Let there be a small sticky area on the wall of the container of a gas. Molecules hitting the area sticky there permanently. Is the pressure less or more there as compared to other area of the wall?

cbse
kinetictheoryofgases

#1

Assuming no sticky area, change in momentum on collision
= mv-(- mv) = 2mv
Due to sticky area, change in momentum = mv - 0 =mv
Clearly momentum is halved so pressure is also halved in respect of sticky area.