Updated: Question in GATE 2012 Textile Engineering and Fibre Science Paper with Solution

A question in GATE 2012 Textile Engineering and Fibre Science Paper with Solution has been updated:

A typical curve between equilibrium dye uptake and dyeing temperature goes through a maximum. After the maximum, the dye uptake decreases because

1. Dyeing is an exothermic process
2. Pressure in the dye bath increases
3. Saturation value is reached
4. Kinetic energy increases rapidly