On which of the followings, the rate of permeation of gases in plastics depends? A. Type of plastics B. Thickness of plastics C. Concentration of gas D. Temperature of gas

Correct option is D

The permeation of gases through plastics depends on:
Type of plastic (molecular structure)
Thickness of plastic (barrier property)
Gas concentration gradient
Temperature (higher temp increases permeability) Hence, all four factors are relevant.