The characterization methods for ultrafiltration membranes is/are follows _________ Gas adsorption-desorption Thermoporometry Liquid displacement All of these

The correct answer to your question is "All of these."

Explanation:

Each of the listed characterization methods—Gas adsorption-desorption, Thermoporometry, and Liquid displacement—are indeed used to analyze ultrafiltration membranes. Here's a brief overview of each method:

1. Gas Adsorption-Desorption: This technique is used to measure the surface area and porosity of membranes.

2. Thermoporometry: It involves assessing pore size distribution using the freezing point depression of a liquid in the pores of the membrane.

3. Liquid Displacement: This method measures the volume and permeability of the pores by displacing a liquid with the membrane submerged.

Since all of these methods contribute to the characterization of ultrafiltration membranes, "All of these" is the correct choice.