is used to reach the ignition point of the paper from where it then starts to burn. 
Hope it helps.