Question

Wooden doors fit very tightly in rainy season why does it happen

Answer 1

It happens because of imbibition. It is a type of diffusion in which solids-colloids absorbs water and increases it's volume. In rainy season the woods absorbs the water and hence increases it's volume making the doors fit tightly.

Answer 2

Answer:

During rainy season there is more humidity in air. The doors get soaked in rain water. Though wood is non-living, it has the ability to absorb water. As the moisture is more in the surrounding area, it enters the wood. The swollen doors then fit very tightly.